Established And Demonstration Of Specialistic Information Systems On Soil Testing And Formulated Fertilization In Dongan County

Fertilzation is the major measure and agricultural technology to improve the production of crops. However, due to years of blind fertilization and excessive fertilization, use efficiency of fertilizer had been reduced, which resulted in ecological environment deterioration as well as soil degradation. Soil testing and formulated fertilization is one of the core technologies of precision agriculture which can be used to provide the farmers with scientific fertilizing scheme, thus agricultural production environment could get improved and precise and sustainable development could be realized. Against the backdrop of soil testing and fertilizer recommendation generalization project of Hunan Province, software like MAPGIS, ARCGIS and CLRMIS were used in this research to build relative evaluation model, with the help of which Dong'an County's farmland productivity and rice adaptability were figured out, soil testing and fertilizer recommendation expert system was established, demonstrated and promoted. The main results of the research are as follows:(1) Dong'an County's farmland productivity evaluation degree:first grade arable land accounts for 7090.53 hm2, second grade 7408.32 hm2, third grade 5820.85 hm2, fourth and fifth grade accounts for 4935.08 and 6736.92 hm2 each, while sixth and seventh accounts for 6673.97 and 5447.68 hm2 each.(2) Based on soil testing and fertilizer recommendation expert system, combined with farmland productivity feature and field experiment results, Dong'an County's rice fertilization indicator system was established, and rice fertilization formulas were as follows:15:15:15,20:10:15,15:7:11,18:12:15. By means of building related fertilization parameter, analyzing model and membership function, rice soil testing and fertilizer recommendation expert system was established.(3) Based on State Soil Testing and Fertilizer Recommendation Data Management and Information Distribution Platform, several functions were realized, Dong'an County's soil testing and fertilizer recommendation formula, soil nutrients characteristics as well as farmland productivity evaluation degree can be inquired through both text and Wechat message.(4) Soil testing and fertilizer recommendation expert system mobile information service was demonstrated and promoted in Duanqiaopu Town and Lumaqiao Town of Dong'an County, technical training and instruction were organized, mobile information service work of soil testing and fertilizer recommendation in Dong'an County was facilitated.