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- Abstract：In the context of climate changes and water shortages,winter wheat production in Hebei lowland plain is facing critical challenges.Meteorological factors during winter wheat growth stages at Wuqiao in Hebei lowland plain from 1981 to 2015 were analyzed,and SIMETAW model was employed to simulate water demand of winter wheat.The water ecological adaptability in winter wheat different growth stages was estimated,and the relatively important meteorological factors affected crop evapotranspiration in corresponding growth stages were proposed.The results showed that:Over the past 35 years,temperature was the most significant changing factor during winter wheat growth stage,of which the lowest temperature increased highly significantly by 0.41℃/10 a and the average temperature increased significantly by 0.27℃/10 a.Rainfall,the second most changing factor,rose by 6.06 mm/10 a in these years.Other four meteorological factors displayed similar un-significant increasing trend.Under the above climate changes,the crop evapotranspiration of winter wheat during growth stage showed slightly increasing trend in total,more specifically,it was declined in 1981-1998 and increased afterward.Water demand was increased during three growth stages (Sowing to Wintering,Reviving to Jointing,Booting to Ripening).Among which,crop evapotranspiration in Reviving to Jointing was significantly higher than the other two stages,and the water ecological adaptability in this stages was the worst,which was only 17.84% on average.The meteorological effectors on crop evapotranspiration in different growth stages were various:From Reviving to Jointing,the effective factors were air relative humidity (-),the highest temperature (+),average wind speed (+),solar radiation (+) and the lowest temperature (+).By using regression equation,the crop evapotranspiration of winter wheat in 2020 and 2030 were predicted in this study,which were 466.7 and 472.6 mm respectively.This study would provide theoretical basis for winter wheat's water conservation system construction in Hebei lowland plain.Keywords：winter wheat;climate change;crop evapotranspiration;ecological adaptability26|11|10<HTML><L-PDF> <Meta-XML>Updated：2024-02-27
- Abstract：A broomcorn millet variety Yumi 2 was used as study object in test base of Yulin Shaanxi to investigate the effects of nitrogen fertilizers on the field microclimate,photosynthetic characteristics and yield of broomcorn millet at the grain filling stage.The results showed that:Compared with the non-fertilization treatment;Nitrogen fertilizer treatments significantly decreased illumination and air temperature,but improved the relative humidity among broomcorn millet plants.With the increase of the fertilizer level,both chlorophyll content (SPAD) and net photosynthetic rate (Pn) of different leaf sites of node showed an increasing trend at the grain filling stage.Among all fertilizer treatments,N4 (N 195 kg/hm2) displayed the greatest effect on the field microclimate and photosynthetic characteristics of broomcorn millet.And the yield of broomcorn millet reached 4 605.8 kg/hm2 under N3 (N 150 kg/hm2) treatment,which increased 44.7% than that under non-fertilization treatment indicating the amount of nitrogen applied was suitable in Yulin,Shaanxi.Keywords：broomcorn millet;nitrogen fertilizers;grain filling stage;field microclimate;photosynthetic characteristics20|8|7<HTML><L-PDF> <Meta-XML>Updated：2024-02-27
- Abstract：Rational nitrogen use plays an important role in increasing the yield and nitrogen (N) efficiency of maize.Through the study of different proportion of nitrogen application rates for base fertilizer at jointing stage and anthesis stage could help managing N fertilizer application and improving N use efficiency.Taking Jinshu 9 as the studied material,base fertilizer,jointing stage fertilizer and anthesis stage fertilizer were applied in different proportions,with 6 treatments.The results showed that multiple nitrogen application was more beneficial to the yield increasing of millet than single nitrogen application.The yield of N4 (2:4:4) was the highest,which was 4 575.62 kg/hm2.Yield reached a significant positive correlation with grain weight per plant and plant height,the correlation coefficients were respectively 