China,with wide grassland areas of the second rank throughout the world,is faced with a severe challenge on how to manage its vast and degenerating/degenerated *** and network technologies are more and more widely app...
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China,with wide grassland areas of the second rank throughout the world,is faced with a severe challenge on how to manage its vast and degenerating/degenerated *** and network technologies are more and more widely applied in grassland production,research and education,which is just a greatly encouraging *** achievements have been made in grassland management decision support system(GMDSS) research in developed countries at present,but there is still a long way to obtain a great development for developing countries,such as *** paper reviewed the research progress and current situation in the GMDSS research and application in *** models and empirical models are still hugely focused on the corresponding research fields in China,but the integrated GMDSS has not been well ***,Chinese scientists must develop the integrated models from the existing models,and accordingly sinicize the GMDSS of models used in the developed countries for availably *** the other hand,there is a same direction of research and development about the GMDSS not only for developed countries but also for China,which is going to be combined with internet,3S(GIS,RS and GPS) and virtual technology.
Different crops,seasons,greenhouse's structures and planting area need different concentration of carbon dioxide which fertilized in *** the concentration of carbon dioxide accurately in greenhouse is very importa...
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Different crops,seasons,greenhouse's structures and planting area need different concentration of carbon dioxide which fertilized in *** the concentration of carbon dioxide accurately in greenhouse is very important to fertilize carbon economically and reasonably Concentration of carbon dioxide measuring equipments were often used in chemical industry and environment fields,these equipments are not suitable for greenhouse's environment and had many disadvantages such as high price,high power consumption and low anti-interference *** on the research of carbon dioxide measuring equipment,this design took part of Non Dispersive Infrared(NDIR) carbon dioxide sensor produced by GSS,embedded Zigbee module provided by Jennic,smart calibration program and solar panel charge *** results showed that the accuracy was±30ppm,average power consumption was2 mW,high consistency,response *** design can change the present of carbon dioxide measuring instrument hard to popularize,and make carbon dioxide fertilization accurately.
Keeping water eco-environment health and virtuous circle of lake-wetland,and letting lakes recuperate and reproduce has become a common view all over the *** a great deal of research results were obtained,such as lake...
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ISBN:
(纸本)9783642272776
Keeping water eco-environment health and virtuous circle of lake-wetland,and letting lakes recuperate and reproduce has become a common view all over the *** a great deal of research results were obtained,such as lake-wetland ecosystem management and eco-hydrological mechanism of eco-environment evolution,there are few researches about comprehensive analysis on evolution trend and driven mechanism of lake-wetland water ***,the biggest grass-type lake-wetland in North China,was chosen as the research object in this *** on the long-term and field observations of water environmental quality and analysis for remote sensing images of water ecological landscape pattern,the evolution trend and driving mechanism for water eco-environment of Baiyangdian in the past 60years have been studied *** results showed that the average annual water level fluctuated greatly with a decreasing tendency as a *** 1974 and 2007,there was a general pattern of land use types,which the emergent plants,water body and cultivated land were the main,and the residential area,forest land,grass land and unused land were distributed as flower arrangement *** the periods,the water body and emergent plants areas were decreased respectively by 28.7%and 20.8%,while the cultivated land areas were increased by 69.7%.the main pollutants(NH4+-N,CODMn,BOD5,TP,and TN)concentrations in Baiyangdian Lake were changed greatly with spatiotemporal variation and the pollutant concentrations were increased *** the three polluted regions(north zone,south zone,andmixed zone),the north zone was polluted most *** main pollutants concentrations were fluctuated obviously over a year,and the pollution was more serious in summer of normal and dry years,while the pollution was serious at the beginning of summer flood in wet years,and then became *** last,the evolution trend and driven mechanism of water eco-environment of Baiyangd
In recent years,there are many food quality problems have *** they have had a serious effect on people's physical and mental *** quality tracing of livestock products have arrested the intensively attention of the...
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In recent years,there are many food quality problems have *** they have had a serious effect on people's physical and mental *** quality tracing of livestock products have arrested the intensively attention of the society of different *** NingXia,which is as the main living place of Hui National people,the industry of Halal beef and mutton is one of the leading industries for the development of local *** on the requirement of agricultural informatization of NingXia and other similar regions in the West of China,according to the HACCP and GMP management concept,we have developed a feasible system to trace the Halal Beef quality during the whole production *** are as follows:realizing the information collection about beef farming process,and establishing the quality information database of the Halal beef products,and integrating the application of the RFID、EAN/UCC-128 barcode,Pdf417 2-D barcode,GSM technology and Internet technology at the same *** system makes it possible that the customer can trace the whole production process of the beef through SMS,Telephone,Internet,and scanning the barcode with smart phones or others means after shopping the *** the system realizes the whole quality tracing and Muslim tracing of the beef during the process of the farming,slaughtering and *** the design and realization of the system are important technical basis of Islamic meat quality and safety for NingXia and other similar regions in the West of China.
Precipitation is important factor affecting vegetation and controlling key ecological *** order to quantify spatial patterns of precipitation in Chongqing tobacco planting region,China,under ArcGIS platform,three mult...
