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- Abstract：This study summarized and analyzed a total of 1 190,9 608 and 9 490 on-farm experiments with various rates of nitrogen (N),phosphorus (P) and potassium (K),conducted during 2005-2010 across major agro-ecological regions of rice production in China.Based on the data obtained and literature analysis,China rice production area was divided into 5 major agro-ecological regions and 9 sub-regions.Optimal rates of N,P and K and formulated optimized compound fertilizer for 8 sub-regions (excluding region Ⅴ) were estimated.The results showed that single rice yield in the Northeast China (regionⅠ),Yangtze River (region Ⅱ) and the South China (region Ⅲ) was 8.3-9.0 t/hm2,which was higher than that of single rice in Southwest China (region Ⅳ),and as well as that of early rice and late rice in the middle reaches of Yangtze River (sub-region Ⅱ-2) and the South China (region Ⅲ) (6.8-7.5 t/hm2).Nationally,the optimal rates of N across all the 8 sub-regions were N 172 kg/ha and ranged from 116 kg/ha in the cold sub-region in the Northeast China (Ⅰ-1) to 256 kg/hm2 in the lower reaches of Yangtze River sub-region (Ⅱ-3).The optimal rates of P were P2O571 kg/hm2 and ranged from 59 kg/hm2 for early rice and late rice in the South China (Ⅲ) to 84 kg/hm2 for single rice in the lower reaches of Yangtze River sub-region (Ⅱ-3).The optimal rates of K were K2O 62 kg/hm2 and ranged from 45 kg/hm2 for single rice in the cold sub-region in the Northeast China (Ⅰ-1) to 80 kg/hm2 for late rice in the plain and hilly sub-region in the South China (Ⅲ-2).A total of 11 regional special fertilizer formulae were designed for the 8 rice sub-regions,including 7 compound fertilizer formulae with high nutrient concentration and 4 with medium concentration.In general,more attention should be paid to Yangtze River region,where P fertilizer input should be increased slightly to build-up soil P,and the application of medium nutrient concentration special fertilizer should be enhanced.Keywords：rice;region;optimal nutrient rate;fertilizer formula10|10|24<HTML><L-PDF> <Meta-XML>Updated：2024-02-27
- Abstract：Water adaptability of winter wheat cultivars released in different decades was investigated by photosynthetic characteristics based on field experiment.The results indicated that:1) With cultivar evolvement,the cultivars released after 1970s had remarkably improved the highest and the lowest net photosynthetic rate (Pn),stomatal conductance (Gs),intercellular CO2 concentration (Ci),and transpiration rate (Tr) during reproductive stage compared with the cultivars released in 1950s and 1960s.The new cultivars also had longer high Pn duration than old cultivars;2) Cultivars released in 1990s and 2000s displayed no significant difference in Pn between irrigated and rain-fed conditions at booting stage,which were significantly higher than that of cultivars released between 1950s and 1980s under rain-fed condition.However,cultivars released in 1970s and 1980s under rain-fed condition exhibited the biggest decline of Pn compared with irrigated condition at every growth stage.On the contrast,cultivars released in 1950s and 1960s fed by rain exhibited increase of Pn by normal irrigation at flowering stage,which were significantly higher than that of cultivars released between 1970s and 2000s at both flowering and grain filling stages.The above results revealed that cultivars released in 1990s and 2000s exhibited high water adaptability before flowering,and cultivars released in 1950s and 1960s showed high adaptability after flowering,while the cultivars released in 1970s and 1980s were sensitive to water deficient during the whole reproductive stage.Keywords：winter wheat;cultivar evolvement;photosynthetic characteristics;water adaptation ability5|8|2<HTML><L-PDF> <Meta-XML>Updated：2024-02-27
- Abstract：Split-plot design was carried out to study the effect of planting density and nitrogen application amount on growth、yield and quality in malting barley named Ganpi 4.The main plot was planting density (D) at three levels,3.25,3.75 and 4.25 million/hm2,marked D325,D375,and D425,and subplot were five N application rate(N) level at 0,75,150,225 and 300 kg/hm2,marked N0,N75,N150,N225 and N300.The results showed that:The effect of density on the content of nitrogen,phosphorus and potassium of plant,SPAD value of flag leaf,the length of peduncle and main quality traits were not significant,but all significantly affected plant height,stem diameter,leaf area of the flag leaf and ear bearing tiller percentage.Plant length,stem diameter and leaf area of the flag leaf were all significantly positively correlated with N application rate.The nitrogen