秦岭山地不同龄组华山松林地土壤、凋落物有机碳特征  

The Characteristics of Soil and Litter Organic Carbon in Different Age Groups of Pinus armandii Forest in the Qinling Mountains

作　　者：岳亚军 杨菲 YUE Ya-jun;YANG Fei(Matoutan Forestry Bureau of Baoji City,Baoji,Shaanxi 721006)

机构地区：[1]宝鸡市马头滩林业局

出　　处：《陕西林业科技》2019年第4期8-12,共5页Shaanxi Forest Science and Technology

摘　　要：林地土壤有机碳反映了林地土壤质量,直接影响着森林生态系统生产能力。本研究以秦岭马头滩林区不同龄组华山松为研究对象,分析了华山松林土壤和凋落物有机碳含量、密度及其影响因素。结果表明:华山松林土壤有机碳含量随林龄的增长总体呈上升趋势,随土层深度增加而减小;凋落物层有机碳含量随林龄的增长先增加后减小再增加。华山松林表层土壤有机碳密度随林龄的增长而增加。华山松林龄、乔木层生物量、胸高断面积、土壤容重和乔木层密度与土壤有机碳含量、密度呈显著相关关系。Organic carbon of forest soil reflectsforest soil quality and directly affects forest productivity. In this study, the organic carbon content, density and influential factors of soil and litter of Pinus armandii in Matoutan of Qinling mountains were analyzed. The results showed that soil organic carbon content in Pinus armandii forest increased with the growth of forest age and decreased with the increase of soil depth. With the growth of forest age, the organic carbon content of litter layer first increased, then decreased and then increased. The surface soil organic carbon density of Pinus armandii forest increased with the growth of forest age. There was a significant correlation between tree age, tree layer biomass, chest height sectional area, soil bulk density and tree layer density and soil organic carbon content and density.

关 键 词：秦岭 土壤有机碳含量 有机碳密度 林龄 华山松 

分 类 号：S153.6[农业科学—土壤学]