【摘要】 长江流域是我国农业生产的重要区域，农业发展总体水平高于全国平均，但流域内农业发展的自然条件、资源状况、人文特点等不尽一致，各省市农业发展在农业、农村经济、农业生产投入、农业及粮食生产等方面存在较大的地域差异。运用主分量分析法，得出各省市农业发展水平的综合评价结果；并在此基础上，根据主导农产品专业化生产和发展方向的分异，将长江流域划分为3大区17个亚区。更多还原

【Abstract】 Yangtze Basin is an important agriculture region of China;its agricultural development level is higher than the national average.The provinces and municipalities in Yangtze Basin differ markedly in terms of agricultural economy,agricultural investment and status of agricultural and grain production.A comprehensive evaluation of the agricultural development level of these proivinces and municipalities is given through principal component analysis method(PCA).According to the evaluation and the differences of main products and agricultural development tendency,the Yangtze Basin is divided into 3 districts and 17 subdistricts.更多还原