content of plant,spike length,grains per spike,seed setting rate,grain yield and protein content showed a significant increase with the increase of nitrogen application rate.However,the spike number,spike rate and 1000-grain weight increased first and then decreased with the increase of N application rate,the starch content showed significant decreased with the increase of nitrogen application rate.Planting densities and N application rate of interactions only has remarkable effect on plant height,stem diameter,earing rate and spike grain number,but were not significant effects on the rest of the indicators.The stepwise regression equations between grain yield (Y), crude protein content (Y1) and planting density (X7),N application rate (X8) were:Y=12.627+0.007 X8,Y1=-27 161.600+161.645 X7-0.216 X72-0.003 X82+0.015 X7×X8.Considering the indicators,when the Ganpi 4 planting density of 3.85 million/hm2,N application rate of 124.71 kg/hm2,which can improve both the yield and the quality at the same time.Keywords：barley;N application;density;yield;quality2|8|8<HTML><L-PDF> <Meta-XML>Updated：2024-02-27
- Abstract：To study the effects of methanol extracts of crops tissues and their roots exudates on induction the sunflower broomrape seeds germination,wheat (Triticum aestivum L.),broad bean (Vicia faba L.) and oil seed rape (Brassica napus var.annua) were planted by pot culture and water culture,respectively.The result indicated that both the root methanol extracts and exudates of wheat and broad bean were able to stimulate the germination of sunflower broomrape seeds.Methanol extracts of wheat root induced the highest seed germination rate (41.5%).The methanol extracts and the roots exudates of broad bean were also able to stimulate the germination of sunflower broomrape seeds,and extractions of roots exudates of broad bean induced higher germination rate (41.1%).In conclusion,extracts of wheat and broad bean roots may contain germination stimulants to induce the germination of sunflower broomrape seeds and might be used as trap crops for sunflower broomrape control.7|9|2<HTML><L-PDF> <Meta-XML>Updated：2024-02-27
- Abstract：Based on 7 new restorer lines,4 new male sterile lines and a classical male sterile line G46A,15 hybrid combinations were established by hybridization.The main component factors of yield per plant was found by analyzing the relationship of yield per plant and the economical traits in F1generation and heterobeltiosis of yield in F1 was also calculated.Heterozygous rate of molecular markers of F1 was calculated by selecting 39 SSR markers linked to functional genes.Models were built with different factors and were compared with each other to select the best one.The result showed that the 1 000 grains weight and filled grains per panicle were the main factors of yield per plant of rice in Sichuan Province.The model which was built with the 1 000-grain weight and filled grains per panicle are more reliable than the model built with the 1 000 grains weigh,the percentage of seed setting,the filled grains per panicle and the number of effective panicle.As the average annual sunshine time is short in Sichuan Province,The effect of the number of effective panicle on yield is not significant.Therefore,the reliability of model was improved by select the molecular markers closely linked with functional genes excluding the number of effective panicle.The model built to predict heterosis of rice yield per plant of F1 provides guidance for parent selection in rice breeding.Keywords：hybrid rice;heterosis;molecular marker;path analysis;yield per plant0|7|0<HTML><L-PDF> <Meta-XML>Updated：2024-02-27
- Abstract：Salinity stress is one of the major factors affecting plant growth.The development of high efficiency Agrobacterium mediated transgenic techniques has greatly accelerated the application of transgene in potato.The ORF of vacuolar Na+/H+ antiporter gene (AlNHX) was transferred into potato through Agrobacterium transformation.Factors affecting the transformation frequency (concentration of antibiotics and Agrobacterium,co-cultivation time) were optimized.The results indicated that:The optimum concentration of Agrobacterium tumefaciens is OD600=0.6,the optimum infection time 5 min,the adequate time of co-cultivation is 2 d,the optimum concentration of cefotaxime for potato transformation is 400 mg/L.Transgenic plants confirmed by PCR could survive in the medium containing 0.7% NaCl,while the wild-type plants failed to grow and the contents of Na+,K+and K+/Na+ratio in transgenic potato were all higher than in wild-type potato under salt stress.These results demonstrated that the salt tolerance of potato can be improved by introducing Na+/H+ antiporter gene through Agrobacterium transformation.Keywords：potato;Agrobacterium transformation;Na;/H;+;antiporter gene;salt stress;salt-tolerance0|11|2<HTML><L-PDF> <Meta-XML>Updated：2024-02-27
