饶阳试验区林网保护下的棉田土壤水分平衡的研究

Study on the Water Balances of Soil in the Cotten Field under Forest Shelter Network in Raoyang Experimental Areas

本文分析了林网内土壤水分的变化动态。结果表明,在整个生长季中,林网内土壤湿度、贮水量均高于林外。林网内外土壤含水量均有明显的季节性变化。林网内棉花全生育期水分供需不平衡,但不同生育阶段又有所不同,现蕾～开花期自然供水明显不足。林网内棉花产量高于林外,提高了水分利用效率。

The paper deals with changeable developments of soil water in the forest shelter network. The results showed that the soil moisture,soil water reserves inside the forest shelter network were more than those outside it in a growing phase.Soil moisture content had clear seasonal change inside forest shel- ter network and outside it.All growing period of cotton water supplies and demands do not balance in the forest shelter network,but diferent growing stages are different to some extent ,natural precipitation of squaring—florescence period supplies obvious insufficiency.Output of cotton inside the forest shelter network was higher than that of cotton outside,forest shelter network increased water use efficiency.