0.93 and 0.94;Nitrogen use efficiency,nitrogen agronomic efficiency and nitrogen partial factor productivity were the highest in N4 treatment,nitrogen use efficiency was 19.70% higher than in N1 (base fertilizer 100%) and N2 (base fertilizer 50%,jointing fertilizer 50%) 1.31%,respectively;Nitrogen agronomic efficiency was 25.55% and 23.64% higher than N1 and N2,respectively;The nitrogen partial factor productivity was 8.72% and 8.07% higher than N1 and N2 respectively.So basal fertilizer (20%),the jointing stage (40%) and the anthesis stage (40%) could effectively improve the yield of broomcorn millet and the nitrogen fertilizer use efficiency.Keywords：nitrogen application stages;broomcorn millet;yield;nitrogen use efficiency22|8|7<HTML><L-PDF> <Meta-XML>Updated：2024-02-27
- Abstract：In order to clarify the effects of planting patterns on the yield of millet,millet variety ‘Shanmi 1’ was taken as study material.The effects of sowing in equal bunch planting (CX),sowing in wide-narrow drill (KT),sowing in wide-narrow bunch planting (KX) and sowing in equal drill (CK) on the above-ground dry matter accumulation,leaf chlorophyll content and yield were studied as control.The results showed that the above-ground dry matter accumulation increased of different planting patterns after heading and then decreased with the senescence of plants.The dry matter accumulation of leaf,sheath and stem reached the maximum value 14 d after the heading;Grain displayed "S" type growth trend with the growth of plant;The SPAD value of the top three leaves decreased.The dry matter accumulation and chlorophyll content of the top three leaves in X,KT,and KX were significantly higher than in CK.The yield of KX and KT was significantly higher than that of CX and CK,there was no significant difference between CK and CX.Comprehensive analysis showed that choosing wide-narrow row planting pattern according to local conditions was the key to increase the production and efficiency of broomcorn millet.Keywords：broomcorn millet;planting pattern;accumulation of dry matter;SPAD20|8|4<HTML><L-PDF> <Meta-XML>Updated：2024-02-27
- Abstract：The aim of this study was to investigate and compare the signaling strength of kinase domains (KD) of the receptor-like kinase family (RLK) in responding to pathogen-associated molecular patterns (PAMP).Recombinant RLKs (rRLKs) with extracellular domain of FLS2 and cytoplasmic kinase domain of several RLKs in Arabidopsis were constructed.A total of six rRLKs and FLS2 transient expression vectors were constructed in this study and transformed to Arabidopsis protoplast with 35S::GUS (internal reference) and FRK1::Luciferase (PTI reporter gene vector).After flg22 treatment,the activity of Luciferase and GUS was determined for analyzing the signaling transduction strength of different kinase domain of RLKs.The results showed that:1) The kinase domains of FLS2,EFR,PEPR1 and RLK7 obviously activated the expression of PTI reporter gene FRK1,which played a positive regulatory roles for plant disease resistance;FLS2 KD and EFR KD generated higher signaling output,and there was no significant difference between their signaling transduction intensity (P<0.05);PEPR1 KD and RLK7 KD generated weaker signaling output than that of FLS2 KD and EFR KD,which were respectively 57.13% and 32.92% of FLS2 KD and showed significant difference with FLS2 KD (P<0.05);2) The activation effects of CERK1 KD and NIK1 KD on FRK1 were not obvious,and their signaling transduction intensities were only 9.76% and 7.88% of FLS2 KD,respectively.There was no significant difference with FLS2 NT (Control) (P<0.05);3) However,PSKR1 KD down-regulate FRK1 expression,played a negative regulatory role in PTI.In conclusion,this study provided references for understanding the working mechanisms of PRRs and foundation for creating high efficient rRLK.Keywords：Arabidopsis;plant immunity;receptor-like protein kinases;kinases domain;signal transduction21|8|1<HTML><L-PDF> <Meta-XML>Updated：2024-02-27
- Abstract：Chrysanthemum is an most important varieties of export cut flowers in China.The cost of pinching and removing branches in chrysanthemum production is so high and it affects enterprise benefit and scale production seriously.In this study,formation,genetics,development regulation and molecular improvement of chrysanthemum shoot branching are introduced,and the future research of shoot branching is put forwarded.This study provides references for the plant type breeding and standardized production of chrysanthemum.Keywords：Chrysanthemum morifolium;branches;genetics;development;regulation21|10|2<HTML><L-PDF> <Meta-XML>Updated：2024-02-27
