Drought and Flood Disaster Control of Agricultural Land and Optimization Method of Planting Structure to Avoid Disaster

Agricultural disasters frequently occur in China. Therefore, this article studied the prevention and control of drought and flood disasters in agricultural land and the optimization method of planting structures to avoid disaster. Firstly, the impact of the change of input structure on the prevention and control of drought and flood disasters on agricultural land was analyzed, and the evaluation system of input-output efficiency was constructed. Secondly, the evaluation model was built by DEA method, so as to provide the theoretical basis for the quantitative evaluation of input-output efficiency. Taking Jiangxi Province as an example, the input-output data of drought and flood control of agricultural land in twenty cities in 2014-2017 was analyzed. The results show that the input-output efficiency of 80% of farmland in Jiangxi Province is low, and the resources of drought and flood prevention are not sufficiently utilized. In addition, the low pure technical efficiency and scale efficiency are the main reasons for the low input-output efficiency of drought and flood prevention. The effect of human and financial input in drought and flood prevention of farmland in Jiangxi Province is slightly different for value output and actual output. From the aspects of strengthening the investment in basic facilities and the technical research and development of agricultural products, the optimization strategy for the input structure of drought and flood prevention of agricultural land is put forward.