- Abstract：To explone the reason why the sugar in fruit and P,K in leaf were increased in apple,20-year-old Fuji/Baleng and 1-year-old Fuji/SH6 were chosen as experimental materials,the former was treated with leaf spraying 10 g/L CaCl2 at fruit set stage (10 days after full bloom) and 1.05 g/L Na2B4O7at rapid fruit growth stage (85 days after full bloom).Minerals and soluble sugars in leaves and fruits,photosynthesis and 6-phosphate-sorbitol dehydrogenase (S6PDH) activity were analyzed after foliar application of Ca or B.The latter one was treated with leaf daubing 10 g/L CaCl2and 1.05 g/L Na2B4O7,photosynthesis and minerals in leaves were analyzed afterwards.The results showed 1) Leaf spraying Ca or B resulted in a significant increase in S6PDH activity from 85 days after full bloom,accompanied with the increase of leaf sorbitol concentrations.Subsequently,fruit fructose and total soluble sugar contents were significantly increased at later growth stage.2) Net photosynthesis rate,transpiration rate and stomatal conductance of B/Ca-applied-leaves were significantly increased.3) Mn,Zn,Cu and K contents of potted apple trees after the application of CaCl2 and Na2B4O7·10H2O were significantly increased.The results indicate that leaf spraying of Ca and B can induced a dramatic increase in sugar content of fruit by improving apple leaf photosynthesis.The increase in leaf mineral elements levels after foliar application of Ca or B may be associated with the increase of transpiration.Keywords：calcium;boron;apple;photosynthesis;soluble sugar2|8|2<HTML><L-PDF> <Meta-XML>Updated：2024-02-27
- Abstract：The transcriptomes of Eucommia ulmoides Oliv. kernels of 70 and 160 d after flowering in varieties ‘Huazhong 6 and 10’ were sequenced.The transcriptome data was assembled and classified by function,and microsatellites characteristics from obtained unigenes and analyzed.The Illumina HiSeqTM 2000,a new generation of high-throughput sequencing technology was used to sequence the transcriptomes of kernels of assembled by software Trinity.The unigenes were annotated according to Nr,GO,COG and KEGG category by BLAST searches.A total of 72 791 399 clean reads fragment including 14 702 548 161 bp in sequence information were generated,and then de novo assembly generated a total of 96 469 unigenes with an average length of 690 bp,which contains 66.56 Mb in sequence information.Among them,49 856 unigenes accounted for 51.68% were annotated by BLAST searches.All 38 983 annotated unigenes according to GO were divided into three categories (cellular components,molecular function and biological processes) of 56 branches by gene ontology;14 796 annotated unigenes based on COG were grouped into 25 functional categories;KEGG pathway analysis presented that 11 260 annotated unigenes were divided into 117 classes according to its function.There were 9 621 complete SSR located in 96 469 unigenes,which accounted for 84.14% of the total SSR.The complete SSR included 55 frequent motifs,and the highest repeat of complete SSR type was A/T (4 597),following by AG/CT (2 597)、AT/AT (439).The characteristics of SSRs can provide useful information for the analysis of genetic polymorphism and map structure in E.ulmoides.4|8|1<HTML><L-PDF> <Meta-XML>Updated：2024-02-27
- Abstract：In order to study math morphological features as moth right forewing classification based on feasibility,the eccentricity,sphericity,roundness,rectangularity,elongation,lobation and movement invariants including Hu1 and Hu2,13 math morphological features using BugShape software,treating the right wing of 20 species of Noctuidae Noctuidae (each 20) were extracted as the research object[1].The mean values of 13 mathematical morphologies were analyzed by variance analysis.The results showed that the difference between the 13 groups was very significant (P<0.01).They could be used as the basis for classification of Noctuidae.10 indicators of which were important indicators of the basis of classification[1-2] and the order of their importance was rectangularity > eccentricity > roundness > Hu1 > Hu4 > sphericity > elongation > lobation > Hu6 > Hu7. The accuracy rate was 84.3% after using discriminant function and hierarchical clustering.The genetic relationship of cluster analysis was consistent with the results of traditional taxonomy.The classification of Noctuidae could base on the mathematical morphology of the right front wing of moth.Keywords：Noctuidae;right front wing;math-morphological character;classification and identification0|8|4<HTML><L-PDF> <Meta-XML>Updated：2024-02-27
