辽宁东部林区不同林分类型土壤团聚体稳定性研究  

Stability of Soil Aggregate in Different Forest Land Types in Eastern Forest Region of Liaoning Province

作　　者：鲍国涛 Bao Guotao(Benxi County Forestry Development Service Center,Benxi 117100,China)

机构地区：[1]本溪县林业发展服务中心,辽宁本溪117100

出　　处：《防护林科技》2020年第12期12-14,共3页Protection Forest Science and Technology

摘　　要：通过对辽宁东部天然次生林、针阔混交林和针叶纯林3种林分土壤团聚体稳定性进行研究,结果表明:在0~10 cm土层,天然次生林大于2 mm土壤团聚体含量显著高于针叶纯林和针阔混交林,并且天然次生林土壤团聚体含量最大,土壤水稳性团聚体含量最高,平均重量直径、几何平均直径由大到小依次为天然次生林、针阔混交林、针叶纯林;在10~20 cm的土层,天然次生林0.25~1 mm土壤团聚体、水稳性团聚体含量均显著高于针叶纯林和针阔混交林,平均重量直径差异不显著,几何平均直径天然次生林最大;在20~30 cm土层,各个粒级土壤团聚体含量无显著差异,天然次生林土壤团聚体稳定性最好,抗冲性和抗侵蚀能力最强。Through studying the soil aggregate stability of natural secondary forests,coniferous and broad-leaved mixed forests,and pure coniferous forests in eastern Liaoning Province,result shows that the soil aggregate content of natural secondary forests is greater than 2 mm in a soil layer of 0 cm-10 cm.It is significantly higher than that of pure coniferous forest and coniferous and broad-leaved mixed forest,and natural secondary forest has the largest soil aggregate content and soil water-stable aggregate content.The average weight diameter and geometric average diameter are both natural secondary forest>coniferous and broad-leaved mixed forest>pure coniferous forest.In a soil layer of 10 cm-20 cm,the content of soil aggregates and water-stable aggregates of 0.25 mm-1 mm in natural secondary forests are significantly higher than those of pure coniferous forests and mixed coniferous and broad-leaved forests.The difference in average weight diameter is not significant,while the geometric average diameter of natural secondary forests maximum.In the soil layer of 20-30 cm,there is no significant difference in the content of soil aggregates of various grain sizes.The soil aggregates under the natural secondary forest have the optimal stability,and the strongest anti-scourability and erosion resistance.

关 键 词：辽东山区 林分类型 土壤团聚体 稳定性 

分 类 号：S714[农业科学—林学]