关键词: 玉米, 生长发育, 叶片, 积温, 模拟

Abstract: Poverty associates with cultural lay, which obstructs the development of economy. The lag of culture is a problem in humane ecology. In order to change poverty to properity, education is the first task in less developed areas.

Key words: Zea mays, Development, Leaf, Growing degree-days, Simulation