不同年龄阶段马尾松人工林土壤水分-物理性质

Soil Water-Physical Properties of Pinus massoniana Plantation at Different Ages

本研究以广西横县镇龙国有林场内的马尾松人工林为对象,旨在为马尾松林的合理经营提供科学理论依据。采用环刀法对4种不同种植年限马尾松林的土壤物理性质进行研究。结果发现,马尾松人工林土壤容重随林龄的增长呈减小的趋势,土壤饱和持水量、土壤毛管持水量和土壤渗透率随林龄的增长呈逐渐增加的趋势。土壤容重随土层深度的加深而增大,土壤孔隙度、土壤持水量以及土壤渗透速率随土层深度的加深而减小。总体上,马尾松人工林随着林龄的增长对土壤改善起到促进作用,且表层土壤处于较好状态,深层土壤改善效果逐渐增大。

This study took the Zhenlong State owned Forest Farm of Pinus massoniana forest in Guangxi Province as the researched object and aimed to provide a scientific theoretical basis for the rational management of the P.massoniana forest. The soil physical properties of P.massoniana forest under different planting years were studied by the method of cutting ring. The results showed that the soil bulk density of P.massoniana plantation decreased with the increase of forest age, while the moisture holding capacity, soil capillary capacity and soil permeability increased with the increase of forest age. The soil bulk density increased with the depth of the soil layer. On the contrary, the soil porosity, soil water capacity and the soil penetration rate decreased with the depth of the soil layer. In general, the P.massoniana plantation promoted soil improvement with the increase of forest age, and the surface soil was in a good state, and the improvement effect of deep soil gradually increased.