兴国县主要侵蚀土壤水分含量的研究

在水土流失区，夏秋季节土壤因高温缺水致使水土保持植树造林难于成活。为了揭示土壤水分的变化情况，寻求植物安全越夏的栽植深度，对三种主要侵蚀土壤，在不同植被下，4—9月份进行了定点土壤水分观测。结果表明，第四纪红土母质红壤和紫色土，在夏秋季节，土深30厘米左右的水分含量变化比较稳定。而花岗岩母质红壤，30厘米以下土层的土壤水分，明显的较上层高。同时说明地被物对提高土壤的保水能力有很大的作用，并提出了在花岗岩流失区，提高树木成活率的栽植方法的建议。

STUDY ON THE WATER CONTENT OF MAJOR ERODED SOILS IN XINGGUO COUNTY OF JIANGXI PROVINCE

In soil erosion areas of southern China, it is difficult to grow trees and grasses for soil and water conservation in summer and autumn as temperature is too high and water content is too low. To determine suitable water situation of soils and to decide the optimum depth for planting and seedling, stationary observation of the water content of three soils under different vegetation was carried out during April to September of raining season. The results were shown that the change of water content under 30cm in the profile is stable in soils derived from quaternary red clay and purple shale during experimental period, while the marked variation are occurred in soils from granite moreover, mulches may show important effect on the improvement of the capacity of soil reserving water. Finally, proposals to enhance survived rate of the seedliog in granitic soils were advanced.