- Abstract：To estimate the feasibility of applying steam explosion as the processing technique of fibrous feedstuff,chemical analysis,in vitro gas production and model prediction were adopted to evaluate the effects of steam explosion.The results showed that:Steam explosion increased(P<0.05) the dry matter and ash of the straw,while decreased(P<0.01) the content of neutral detergent fiber (NDF);The changes of crude protein,acid detergent fiber (ADF) and lignin (ADL) among the three straw were inconsistent;Steam explosion processing eliminated(P<0.01) the lag time of in vitro fermentation and increased(P<0.01) the rate of gas production (c),while decreased(P<0.01) the asymptotic gas production;Moreover,steam explosion exerted a better effect on the gas production of corn straw and rice straw than that of wheat straw.Consequently,the relative forage value(%) and dry matter intake (%,BW) of the straw were increased(P<0.01) with steam explosion.In conclusion,the physiochemical property of the straw was altered,substantially improved the quality of straw feed.0|7|5<HTML><L-PDF> <Meta-XML>Updated：2024-02-27
- Abstract：To investigate effects of dietary supplementation of Bacillus magaterium 1259 on eggshell quality and serum parameters of laying hens,a total of 240 Hy-line brown laying hens aged 65 weeks were randomly divided into 2 groups with 6 replicates per group and 20 hens per replicate.Experimental groups were control group (basal diet) and treatment group (basal diet added 2×106 cfu/g B.magaterium 1259).After feeding for 4 weeks,the eggshell quality and serum biochemical indexes were detected in each 10 days respectively.The results showed that:1) Egg broken rate significantly decreased in treatment group (P<0.05).And the weight and strength of eggshell were also significantly higher than the control group (P<0.05).Egg broken rate also significantly increased with time;2) The comparative content of eggshell elements carbon and nitrogen in treatment were significantly higher than the control group (P<0.05),while oxygen,magnesium,phosphorus,calcium were significantly lower than the control group (P<0.05);3) The concentration of carbonic anhydrase in control group was significantly higher than the treatment (P<0.05),while calcium were significantly lower (P<0.05);4) Crystal microstructure of eggshell was improved and cracks of eggshell surface were reduced in treatment group.Taken together,diets added with B.magaterium 1259 improved eggshell quality of laying hens in the late period.Keywords：laying hens;Bacillus magaterium;eggshell quality;eggshell elements;serum indexes4|8|0<HTML><L-PDF> <Meta-XML>Updated：2024-02-27
- Abstract：To explore non-chemical weed control management which is effectively and suitable for Tibetan medicine cultivation,the weed species,density,height,coverage and above-ground biomass under different weed control measures (no weeding,CK;manual weeding,MW;mulching black film weeding,MF) were investigated in the field of Pterocephalus hookeri artificial cultivation.The weed control effect of MW treatment and MF treatment were also studied.The results showed that:MW treatment recorded the most number of species which is 2 and 12 higher than that of MW and CK,respectively;From the aspect of weed density,the mean height and total above-ground biomass,weed density,mean height and total above-ground biomass of CK were 2.00,1.48 and 3.80,times higher than that of MW,and 4.19,3.77 and 61.21 times greater than that of MF,showing a significant difference (P<0.05);From the aspect of functional group abundance,the most abundance of stress functional group was in the CK.The most abundance of Disturbance functional group was in the MW.And the most abundance of competitiveness functional group was in the MF;As for ecological niche characteristics of weeds and P.hookeri,the low niche breadth with interspecific overlap showed in MW.The great niche breadth with interspecific overlap occurred in CK.The great niche breadth with low interspecific overlap was found in MF.And the niche breadth of P.hookeri among treatments,in turn,were MF > MW > CK;From the aspect of the yield of P.hookeri,MF treatment were 1.86-fold and 3.53-fold greater compared to MW and CK (P<0.01).In conclusion,MF treatment achieved outstanding weed control effect with the greatest yield,followed by MW.However,weed had seriously impact on the yield of P.hookeri.Keywords：Pterocephalus hookeri;manual weeding;mulching weeding;functional group;niche;yield0|8|1<HTML><L-PDF> <Meta-XML>Updated：2024-02-27
