Study On Automatic Decision System Of Maize Variety Fertilization Based On GIS

Maize variable fertilization operation automatic decision system,which is the key link of precision agriculture.As precision agriculture developed,nations around the world are trying to make research and development in this area.In order to improve the efficiency of production,it is an important step to perfect and widely use maize variable fertilization operation automatic decision system.Today’s precision agriculture is mainly to increase production as the main objective,but to increase production on the basis of environmental protection,balance soil fertility is very important.In this study,we used the soil grid sampling method to obtain the soil nutrient content of the land to be studied in He Long Town,Nong’an County,Changchun City,Jilin Province,and designed the automatic decision-making system of maize variable fertilization based on GIS technology.The system completed the survey of plots’ boundary,divided the grid area,marked the sampling point and produced the variable fertilization map;and the field experiment of maize variable fertilization was carried out between 2014 and 2017.And compared with traditional fertilization plots,variable fertilization increases the yield of maize to a certain extent,and in the case of reasonable control of the amount of fertilizer,it can achieve both the goal of reducing input and increasing production.The main innovation of this paper is :(1)We use GPS equipment to map the field plots to be studied,and obtain the boundary of the plot.The automatic decision-making system is automatically divided into multiple grid regions by maize variable fertilization operation.At each unit center,And samples the soil nutrient content report,after analysis and treatment,plotting the variable fertilization prescription to achieve the ultimate goal of variable fertilization.(2)Using SMS mapping software,combined with the final fertilization amount calculated to produce variable fertilization prescription map,and through controlling actual operation of variable fertilization planter in the field by computer to meet the requirements of technicalization and modernization of precision agriculture.By controlling the variable fertilizers we combines the calculation of the amount of fertilizer and the formulation of the variable fertilization prescription to achieve the purpose of the study.The field experiment results show that the combination of GIS-based automatic decision-making system of maize variable fertilization and GIS can meet the requirement of fertilization of maize in precision agriculture.