- Abstract：To reveal the molecular mechanisms of petal formation in Paeonia lactiflora,we selected inner and outer petals from P.lactiflora ‘Zi Fengyu’ with anemone type as study object.Using transcriptome sequencing,key gene sequences regulating flower type development were screened.The protein structure and function,subcellular localization were firstly analyzed by bioinformatics method,and then the expression level of petals detected by qPCR.The results showed that two key genes,namely AGAMOUS (AG) and MADS-box protein 2 (MADS2),were determined by sequencing.The protein analysis displayed that AG and MADS2 protein were liposoluble,hydrophilic and unstable.No signal peptide and transmembrane structure indicated two proteins were non-secretory. α-helices were its main elements of the secondary structure and their three-dimensional structure were very similar.Besides,AG and MADS2 protein contained same functional MADS domain.These proteins mostly distributed in other locations rather than in signal peptide secretion pathway.qPCR analysis showed the expression of MADS2 and AG in inner-petal was extremely significant than that in outer-petal.The similarity of AG and MADS2 in protein structure,function and expression suggested that the two proteins probably played same biological functions in the formation process of P.lactiflora petal.Keywords：Paeonia lactiflora;flower type;bioinformatics;gene expression21|8|3<HTML><L-PDF> <Meta-XML>Updated：2024-02-27
- Abstract：To investigate the role of LcPAL from Lycium chinense in drought and salt stress,a phenylalanine ammonia-lyase(PAL)gene was cloned from Lycium chinense by the methods of reverse-transcription PCR and RACE.The full-length cDNA of L.chinense PAL (designated as LcPAL)was 2 544 bp(Genbank No.KX781247)containing a complete open reading frame(ORF)of 2 163 bp,which encoded 720 amino acid residues.Sequence analysis showed that it had typical PAL enzyme active site sequence(GTITASGDLVPLSYIA).Homology analysis indicated that the deduced LcPAL protein was highly homology to other PAL proteins from different species.Phylogenetic tree analysis revealed that LcPAL had closer relationship with PALs from Solanaceae plants than from other plants.The results from Real-Time PCR indicated that the epression of LcPAL gene was the strongest in the leaves of L.chinense,and the least in fruits.Furthermore,LcPAL transcription level was induced under the treatment of PEG and NaCl stresses,but the expression patterns were different.As a result,the gene LcPAL which was cloned and characterized from L.chinense is a member of PAL family typically.The result of study indicated that LcPAL played a role in the development of L.chinense plant.LcPAL also played a role in resistance to drought and salt stress processes.Keywords：Lycium chinense;phenylalanine ammonia-lyase(PAL);gene cloning;expression analysis20|10|8<HTML><L-PDF> <Meta-XML>Updated：2024-02-27
- Abstract：Based on the analysis method of ecological footprint,the water resources ecological footprint,ecological carrying capacity,ecological surplus,and water resources ecological footprint per 10 000 yuan GDP and spatial distribution on water resources ecological footprint and load-carrying capacity of each region in Yanbian area from 2006 to 2015 were analyzed.The results showed that,the water resources ecological footprint displayed a fluctuating upward trend in Yanbian area from 2006 to 2015,agricultural water was dominated,the agricultural water,industrial water,domestic water,ecological water footprint was 99.77×104,19.95×104,18.36×104 and 2.07×104 hm2,respectively,took up 71.2%,14.2%,13.1%,1.5% of the total water resources ecological footprint;The changing trend of water resources ecological carrying capacity and ecological surplus were similar,and the fluctuation was significant;The water consumption showed a decreasing trend from 2006 to 2015,indicating the increasing of utilization of water resources;The spatial distributions of water resources ecological footprint and ecological carrying capacity of 8 counties (cities) in Yanbian area were not balanced,and there were some regional differences.Keywords：water resources;ecological footprint;ecological carrying capacity;ecological surplus;water resources ecological footprint per ten thousand yuan GDP;spatial distribution;Yanbian area20|7|7<HTML><L-PDF> <Meta-XML>Updated：2024-02-27
