GIS-based Ningbo Rice Fertilization Expert System Development and Application
|School||Shanghai Jiaotong University|
|Keywords||GIS Fertilize Expert System Rice Ningbo|
With the substantial increase in the amount of fertilizer, crop fertilization effect tends to decrease yield, unreasonable or blind fertilization serious impact on the environment, development and application of scientific and rational fertilization technique is imperative. Geographic Information Systems (GIS) and computer science is the study of the emerging generation cross disciplines, the GIS used in agriculture, to solve practical technology promotion, fertilizer recommendations, etc. The problem is the need for development of modern agriculture. In this paper the use of geographic information systems (GIS) technology and artificial intelligence techniques to build Ningbo rice fertilization expert system for farmland fertility integrated query, thematic map production and fertilizer recommendation and other functions. The system is set up and application of precision agriculture is an important practice in Ningbo, Ningbo will promote scientific fertilization process and the development of modern and efficient agriculture plays an important role. The main results are as follows: (a) in the main rice producing areas in Ningbo rice undertaken in 2007-2010 \of nitrogen, phosphorus and potassium deficiency index of abundance, the establishment of water networks valley plains and coastal plains of paddy soil nitrogen abundance and deficiency index of the mathematical model was y = 31.295Ln (x) 51.98, r 2 sup> = 0.8804; y = 23.499Ln (x) 68.696, r 2 sup> = 0.8676, Olsen-P abundance and deficiency index of the mathematical model was y = 31.139Ln (x) -24.54, r 2 sup> = 0.8212; y = 29.467Ln (x) -7.088, r 2 sup> = 0.9091, potassium abundance and deficiency index of mathematical models were y = 39.464Ln (x) -94.875 , r 2 sup> = 0.8159; y = 42.543Ln (x) -118.90, r 2 sup> = 0.8791, respectively, and in a targeted manner proposed total nitrogen, Olsen-P , potassium, low, medium and high three level indicators. The results showed that the total nitrogen valley plain water network, Olsen-P and K, respectively yielding critical indicators 4.0g/kg, 47mg/kg, 122mg/kg; coastal plain of nitrogen, Olsen-P, available K yield Critical indicators were 3.1 g / kg, 32mg/kg, 150mg/kg. (2) for the current main cultivated varieties of rice Ningbo City to Soil Nutrient Contents in high, medium and low-grade as an indicator, water network valley plain rice cultivation, the different levels of soil nutrient level, the single cropping of rice fertilizer recommendation were N 11-13,13.5-14.5,14.5-16 kg/667m 2 sup>, P 2 O 5 2.5-3,3-3.5, 4-5 kg/667m 2 sup>, K 2 O 7-8.5,8.5-10.5,10.5-11.5 kg/667m 2 sup>; different soil Nutrient grade level, the amount of rice fertilizer recommendations were N 10.5-11,12-13,14-15 kg/667m 2 sup>, P 2 O 5 < / sub> 3-3.5,3.5-4.5,4.5-5 kg/667m 2 sup>, K 2 O 2.5-3,3-5,5-6 kg/667m 2 sup>; different level of soil nutrient levels, cropping rice fertilizer recommendation were N 11-12,13-14,15-16 kg/667m 2 sup>, P 2 O 5 2.5-3,3-3.5,3.5-4 kg/667m 2 sup>, K 2 O 3.5- 4,4.5-5,5.5-6 kg/667m 2 sup>. Coastal plain single cropping of rice cultivation, the different levels of soil nutrient level, the single cropping of rice were recommended amount of fertilizer N 12-13,14-16,17-17.5 kg/667m 2 sup>, P 2 O 5 3.5-4,4-5,5-6 kg/667m 2 sup>, K 2 O 2.5-3.5,3.5 - 6,6-7 kg/667m 2 sup>. (3) application of GIS and database technology to establish the properties of the relevant local rice production databases and spatial databases underlying database; based on extensive testing and survey data to establish Ningbo rice fertilization index system based on geographic information systems (GIS) and artificial intelligence technology to build Ningbo rice fertilization decision support system (ES). In Microsoft Windows environment, with ESRI's ArcGIS Engine development tools for the system secondary development of GIS applications, through the Visual Basic.NET language tools for the completion of the underlying database and fertilization decision-making systems integration, final completion of Ningbo rice fertilization expert systems. System includes map data management, map browsing query, thematic maps of soil nutrients, rice fertilization consulting four modules, with the distribution of soil nutrients and regional precision fertilizer formulations query and print functions. Friendly interface, simple operation and clear, practical, able to easily provide farmers with convenient scientific fertilization guidance for grassroots agricultural extension departments to provide technical support for the agricultural business outlets and businesses for fertilizer application platform for government decision-making reference.