天山云杉林土壤有机碳密度及影响因素研究  

Research on Soil Organic Carbon Density and Its Influencing Factors in Picea schrenkiana var.tianschanica Forest

作　　者：李思瑶 夏晓莹 王杰[1] 马小龙[1] 米尔扎提·柯尼加里木 阿丽耶·麦麦提 王卫霞[1] Li Siyao;Xia Xiaoying;Wang Jie;Ma Xiaolong;Kenijialimu Mierzhati;Maimaiti Aliye;Wang Weixia(College of Forestry and Landscape Architecture,Xinjiang Agricultural University/Key Laboratory of Forestry Ecology and Industrial Technology,Xinjiang Education Department,Urumqi 830052,China)

机构地区：[1]新疆农业大学林学与风景园林学院,新疆教育厅干旱区林业生态与产业技术重点实验室,新疆乌鲁木齐830052

出　　处：《防护林科技》2023年第3期48-51,共4页Protection Forest Science and Technology

基　　金：国家级大学生创新创业训练计划项目(202110758008)。

摘　　要：以不同生长发育阶段的天山云杉林为研究对象,分析了天山云杉林土壤有机碳密度分布特征及其影响因素。结果表明:(1)天山云杉林土壤有机碳含量随着林分发育阶段的增加呈逐渐积累增加的趋势,成熟林土壤有机碳显著高于幼龄林(P<0.05)。各发育阶段土壤有机碳含量的变异程度大小为幼龄林(69.10%)>中龄林(63.74%)>近熟林(62.68%)>成熟林(54.76%)。(2)不同发育阶段的天山云杉林土壤有机碳密度在0~<20 cm、20~<60 cm土层的变化范围分别为7.86~9.18和5.65~8.69 kg·m^(-2)。(3)天山云杉林土壤有机碳密度与林龄、林分平均胸径呈极显著正相关关系;与土壤容重呈负相关关系。The Picea schrenkiana var.tianschanica forest at different developmental stages was taken as the research objects in this study to analyze the distribution features of soil organic carbon density and explore its main influencing factors.The results showed as the following three aspects.(1)The soil organic carbon content of Picea schrenkiana var.tianschanica forest increased gradually with the increase of stand development stage,and the soil organic carbon content of mature forest was significantly higher than that of young forest(P<0.05).The variation degree of soil organic carbon content at each development stage was as follows:young forest(69.10%)>middle-aged forest(63.74%)>near mature forest(62.68%)>mature forest(54.76%).(2)The soil organic carbon density in the 0-<20 cm and 20-<60 cm soil layers at different development stage of Picea schrenkiana var.tianschanica forest varied from 7.86 kg·m^(-2) to 9.18 kg·m^(-2) and from 5.65 kg·m^(-2) to 8.69 kg·m^(-2),respectively.(3)The soil organic carbon density was positively correlated with stand age and mean DBH,while it was negatively correlated with soil bulk density.

关 键 词：土壤有机碳密度 影响因素 天山云杉 

分 类 号：S791.18[农业科学—林木遗传育种] S714.2[农业科学—林学]