- Abstract：Soil and water erosion in development and construction projects of dry gravel desert area are relatively serious.Xinjiang Cala Beili region was selected as study object.Precise sand samplers and anemometers were set on original surface and destroyed surfaces to collect data.The grading of sediment particles were conducted by using soil sieve SPSS statistical analysis.The results show that:Destroyed surfaces increased the possibility of soil wind erosion,and repeated rolled surface and spoiled surface were the main wind erosion area;The sediment discharge was mainly concentrated in 30 cm height and the mainly erosion practical size were between 0-500 μm in this area;With the increase of height,sand particle size and sediment discharge decreases.The sediment discharge decreased with height by exponential function;With the increase of height,the characteristics of soil wind erosion near the surface,were affected by nature of the underlying surface and the impact on sediment discharge and particle size mainly occurs in near-surface 30 cm and 50 cm,respectively.The possibility of soil wind erosion and structure of sand flow underlying different surface in development projects located in Cala Beili of Xinjiang exhibited different characteristics.Keywords：wind erosion;underlying surface;sediment discharge;sediment particle size;development projects of Cala Beili0|7|0<HTML><L-PDF> <Meta-XML>Updated：2024-02-27
- Abstract：Based on the daily maximum temperature and average temperature data of the 17 stations in Fujian Province during 1960 to 2013,using the trend analysis,IDW spatial interpolation technology,Mann-kendall mutation test,Morlet wavelet analysis,Pearson correlation analysis and Hurst exponent,The temporal and spatial evolution law and its development trend in the future of extreme temperature events in Fujian Province were analyzed.The results showed that:1) In recent 54 years,the days of annual extreme high-temperature increased while the days of annual extreme low-temperature decreased.The intensity of extreme temperature events and annual temperature extremes displayed increasing trend;2) The spatial distribution of various indexes of extreme high-temperature event was from the southeast coast to the Inland Northwest gradually increasing,while the extreme low-temperature were decreased.In addition,with the increase of altitude each index value of extreme high-temperature event decreased;3) There was a high correlation between extreme temperature events and annual average temperature,and the correlation with days of extreme temperature events stayed the highest;4) The Hurst index indicated that the future of extreme high-temperature days,strength,and annual maximum temperature,extreme low-temperature strength and annual minimum temperature are going to be increased,while the extreme low-temperature days showed a downward trend,the trend of warmer winters is growing clear.Keywords：climate change;extreme temperature events;spatial temporal distribution;hurst exponent;Fujian Province9|10|2<HTML><L-PDF> <Meta-XML>Updated：2024-02-27
- Abstract：The impacts of concentration of acid,alkali,salt and the temperature on the growth of Bacillus amyloliquefaciens L-S60 were investigated through single factor experiments.The biological features of L-S60 were studied and the solid-state fermentation condition of this strain was optimized in this study.The results showed that:The resistance of B.amyloliquefaciens L-S60 to acid and alkali is robust;the colony number of L-S60 dropped significantly when the salt concentration exceeded 10%;there was no significant difference of the colony number of L-S60 when the temperature is under 80℃.Strain L-S60 could produce amylase,protease and cellulose.It also showed strong inhibitory effects on a variety of pathogenic fungi.In order to make B.amyloliquefaciens L-S60 a good bio-fertilizer,the solid fermentation conditions and medium composition were also explored.The optimum temperature was 35℃,the inoculum concentration was 30% and the ratio of material and water was 1:0.45.We chose 40% as the amount of bottling and 42 h as the fermentation time.The best solid fermentation medium contained 53% of peanut shell powder,35% of wheat bran,and 12% of cottonseed meal.Finally,extra nitrogen source (3.00 g/kg),carbon source (2.00 g/kg),and inorganic salt (MgSO4.7H2O 0.20 g/kg) were added in the solid state fermentation medium.Under this condition,the number of B.amyloliquefaciens colonies L-S60 reached 2.42×1010 CFU/g.Keywords：Bacillus amyloliquefaciens;biological characteristics;solid-state fermentation;the number of colonies1|9|12<HTML><L-PDF> <Meta-XML>Updated：2024-02-27
