重庆四面山常绿阔叶林种子库与生态因子灰色关联度分析

用“灰色关联分析法”研究了种子库大小与生态因子间关联的程度．结果表明，不同海拔高度种子库的大小与土壤厚度、枯落物厚度、地上植物种类关联度最大；同一海拔高度种子库的大小与土壤厚度、枯落物厚度关联度最大．对主导因子的分析结果表明，同一海拔高度的生态因子间比不同海拔高度的生态因子间具有更高的关联度；不同海拔高度的生态因子中受其它因子影响最大的是土壤ｐＨ值和枯落物厚度；相同海拔高度的生态因子中受其它因子影响最大的是土壤厚度．

A analysis on grey relatedness degree between soil seed banks and ecological factors of evergreen broad leaved forest of Simian Montain Chongqing

Based on the methods of grey relatedness degree analysis, the study on soil seed banks and ecological factors shows that: at different elevation there are high relatedness degress between soil seed banks and thickness of soil, fallen branches and leaves, no. of species; at the same elevation, there are high relatedness degrees between soil seed banks and thickness of soil, fallen branches and leaves. The study also shows that: at different elevation, pH value of soil and thickness of fallen branches and leaves are deeply effected by other factors; at the same elevation, thickness of soil is deeply effected by other factors.