the Decision Support for Agrotechnology Transfer(DSSAT) model was a worldwide crop model, and crop accurate simulation of phenology was the premise to realize other functional simulationsthe objective of this study wa...
详细信息
ISBN:
(纸本)9783319483535
the Decision Support for Agrotechnology Transfer(DSSAT) model was a worldwide crop model, and crop accurate simulation of phenology was the premise to realize other functional simulationsthe objective of this study was to attempt to calibrate the parameters of wheat phenology coefficients,including cultivar and ecotype coef ficients, and develop the winter wheat phenology coefficients of Beijing areaTo achieve this goal, field surveys of 7 years in wheat growing seasons in Beijing were carried out during 2005–2012the trail-and-error method and GLUE method were used to calibrate the phenology parameters with4 growing seasons of 05/06, 06/07, 07/08 and 08/09three growing seasons, 09/10, 10/11, and 11/12 were used for validation, and the results showed good agreements between observed date and predicted *** RMSE of validation data for TS, BT, HD, AN, and MA were 1.63 d, 2.45 d,3.16 d, 1.83 d, 3.56 d, respectivelytherefore, the calibrated parameters could be used to monitor winter wheat phenology, and could be used for other research as the basis phenology parameters of Beijing area.
Withthe rapid progress of information technology,more and more people utilize high technology to boost the fast development of the national *** the project of agricultural science and technology to farmer was put int...
详细信息
Withthe rapid progress of information technology,more and more people utilize high technology to boost the fast development of the national *** the project of agricultural science and technology to farmer was put into practice by Ministry of agriculture in 2005,212 representative counties have been set,200,000 typical households have been added,and 4 million peasants have enhanced production and increased *** to the criterion of Software Engineering,the article collected the information of Agricultural science and technology to farmer and the geography information of all villages and towns in HUA county,designed the system structure of Agricultural science and technology to farmer,implemented the information query and management,and realized the special topic analysis to the information distribution by tools of OOP,GIS components and network database,integrating GIS and MIS *** system has been applied in HUA county,and facilitated information management,analysis and decision-making to the agricultural science and technology to farmer.
Waterlogging and shading result from continuous rain are the main meteorological disasters for wheat(Triticum aestivum L.) productionIn order to evaluate the effects of waterlogging and shading on yield components of ...
详细信息
ISBN:
(纸本)9783319483535
Waterlogging and shading result from continuous rain are the main meteorological disasters for wheat(Triticum aestivum L.) productionIn order to evaluate the effects of waterlogging and shading on yield components of winter wheat(both independent and combined), pot experiments were conducted using two representative cultivars in local, Ningmai 13 and Yangmai 13In total, 4treatments, including CK(control), WA(waterlogging alone), SA(shading alone) and WS(both waterlogging and shading) were established withthree duration(5, 10 and 15 d, respectively) at jointing and grainfilling *** showed that, in the case of non-stressed environment, Yangmai 13 got a better production compared with Ningmai 13(grain yield per plant was 14.25 g and 15.97 g for Ningmai 13 and Yangmai 13, respectively)However, compared with Yangmai 13, Ningmai 13 got a better yield under stresses at jointing stage, while a similar yield was observed when stresses are at grain-filling *** comparing wheat yield and its components, the negative effects of the stresses showed a tendency that WA > WS > SA at jointing stage, whereas WS > WA > SA at grainfilling stagethe result demonstrated that shading had a compensative effect on waterlogging at jointing stage while an addictive effect at grainfilling stageReduction of wheat production caused by continuous rain depended on the growth stagesEffect of growth stage on grain yield should be considered when waterlogging and shading packages of wheat growth model were established.
Data collected by measuring farmland environmental indicators are vital sources of agricultural *** sensor networks(WSNs)have been employed to acquire stable and real time farmland environment ***,recognized as one of...
详细信息
ISBN:
(纸本)9783642272806
Data collected by measuring farmland environmental indicators are vital sources of agricultural *** sensor networks(WSNs)have been employed to acquire stable and real time farmland environment ***,recognized as one of the latest development trends,recently attracted widespread attention and application due to their relative economy,stability,and *** this study,based upon a large amount of WSNs-obtained data,Microsoft Visual Studio 2005 and ESRI ArcGIS Engine 9.3,amongst others,were utilized to develop a farmland test data processing system,resolve information storage and utilization problems and conduct system *** data processing software consisted of four modules:data receiving conversion,database maintenance management,data browsing analysis and the generation and application of data spatialization ***,the data receiving conversion module was mainly responsible for converting raw data acquired by WSNs into standard database outputs,including the automatic reception of measured value,error correction and alerting the observer to abnormal *** Database maintenance management module's primary functions were the generation and maintenance of metadata generated from stored data,authentic data enquiry,display and *** generation and application of data spatialization products module was principally for the spatial expansion application of measured data,including space-time interpolation and *** system underwent pilot scale testing and improvement at the same time as undertaking the processing of real data collected by WSNs deployed throughout the Hebi test *** observed results revealed that the system was able to complete real-time conversion and management of field measured *** addition,it has several advantages,such as,excellent stability,perfect functionality and a convenient human- machine interface.