- Abstract：Organic/inorganic carbon contents and physical-chemical factors in oasis soil,and the correlations between them were analyzed by traditional statistics and redundancy analysis in the northern marginal zones of Tarim Basin.The results showed that the soil organic and inorganic carbon content in different land use types of soil had different distribution pattern.In 0-20,20-50 and 50-80 cm soil layers the average of soil carbon properties (soil organic and soil inorganic carbon) were 6.97,2.95,2.45 g/kg and 4.83,5.25,3.48 g/kg,respectively.In 0-20 cm soil layer,the content of soil organic carbon was highest under natural forest,lowest under sand,the soil inorganic carbon under cotton fields,saline-alkali land,weeds land were similar and much higher than other three types;In 20-50 cm soil layer,the content of organic carbon under natural forests and plantation were reached highest and significantly higher than weeds and sand,the distribution of the inorganic carbon was in line with 0-20 cm soil layer;In 50-80 cm soil layer,the content of organic carbon under orchard and cotton fields is significantly higher than sand,the content of inorganic carbon under different types was not significant in this soil layer.According to the RDA results,the total nitrogen,soil moisture and total salt were significantly positive correlated with soil organic carbon content (P<0.01),and bulk density was significant negative correlated with it (P<0.01).The total salt was significantly positive correlated with soil inorganic carbon content (P<0.01),and the total nitrogen,soil moisture,available potassium were significantly negative correlated with soil inorganic carbon content (P<0.01).There was no significant correlationsbetween pH/available P and the content of soil carbon (P>0.05);The importance of environmental factors to soil carbon content in descending order was nitrogen > bulk density > soil moisture > available P > available K > total salt > pH.Keywords：soil organic carbon;soil inorganic carbon;different land use types;redundancy analysis;the northern marginal zones of Tarim Basin26|14|10<HTML><L-PDF> <Meta-XML>Updated：2024-02-27
- Abstract：In order to obtain the full-length cDNA of Ghrelin in Cervus nippon,RT-PCR and RACE methods were used by using total RNA of abomasus tissue in C.nippon as template.The results of sequence analysis revealed a 539 bp length cDNA containing 46 bp 5'-untranslated region (5'UTR),128 bp 3'-untranslated region(3'UTR)and 351 bp open reading frame (ORF) encoding 116 amino acids.The cDNA sequence alignments of C.nippon Ghrelin gene with human and other animals showed that the cDNA sequence homology of C.nippon Ghrelin was 90.4%-99.1% to reindeer,goat,sheep and cattle,66.9%-76.6% with rhesus monkey,human,pig and dog,only 36.4% with chicken and C.livia.These results indicated that the structure of Ghrelin displayed an obvious varietal specificity,suggesting that Ghrelin might play an important physiological function role in ruminants.Keywords：Cervus nippon;Ghrelin;cDNA clone;homology analysis21|7|1<HTML><L-PDF> <Meta-XML>Updated：2024-02-27
- Abstract：This study aimed to investigate the effects of diets with non-fiber carbohydrate (NFC)/neutral detergent fiber (NDF) levels on the growth performance,slaughter performance and meat quality of male calves.Sixty 2-3 month-old healthy weaned male calves were randomly divided into four groups with fifteen calves in each group,and were fed with four different NFC/NDF ratio diets:1.35 (A group),1.23 (B group),0.94 (C group),0.80 (D group),respectively.The experiments lasted for 105 d,with 15 d of adaptation period and 90 d of formal period.Feed intake of each calf was recorded every day,body weight and body measurements were measured.A total of 6 calves were randomly selected from each group and were slaughtered to determine slaughter performance,meat quality and organ fresh weight.The results showed that:1) Average daily gain and body length growth rate of calves in A group