- Abstract：A new modified electrode was prepared by using carbon nanotube and grapheme to detect the content of flavonoids effectively and conveniently.The electrochemical performance of modified electrode was examined by using potassium ferricyanide solution and the result showed that modified it displayed better electrical activity.In the Brittion-Robinson buffer solution (pH 4.5),the peak current of differential pulse voltammetry (DPV) for quercetin rose as its concentration increased,and a good linearity was observed over 1×10-7~1×10-5 mol/L of Brittion-Robinson buffer solution with a detection limit of 2×10-8 mol/L (S/N=3). The Linear regression equation was ipa=-1.447c-0.325 (ipa:A,c:mol/L,r=0.993).Modified electrode showed advantages such as simple detection,high sensitivity and low detection limit.By determining the quercetin content of buckwheat tea with this method,the reliability and accuracy of the new modified electrode it was proved successfully.Keywords：carbon nanotube;graphene;modified electrode;differential pulse voltammetry;quercetin2|8|0<HTML><L-PDF> <Meta-XML>Updated：2024-02-27
- Abstract：Aiming to the problem that the parameter selection on the CFD method has a greater impact on the simulation precision for labyrinth flow path cylindrical emitter internal flow.An orthogonal test of three factors and four levels were carried out.Factors were the size of grid cell (0.2,0.15,0.10 and 0.07 mm),the selection of turbulence model (Reynolds Stress Equation Model,Standard k-ε Model,RNG k-ε Model and Realizable k-ε Model),the treatment of Near-Wall function (Standard Wall Function,Non-Equilibrium Wall Function,Enhanced Wall Function and Scalable Wall Function).By comparison of the deviation between CFD simulation values and measured values under each experimental condition,a higher accuracy simulation method and further optimization of labyrinth flow path was put forwarded.The results show that when the grid size is 0.07 mm,the turbulence model is Reynolds Stress Equation Mode and the near wall treatment function is the Scalable Wall Function,the simulation accuracy is the highest.Keywords：labyrinth emitter;CFD simulation;orthogonal analysis;Near-Wall Function7|10|2<HTML><L-PDF> <Meta-XML>Updated：2024-02-27
- Abstract：The structural breaks of China and US soybean futures markets price was investigated by using Bai-Perron test,furthermore, characteristic of the structural break of price relationship variation and its influencing factors between China and US soybean futures markets were analyzed by using the cointegration test,Granger causality test and impulse response function in stages.The main conclusions are as follows:1) Overall,the price of China and US soybean futures markets are cointegrated in the long run,and the US soybean futures market price has leaded China soybean futures market price;2) The price of China and US soybean futures markets has five structural breaks,and before and after some breaks,the correlation of two markets price has changed.3) Significant events including global economic crisis,sharp fluctuation of oil price and change of market control policies have affected the price relationship between China and US soybean futures markets.Keywords：soybean futures;Bai-Perron test;structural breaks;price relationship0|8|2<HTML><L-PDF> <Meta-XML>Updated：2024-02-27
- Abstract：Based on the characteristics of the production and trade of beef,the international competitiveness of Chinese beef products from the costs,prices and international competitiveness indexes are analyzed.The influencing factors of the international competitiveness of Chinese beef products(excluding Hong Kong,Macao and Taiwan) are investigated by using gravity model.The production of beef is really big and trade is small;The trade gap is widened year by year;Chinese beef products do not have international competitiveness and domestic market is in tight balance between supply and demand,and GDP of export objects,whether landlocked countries and the establishment of CNFTA are the main factors influencing the export of Chinese beef products;the impact of free trade on cattle industry in China must be focused in the future;then there are several analysis corresponding conclusions and countermeasures.Keywords：beef;international competitiveness;export;influencing factors;gravity model;heckman two-stage model4|7|4<HTML><L-PDF> <Meta-XML>Updated：2024-02-27