Landsat ETM image located in Yucheng city in 2002 was interpreted by RS image extraction technology and classi fication methodMoreover,landscape ecology theories were applied as well as Arc GIS and Fragstats4 to choos...
详细信息
ISBN:
(纸本)9783319483535
Landsat ETM image located in Yucheng city in 2002 was interpreted by RS image extraction technology and classi fication methodMoreover,landscape ecology theories were applied as well as Arc GIS and Fragstats4 to choose the reasonable landscape indices including Contagion Index(CONTAG), Patch Density(PD), Landscape Shape Index(LSI), Perimeter Area Fractal Dimension(PAFRAC), Shannon's Diversity Index(SHDI), Shannon's Evenness Index(SHEI)the study results showed that correlation between the landscape index was signi ficant at the 0.01 con fidence level, the relationship rule was revealed between ecological index based on statistics modelthe typical scale effect was selected, including 5 m, 10 m, 15 m, 20 m, 25 m, 30 m, 40 m,50 m, 60 m, 70 m, 80 m, 90 m, 100 m, 110 m, 120 m, 150 m, 180 m and210 mthe series results were clarified by PD, LSI, PAFRAC, CONTAG,SHDI and SHEI in response to the different scales, or 18 different scalesthe detailed results showed that the decreasing trend was presented from 5 m scale to 210 m scale for each indexFurthermore, we also analyzed the scale effects for different landscape indexFinally, based on image by the change of LSI,PAFRAC, SHAPE-MN and AI on 30 m pixel scale, we emphatically analyzed the LSI, PAFRAC, SHAPE-MN, AI of 12 landscapesFurther, according to the new classi fication, for the 12 landscapes in Yucheng city, they are Arable-land,Grassland, Traffic and Transmission Land Use, Residential land, Public management and service land, Commercial service land, Garden plot land, Mine and storage land, Woodland, Water and water facility land, Special land and other land we explored and explained the ecological signi ficance of different landscapes in the case city, Especially, landscape sensitivity, fragmentation and complexity of landscape spatial pattern and diversity.
the impact of high temperature on rice yield has been evaluated by using simulation models or conducting experiments with controlled high temper‐ature and sowing timesIn this paper, observed daily maximum temperature...
详细信息
ISBN:
(纸本)9783319483535
the impact of high temperature on rice yield has been evaluated by using simulation models or conducting experiments with controlled high temper‐ature and sowing timesIn this paper, observed daily maximum temperature data at 6 representative stations in the Middle-Lower Yangtze River Valley(MLYRV)from 1984 to 2013 was analyzed to examine the daily relationship between rice seed setting rate(RSSR) and the maximum temperature by using data from the mid-season late-maturing indica rice variety regional experiments conducted in field conditions at the same representative stations from 2004 to 2011(totally using 615 samples and 69 rice varieties)the results indicated that RSSR appears to be sensitive to high temperature from 36 days before full heading to 4 days before full heading(withthe significance of the negative correlation between RSSR and maximum temperature in this period above 99 % confidence level) and the most sensitive at about 14 days before full heading(near the meiosis phase),indicating that for the mid-season late-maturing indica rice variety in the MLYRV, more attention should be paid to the high temperature damage at the meiosis stageAccording to the extracted high temperature sensitive period, stat‐istical forecast models were established to predict the regional rice high temper‐ature damage in the MLYRV by using atmospheric circulation indices in preceding 12 months with a correlation coefficient between the predicted and observed heat stress index of 0.95 and a normalized root mean square error(NRMSE) of 28.4 %In addition, a high temperature-induced rice sterility simu‐lation model was also used to quantitatively forecast the meiosis phase high temperature influence on rice at the site scalethe NRMSE of the simulated and forecasted relative seed setting rate was 4.74 % and 2.84 %, respectivelyIn conclusion, the presented prediction models were useful to improve the rice hightemperature damage forecast and were expected to be helpful to rice high te
the traceabibty system of navel orange can ensure the quality and safety due to the whole process control from orchard to *** on the whole process of navel orange is the foundation and premise of building the traceabi...
详细信息
ISBN:
(纸本)9783642272806
the traceabibty system of navel orange can ensure the quality and safety due to the whole process control from orchard to *** on the whole process of navel orange is the foundation and premise of building the traceabibty *** on the analyses of whole food chain of navel orange from origin to market,HACCP is used to evaluate the risk and latent risk of the food chain of navel orange:planting,harvesting,processing,packing,transportation and sale,the critical control point of navel orange were ***,the traceabibty information of the navel orange traceabibty is determinate finally.
暂无评论