EVALUATION ANALYSIS AND STRUCTURAL OPTIMIZATION OF CROP PLANTING STRUCTURE IN NORTHEAST CHINA

摘要

As a large agricultural country, China has widely distributed crop cultivation. In northeast China, an important commodity grain production base, the optimization of planting structure is helpful to the full utilization of cultivated land resources and the maximum realization of economic benefits. This article selects water resources, ecological environment, social and economic benefits as indicators, uses the Orientor stars method to construct a coordinated multi-objective evaluation index system and the analytic hierarchy process to conduct a questionnaire survey. The thesis uses the weighted average method to analyze the information synthetically and calculatethe weight of each evaluation index to obtain the evaluation model of planting structure eventually. This thesis selects the Chahayang irrigation area in northeast China, takes food, tuber, grass, shelter forest as main bodies and sets evaluation targets. Then a model of planting structure based on scale coordination and optimization is established. It is concluded that the model is consistent with the actual trend and has the feasibility to provide theoretical basis for optimizing planting structure.