关键词: 人工绿洲, 潜在格局, 现实格局

Abstract: The changes of leaf area and dry-matter production of three corn communities with different sowing time are determined. Its considered that the variance of productivity in this experiment must be mainly induced by radiation. Therefore, the latter should be chiefly considered when sowing time of corn community is selected.

Key words: Artificial oases, Potential pattern, Actual pattern