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Precipitation is important factor affecting vegetation and controlling key ecological *** order to quantify spatial patterns of precipitation in Chongqing tobacco planting region,China,under ArcGIS platform,three multivariate geostatistical methods including cokriging,small grid and regression kriging,coupled with auxiliary topographic factors extracted from a 1:100000DEM were applied to predict spatial distribution of precipitation for January(the least month),June(the richest month) and the whole *** results showed that cokriging was the best for prediction precipitation of January,which could explain 58%of the total *** grid simulation with IDW interpolation exhibited higher accuracy for both June precipitation and annual precipitation,which explained 72%and 61%of the total variation ***,multivariate geostatistics accounted for most of the spatial variability in mean precipitation and especially could exhibit great improvement for estimating precipitation in areas where topography has a major influence on the precipitation.
Wetlands which are the planet's most important ecosystem have high scientific research-value and will bring us both social and economic ***,duing to various natural and man made factors,more and more wetlands have...
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Wetlands which are the planet's most important ecosystem have high scientific research-value and will bring us both social and economic ***,duing to various natural and man made factors,more and more wetlands have converted to agricultural land and urban ***,the changes in wetlands' area and quantity have caused public's widespread *** wetland's management and protection will benefit from the improvement of the wetland information abstraction's *** the classification precision of the RS image is a difficult problem because of the small scale of remote sensing *** paper which is about the wetland remote sensing images extraction is based on the LANDSAT ETM remote sensing data,and the result of the Wavelet Packet reconstruction will be used as the sample set of the Active Support Vector *** the end of this paper,a comparative analysis of the experimental results will show between the single classification(SVM,BPNN) method and the solution which is proposed in this *** method can be proved to obtain very good classification results through many experiments on remote sensing image classification I've *** results show that this algorithm's classification accuracy is better than the single classification'***,in the active learning process,the bad influence of the image's isolated and intersection points on the classification is avoided,and the number of training samples are reduced greatly.
Water-quality monitoring technology has been taken a great attention in aquaculture because of increasing aquatic products and impact of food safety vicious *** order to meet the technology requirements of water-quali...
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Water-quality monitoring technology has been taken a great attention in aquaculture because of increasing aquatic products and impact of food safety vicious *** order to meet the technology requirements of water-quality monitoring in multi-parameter,dynamic,and networked monitoring,a waterquality dynamic monitoring system was developed to monitor multi-parameter water-quality variables such as water temperature,pH,dissolved oxygen,electrical conductivity,oxidation reduction potential dynamically,and communicate with remote information servers in a high *** result of a two-years testing experiment in a seawater aquiculture company,relative errors of each water-quality parameter measured by the instrument were less than 5%,data lost percentage of remote communication was less than 3%,and power energy consumption was less than 13 ***,the water-quality dynamic monitoring system as a node infrastructure of wireless sensor networks can be used to achieve a distributed water-quality network monitoring system in a large-scale aquaculture farm,or to construct a distributed water-quality monitoring network system in multipoint of different cities for aquaculture farm and administration section.
the anthocyanin(Anth) content in leaves provides valuable information about the physiologocal status of ***,there is a need for accurate,efficient,practical methodologies to estimate this biochemical *** measurement i...
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the anthocyanin(Anth) content in leaves provides valuable information about the physiologocal status of ***,there is a need for accurate,efficient,practical methodologies to estimate this biochemical *** measurement is a means of quickly and nondestructively assessing leaf Anth in *** chemical methods has traditionally been used for this ***,NIR(near-infrared)/green,red/green,anthocyanin reflectance index(ARI),and a modified anthocyanin refelctance index(MARI) was been used to estimate the anthocyanin *** this paper,a an artificial-intelligence technique model was introduced to establish the relationship between the anthocyanin content and reflectance of 400-750 nm spectum,variation of species and growth *** objective of this study was to test the overall performance and accuracy of this new nondestructive techniques for estimating Anth content in grapevine *** Anth in validation data set was widely variable,the new methods were capable of accurate predicting Anth content in grapevine leaves with a root mean square error below 1.65 mg/m2,which is lower than that of MARI or ARI[20].It documents the facts that such an approach is more suitable for developing simple hand-held field instrumentation for accurate nondestructive Anth estimation and for analyzing digital airborne or satellite imagery to assist in making informed decisions vineyard management.
the spectral signatures of crop canopies in the field provide much information relating morphological or quality characteristics of crops to their optical *** experiment was conducted using two winter-wheat{Triticum a...
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the spectral signatures of crop canopies in the field provide much information relating morphological or quality characteristics of crops to their optical *** experiment was conducted using two winter-wheat{Triticum aestivum) cultivars,Jingdong8(with erect leaves) and Zhongyou9507(with horizontal leaves).We analysiced the relation between the direction spectral characteristics and the laeves nitrogen content(LNC).the result showed that the spectral information observed at the 0° angle mainly provided information on the upper canopy and the lower layer had little impact on their ***,the spectral information observed at 30° and 60° angles reflected the whole canopy information and the status of the lower layer of the canopy had great effects on their *** analysis indicated that the ear layer of canopy and the topmost leaf blade made greater contributions to *** predicted grain protein content(GPC) model by leaf layers spectra using 0°view angle was the best with root mean squares(RMSE) of 0.7500 for Jingdong8 and 0.6461 for *** coefficients of determination,R2 between measured and estimated grain protein contents were 0.7467 and ***,grain protein may be reliably predicted from the leaf layer spectral model.
Digital agriculture is an"intelligent"computer management and application system that includes many high technologies of,such as infomationization, digitization,network,automation and more so ***
ISBN:
(纸本)9783642183355
Digital agriculture is an"intelligent"computer management and application system that includes many high technologies of,such as infomationization, digitization,network,automation and more so ***
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