were greater than those in other groups (P<0.05);2) The calves feeding A group diet body weight is 111.40 kg is significantly higher than group C and group D (P<0.05),but no difference was observed in the slaughter rate and pure meat percentage (P>0.05);3) Weight of liver and spleen were 3.25 and 0.70 kg in A group diet,which were significantly higher than those in rest three groups (P<0.05).Meanwhile,the spleen index displayed decreasing tendency with the decreasing of the dietary NFC/NDF level and there were no significant effects on the weight and index of other organs (P>0.05).In conclusion,the growth performance of calves was improved when the ratio of NFC to NDF is 1.35,which could meet the nutrient requirement of male calves aged from 3 to 6 months old.Keywords：meat calves;non-fiber carbohydrate/neutral detergent fiber;growth properties;slaughter performance;meat quality25|7|10<HTML><L-PDF> <Meta-XML>Updated：2024-02-27
- Abstract：The inhibitory spectrum and biological stability of the fermentation broth of Melittin (1-13)-LL (17-30) (M-L) hybrid peptide engineering bacteria obtained from our earlier work were studied.Oxford cup assay was used to mensurate inhibitory spectrum on 16 indicator bacteria and investigate simulative digestive stability and thermal stability.The fermentation broth exhibited antibacterial ability to all tested strains except for Enterococcus faecium,which was a beneficial bacterium in the intestine,and the inhibition diameter more than 20 mm for most bacteria we determined;Treated in simulated gastric juice for 15 min,the antibacterial activity of M-L decreased significantly.However,after processed by simulated intestinal juice and a series of temperature gradient,no significant change on antibacterial activity was observed.In summary,the fermentation broth of hybrid peptide M-L had a broad antibacterial spectrum,excellent temperature stability,but a low stability in gastric juice.Keywords：hybrid antibacterial and antiviral peptide M-L;fermentation broth;inhibitory spectrum;simulated gastrointestinal juice;heat stability20|9|0<HTML><L-PDF> <Meta-XML>Updated：2024-02-27
- Abstract：The effects of steaming and blanching on retention of several nutrient components in spinach and Chinese kale were investigated.Ascorbic acid,vitamin K1,as well as three carotenoids including lutein, β-carotene and α-carotene contents in samples subjected to steaming and blanching treatment of a series of duration were determined.While only less than 10 percent decrease of both vitamin K1 and lutein was observed in two treatments.The retention of ascorbic acid dramatically dropped after blanching,which were 41.6% in spinach and 61.7% in kale.Steaming treatment displayed advantages over blanching treatment in terms of all three nutrients.Both water-soluble and fat-soluble nutrients were well preserved with short-time steaming treatment,which was recommended as a low-fat preparation procedure for green leafy vegetables.Keywords：cooking;spinach;kale;vitamin;carotenoid20|9|0<HTML><L-PDF> <Meta-XML>Updated：2024-02-27
- Abstract：In order to reduce odor substances emissions during kitchen waste composting process,experiments were designed to investigate the effects of ventilation mode on H2S and NH3 emissions.Aerobic composting of kitchen waste and cornstalks was conducted at a ratio of 85:15(wet weight basis)in 100-L reactors for 30 days.The gas emissions were analyzed with a force aeration at rates of 2.2(T1,continuous ventilation),3.3(T2,run 40 min and stop 20 min) and 6.6(T3,run 20 min and stop 30 min)m3/(m3·h),respectively.The results showed all compost products met with national sanitation standard and reached maturity according to composting temperature.In the case of the same total air volume for three treatments,intermittent ventilation was beneficial to reduce H2S emission,but excessive ventilation increased the total sulfur loss during composting process.The NH3 emission reduced as the ventilation decreased,and ventilation mode had little effect on NH3 emission.Taking comprehensive consideration of non-hazard index,H2S and NH3 emissions,and compost quality,the ventilation mode of 3.3 m3/(m3·h)(run 40 min and stop 20 min) was recommended to be applied to control H2S and NH3 emissions during kitchen waste composting process.Keywords：kitchen waste;composting;ventilation mode;H;2;S;NH;326|12|2<HTML><L-PDF> <Meta-XML>Updated：2024-02-27
