盐碱地刺槐臭椿混交林土壤养分动态研究

Dynamics of Soil Nutrient of Mixed Forest of Robinia pseudoacacia & Ailanthus altissima in Saline-Alkali Soil

对盐碱地上刺槐、臭椿纯林及混交林中不同季节不同土层土壤养分含量的变化进行了研究,结果表明:各林分间的土壤养分含量在各个季节和土层均表现出差异,土壤养分含量在土层中的分布有一定的规律性,总的来说,随着土层厚度逐渐增加,土壤养分含量逐渐降低;在树木生长表现和土壤养分含量方面,混交林优于纯林。

The soil nutrient contents of different soil layers at different seasons in pure and mixed forest of Robinia pseudoacacia Ailanthus altissima were studied.Result indicates that there were differences between different stands on soil nutrient contents at different seasons soil layers;it＇s also shown that the distributions of the soil nutrient contents in different soil layers have some regularity,totally,the soil nutrient contents decrease gradually with the decrease of the soil layer depth;the growth of trees and the soil nutrients content of mixed forest are all optimal than that of the pure ones.