关键词: 冬小麦, 生产力, 计算方法

Abstract: In this paper, on the basis of summing up the works of previous researchers, we re-clarify the concept of crop productivity, put forth that the productivity contains many levels and that each level represents different productivity and has different limiting factors, and give a de-fination to each level. Proceeding from the atmosphere-crop-soil system, we probe into the relation between the growth, development and yield of the winter wheat on one hand and the environmental factors and the energy input on the other. Adopting the method which combines the dynamic simulation with the statistic analysis and making use of the d BASE-Ⅲ and BASIC languages, we set up the dynamic simulation software of the growth, development and productivity formation. of the winter wheat. The software can calculate the dry matter accumulation and the leaf index of the winter wheat and the soil moisture balance in different regions according to different needs. It can also calculate the productivity of each level.

Key words: winter wheat, productivity, calculation method