棉花是黄土高原南部台塬区主要的作物之一。在田间条件下,它和小麦一样,对土壤深层储水,依然有明显的效应。1957年我们发现,尽管当年雨季提早于7月底结束,8、9两个月降水量只有28.8毫米,相当于同期棉花正常耗水量的13.5%,但在我所武功头道 Cotton is one of the main crops in the Taiwan plateau in the southern Loess Plateau. Under field conditions, like wheat, it still has a significant effect on deep soil water storage. In 1957, we found that although the rainy season was earlier than the end of July, the precipitation in August and August was only 28.8 millimeters, equivalent to 13.5% of the normal consumption of cotton in the same period. However,