- Abstract：Because of the characteristics of high flexibility and low cost,there are lots of advantages to use unmanned aerial vehicle(UAV)to collect the real-time information of field.In order to quickly monitoring the growth and development of crops grown in large scale field,a method for rapidly acquiring images of field-grown tobacco using quad-rotor UAV and digital image processing techniques was explored.The results show that under a relatively stable sky radiation condition,the images acquired with low flight height(e.g.20 m) can be used to produce rather high quality ortho-mosaic and 3D reconstruction.The images of individual field-grown tobacco plants were acquired using the vegetation segmentation algorithm based on decision tree to segment tobacco and non-vegetation part.The missing plant number of tobacco in individual plots was computed based on this algorithm and the results agree to the measured values well.Accordingly,this study provided a reliable way for rapidly and accurately accessing the growth and development of field-grown tobacco and studying plant phenotype in large scale.Keywords：unmanned aerial vehicle;crop phenotyping;growth and development;ortho-mosaic;3D point cloud;vegetation segmentation;tobacco30|8|6<HTML><L-PDF> <Meta-XML>Updated：2024-02-27
- Abstract：To solve the problem of the incompact,large space occupation and high transportation and storage cost of film collected,a new compressing and molding system for packing residual plastic film was designed.According to the residual film compression characteristic test and the relaxation test,the optimal operating pressure of the residual film press molding was 7 MPa,and the hydraulic pump system was designed.In order to automatically compress and mold residual plastic film,the control system based on PLC was designed and the flowchart of software control was conducted.The field experiment was committed in the Gongqingtuan Farm of Xinjiang Corps.The results showed that the residual film baler displayed a good working performance and the success rate of the residual film forming reached 88%.And the forming time was 38.6 s,which could meet the requirements of field operations.Keywords：residual plastic film strip;compression molding;hydraulic systems;PLC control;field experiment26|13|4<HTML><L-PDF> <Meta-XML>Updated：2024-02-27
- Abstract：To solve the problem of tartary buckwheat nutrient loss in the traditional boiled hulling process,a new method of nonthermal tartary buckwheat dynamic-pressure grinding hulling was proposed and a hulling machine that had a pressure dynamic adjusting device is developed based on the analysis to the structural feature of tartary buckwheat and the structural defect of exsiting hulling machine.Through single factor experiment,the values of influencing factors was determined,the regression modeles of hulling ratio and perfect kernel ratio were then established respectively by quadratic orthogonal rotary combination tests.Multi parameter optimization was used to determine the optimal parameter combination:Grinding chamber gap 2.6 mm,grinding gasbag pressure 22.3 kPa,robbing chamber gap 4.0 mm,robbing gasbag pressure 5.1 kPa,spindle speed 470 r/min.Under this condition,the perfect kernel ratio and hulling ratio of tartary buckwheat in verification test were 31.8% and 88.1%,respectively.The test result showed that primary reason was the dynamic pressure adjusting device didn't work well which resulting in dissatisfactory performance of tartary buckwheat hulling.Keywords：tartary buckwheat;huller;pressure dynamic adjusting;hulling ratio;perfect kernel ratio27|13|7<HTML><L-PDF> <Meta-XML>Updated：2024-02-27
