常绿阔叶林地被层在群落中的作用——以浙江天童为例

Contrastive analysis of the cotton planting regions between Sichuan Basin and Jianghan Plain and the selection of appropriate cotton planting regions

对常绿阔叶林地被层在群落中的作用作了初步研究．结果表明：地被层阻碍凋落物进入地表，地被层枯死物与森林凋落物构成层层交错重迭的密层，大量减弱地表光照，阻碍土壤蒸发，使地表过度阻湿，不利于乔木优势种种子保存及幼苗存活．

Taking Tianmen city of commodity cotton where is on Jianghan plain and using fuzz similitude choice,the weather conditions of different cotton planting region in Sichuan Basin are analysed contrastively.Aaccording to the result of analysis and the developing tendency of cotton in future,a proposal about the regulation of cotton planting region in Sichuan Basin is given.