- Abstract：In order to improve the efficiency of the popularizing agricultural technology,a binary Logistic model was used to analyze key factors affecting farmer's willingness to adopt resource-saving and environment-friendly technology through random sampling strategy of the farmers in grain production of Liaoning,.The results showed that:1) The age of household head;farmer's village officials;degree of chronology and decentralization of land,training received;multiple accesses to technology information have significant impact on the farmers' choice willingness on modern agricultural water-saving irrigation technology;2) Farmer's as village officials;training received;multiple access to technology information;extension service agricultural science and technology had significant impact on the farmers' choice willingness on soil testing and fertilizer recommendation technology;3) Training received;extension service on agricultural science and technology,production and management scale displayed significant impact on the farmers' choice willingness on straw returning technology.The empirical analysis showed that under the conditions of other variables were controlled,the proportion of the technology in the first two technology adopted by rice growers was 13.7%,which is 6.8% higher than that corn growers respectively.And the proportion of the straw returning technology adopted by rice growers is 22.4% lower than that of corn growers.Suggestions were proposed to increase training for farmers and widen the spread channel of the two-oriented agricultural technology to promote the efficiency of the popularizing agricultural technology.Keywords：two-oriented agricultural technology;technology adoption;Binary Logistic model;Liaoning Province0|9|13<HTML><L-PDF> <Meta-XML>Updated：2024-02-27
- Abstract：Taking the rice industry with higher development level of agricultural production services as an example in China,the current situation of agricultural production services is summarized,then its impacts on land scale management is analyzed from the perspective of farmer's land scale management behavior by using household survey data from fixed observation point of rice industry comprehensive experiment station of China Agriculture Research System.The results show that the development level of pre-production processes is higher than that of in-production and after-production processes;the agricultural production services affect farmer's land scale management behavior significantly,where in-production and after-production processes affects stronger;the effect of agricultural production services on farmer's land scale management behavior differs,for those with large scale,the effect is more significant.Besides,individual character,production and managment features also affect farmer's land scale management behavior significantly.Keywords：agricultural production services;land scale management;rice planting;farmer's behavior1|7|6<HTML><L-PDF> <Meta-XML>Updated：2024-02-27
- Abstract：To explore whether there is a spatial relationship between fiscal expenditure supporting agriculture and farmers' income growth,this study uses spatial econometric method to measure the spatial relationship of fiscal expenditure supporting agriculture and farmers' income growth in the city state of Sichuan.The results show that:Farmers' income displays obvious characteristic of spatial agglomeration,and its spatial dependence and heterogeneity exhibit the trend of expansion;The effect of fiscal expenditure supporting agriculture on farmers' income changes from negative spatial spillover into positive spatial spillover;The growth of rural economy and agricultural development has a positive effect on farmers' income growth.Policy suggestions are put forwarded as follows:Paying attention to the positive effect of spatial spillover in farmers' income growth;Increasing the fiscal expenditure supporting agriculture,and improving funds using efficiency;Promoting the development of rural economy,and strengthening the agricultural total production value.Keywords：fiscal expenditure supporting agriculture;farmers' income growth;spatial econometric model;spatial correlation3|7|0<HTML><L-PDF> <Meta-XML>Updated：2024-02-27
- Abstract：Aiming to comprehensively discuss the research trend of agriculture water issues in North China Plain,point out the study frontiers,hot topics,and improve research efficiency,published articles (the number of published articles,major journals,and cited times etc.) in recent 35 years based by bibliometric methods were analyzed based on ISI Web of Science and CNKI database.Results showed that:1) Agricultural water-saving technology and its basic theories are still the focus of current research among six research directions;2) Model simulation, climate change and water resource status are three new research hot topics;3) Among Center for Agricultural Resources Research,IGDB,CAS and Institute of Geographic Sciences and Natural Resources Research,CAS has occupied leading position in this research filed currently.Keywords：north China plain;bibliometric method;water issues;research trend;CNKI datebase;SCIE datebase10|7|0<HTML><L-PDF> <Meta-XML>Updated：2024-02-27