- Abstract：In order to provide theoretical foundation and technical guidance for pruning,fruit quality evaluating and fruit production predicting,the open center shaped apple tree was taken as research object,and its canopy light distribution model was explored based on apple tree's 3D point cloud structure.3D point clouds reconstruction and the point cloud segmentation technology were used to get apple tree's point cloud at different altitude layers,and the Pixel proportion and Graham scanning algorithms were used to calculate effective projection area of each layer and its covering area and the effective leaf area index of each layer.The apple tree canopy light distribution model was investigated between the actual illumination of each layer and its effective leaf area index.The model calibration and validation results showed that its calibration reached 0.924,and its root mean square error correction (RMSEC) was 0.05;its validation reached to 0.955,its root mean square error of prediction (RMSEP) was 0.04,and its relative percent deviation (RPD) was 4.91 indicating this model had high prediction precision and strong ability of prediction.Keywords：apple tree;3D point cloud;relative light intensity;layer effective leaf area index;canopy light distribution model36|16|2<HTML><L-PDF> <Meta-XML>Updated：2024-02-27
- Abstract：On the basis of provincial panel data of 31 provinces nationwide from 2007 to 2015,this study empirically investigates,which focus on two perspectives of the development of agricultural insurance and the compensation of agricultural insurance are conducted.The effect of policy-supported agricultural insurance on agricultural production via panel quantile regression and the outcome is tested by subsample robustness test.According to the regression outcome,the development of agricultural insurance can significantly improve agricultural production.However,the effect is different by quantile level:In the lower quantile,the development of agricultural insurance has more positive effect on agricultural production.With the increase of quantile,the positive effect of the development of agricultural insurance on agricultural production is gradually diminishing.The effect of the compensation of agricultural insurance on agricultural production is relatively small.Therefore,expanding the coverage of agricultural insurance,especially in the areas of less agricultural production,is important to improve the policy-supported agricultural insurance.Besides,increasing the compensation of agricultural insurance and categories of agricultural insurance is also of great importance to agricultural production.Keywords：agricultural insurance;panel quantile regression;agricultural production;influential effect32|12|1<HTML><L-PDF> <Meta-XML>Updated：2024-02-27
- Abstract：The effectors on aquatic product exportation change from Chinese mainland and Taiwan area to ASEAN are analyzed by using trade data from 1996-2014 and market share model (CMS).The results show that:1) The trade policy in international market plays an important role on exportation change from Chinese mainland and Taiwan area to ASEAN;2) Market demand growth in ASEAN is the main reason of export growth from Chinese mainland and Taiwan area to ASEAN;3)The aquatic product competitive effects of Chinese mainland in ASEAN market keep growing,but growing slowly in great demand markets;Although Taiwan aquatic product competitiveness in ASEAN is increasing,its competition effects is declining in the proportion in recent years because of internal industry issues;4) Along with the market integration,there is more and more high degree of matching between ASEAN aquatic product importation and both sides exportation.In addition,policy recommendations to strengthen fisheries cooperation between Chinese mainland and Taiwan area under the background of "The Belt and Road Initiative",such as matching export and demand,strengthening cross-strait cooperation in the field of fisheries,investing the ASEAN market jointly,and using different marketing strategies in different markets are put forwarded in this study.Keywords：both sides of the Taiwan Straits;ASEAN;aquatic products;Constant Market Share Analysis;fishery cooperation30|13|1<HTML><L-PDF> <Meta-XML>Updated：2024-02-27
- Abstract：In order to change the current situation of the high recycling logistics cost of collecting straw for biomass power plants and explore ways to reduce the recycling cost,the structural composition of the cost was analyzed and its various influencing factors were summarized through constructing two kinds of straw recycling logistics models in this paper.The cost estimation model of straw recycling logistics was constructed based on calculus method,and the sensitivity of the model was analyzed with the practical case.The empirical study demonstrated that the radius factor was the most important factor affecting the cost of recycling logistics and reducing the collection radius properly greatly reduced the cost of transportation.The number of outsourcers could be controlled at about 10 in order to minimize the cost of the final recycling logistics when collecting straw.A reasonable planning was necessary initial biomass power plants site election and biomass power plants should be strictly enrolled by the government in order to avoid intensive construction in a certain area.Keywords：straw;recycling logistics;cost analysis;cost calculation30|13|2<HTML><L-PDF> <Meta-XML>Updated：2024-02-27
