关键词: 大豆蚜, 大豆蚜, 生物学, 大豆, 综述

Abstract:

Abstract: It is very important to increase the yield of wheat, which is one of China's three major food crops. After calculating the Efficiency Advantage Index and the Scale Advantage Index of wheat production, this paper concludes the Aggregated Advantage Index of wheat production between 2000 and 2008, and expresses it in space on the map using the MapInfo software. The result shows that: the Huang-Huai region, Northwest Territories, Tibet and parts of the Yangtze River has a comparative advantage in producing wheat. To increase the yield of wheat in the future, it is necessary not only to pay attention to the areas which have traditional comparative advantage in producing, such as Henan Province, but also to support and rely on Anhui, Jiangsu and other new areas of aggregated advantage in producing wheat.