Research On The Jinzhai County Farmland Nutrient Management Information System Based On Mobile GIS

Agriculture is the lifeblood and foundation of our national economy.In the long run,China's agriculture is facing less arable land,agricultural production in the irrational phenomenon of fertilization,fertilization technology is relatively backward,difficult to implement farmers scientific fertilization and other issues.Most farmers scientific fertilization awareness weak,excessive fertilization,fertilizing blind phenomenon is widespread.Since farmers in order to solve the problem encountered in fertilization,the Ministry of Agriculture,the Ministry of Finance made to carry out soil testing and fertilizer technology promotion major decisions in the country in 2005,around the country have carried out the county Fertilization work.Therefore,in order to find out the fertility of cultivated land,the cultivated land fertility evaluation to improve work efficiency,improve the level of scientific fertilization,throughout the relevant departments have gradually formed a large number of valuable scientific data.In recent years,mobile intelligent terminal(PDA)as the carrier of mobile GIS technology is developing rapidly,and reflect the precise fertilization in the field inquiries,and other aspects of field information collection and query the potential benefits.This article is soil testing and fertilizer technology and mobile GIS technology combined,the results of data integration and processing,research and the establishment of Jinzhai County farmland nutrient management information system based on GIS move.Mainly made the following findings:(1)Two common nutrient that is interpolation method Kriging and inverse distance weighting interpolation method research to organic matter Jinzhai County as an example,through cross-validation,comparison can be concluded: the Kriging interpolation accuracy greater than IDW,choose the best interpolation methods.(2)The use of geostatistical analysis of soil nutrients in Jinzhai County of total nitrogen,organic matter,phosphorus and potassium spatial variability analysis of the four nutrients are moderate variability,the coefficient of variation in the order of available P> available K> total nitrogen> organic matter,where the largest variability phosphorus,potassium larger the standard deviation,indicating that the content difference in the large study region.(3)Application of the second soil survey NPK grading standards,establish the abundance and deficiency index,Regional fertilization model to Jinzhai County wheat,for example,based on soil nutrients at different levels of low high school,combined with "3414" Test Parameters Jinzhai County farmers and fertilizer experience with the model calculated a reasonable amount of top dressing fertilizer formulations and ultimately draw wheat fertilizer partition map.And the use of precision fertilizer nutrient balance model Study of sampling points.(4)Establishment of database: A system attribute database and spatial database was constructed,and finally connect and unified management attribute database and spatial database by the same name field.(5)The system used Android operating system,through the acquisition mode both online and offline,implementation farmland nutrient management information system based on mobile GIS,and land property system,the sampling point properties,fertilization,GPS location query and quickly find the recipe calculator,crop pattern victims,supporting documentation,and other module functions are described in detail.