- Abstract：By using the Ordered logistic model,empirically analyses on factors affecting supermarkets' operating intention of certified traceability food are conducted based on 283 supermarket sample datum from northeast,north and south area of China.The results show that:The variables,such as ‘The attitude of providing operating information’,‘The degree of emphasis on supplier credit’,‘Operating profit of certified traceable foods’ and ‘The cognition of certification and traceability system’,have positive effects on supermarkets' operating intention of certified traceability food.Meanwhile,‘The attitude of providing operating information’ has the biggest marginal effect on supermarkets' operating intention of certified traceability food.Keywords：certificated traceability food;operating intention;supermarket;Ordered logistic model30|17|1<HTML><L-PDF> <Meta-XML>Updated：2024-02-27
- Abstract：After the cancelation of rape store policy in 2015,rapeseed prices keep falling in domestic market,and farmers' willingness and area of rapeseed cultivation of have dropped.In order to analyze the current problems of rapeseed industry in China,some suggestions on the development of Chinese rape industry by combing the present situation,predicament and cause of rape industry,are put forwarded.Currently domestic rapeseed industry faces with the problems of increased production costs and decreased produce prices,which leading to the decline of rape production and the frustration of farmers planting enthusiasm.There are two reasons for this phenomenon:A large number of imported low-price rapeseed has strong impact on domestic rapeseed market,which resulting in the depresses domestic rapeseed product prices and squeezing the domestic rapeseed industry development space;The small rapeseed management scale and low degree of mechanization in China make rapeseed production cost relatively high and the rapeseed industry lacking of market competitiveness.Suggestions such as,establishing a production protected area to protect the basic capacity of production of rape,developing rapeseed versatility to improve product value,improving rapeseed futures mechanism and promoting diversification of imports to resolve market risk are made in this study.Keywords：industry status quo;policy adjustment;development dilemma39|39|27<HTML><L-PDF> <Meta-XML>Updated：2024-02-27
- Abstract：In order to understand the research status of soil heavy metals in Beijing systematically,the development process and structural relationship of soil heavy metals research in Beijing are visualized with combination of mapping knowledge domain and traditional literature review,based on the Chinese literature on soil heavy metals studies in Beijing.The knowledge was then systematically mined and integrated using the framework of pressure-state-response.The results show that:1) Three stages of the soil heavy metals research in Beijing are conducted,large-scale basic investigation stage (before 1990),small-scale targeted research stage (1991-2000) and the integrated research (after 2001).The major groups including CHEN Tongbin,WANG Jihua,JI Hongbing,and SUN Danfeng,et al.,provide a large amount of data and theoretical support for Beijing soil heavy metal risk management;2) The accumulation state of soil heavy metal is related with industrial structure and land use,meaning different land use types have different accumulation characteristics.The probability of heavy metal potential risk falls into the safe category for most areas.The government has implemented a series of pollution reduction measures since 1990s leading to reduction in the accumulation rate of soil heavy metals in Beijing.Keywords：soil heavy metal;mapping knowledge domain;PSR framework;research status;Beijing31|14|1<HTML><L-PDF> <Meta-XML>Updated：2024-02-27
