By the study of the physiological character of winter wheat-LAI at heading period, this paper discussed the spatial structure of the LAI, and estabilished its semi-sphere model.

• 摘要通过对冬小麦抽穗期的生理性状指标-叶面积指数(LAI)的采样分析，探讨LAI的空间结构性，并建立变差函数模型。