鄂西长江小流域不同土地利用类型土壤有机碳特征研究  

Characteristics of Soil Organic Carbon in Different Land Types in Small Watershed of Yangtze River in western Hubei Province

作　　者：郭婷 舒倩 马悦阳 罗婷 夏露 Guo Ting;Shu Qian;Ma Yueyang;Luo Ting;Xia Lu(College of Biology and Pharmacy,China Three Gorges University,Yichang 443002,China;College of Civil Engineering&Architecture,China Three Gorges University,Yichang 443002,China)

机构地区：[1]三峡大学生物与制药学院,湖北宜昌443002 [2]三峡大学土木与建筑学院,湖北宜昌443002

出　　处：《环境科学与管理》2022年第3期154-158,共5页Environmental Science and Management

基　　金：宜昌市自然科学研究项目(A20-3-010)自然资源部城市自然资源监测与仿真重点实验室开放基金资助项目(KF-2019-04-071);中国科学院山地灾害与地表过程重点实验室开放基金(2019001)。

摘　　要：为探究下牢溪小流域土壤有机碳特征,选取流域内5种土地利用类型(天然林、人工柏树林、石坎人工林、石坎农田和蔬菜地)为研究对象。土壤有机碳及组分含量差异显著,大致表现为天然林>柏树林>石坎人工林>石坎农田>蔬菜地,季节间差异显著,表明土地利用类型与季节显著影响土壤SOC及其组分含量。天然林转变为人工林或耕地后,土壤有机碳含量明显下降。研究区林地土壤有机碳组分分配比例较高,具有更高的土壤肥力。In order to explore the characteristics of soil organic carbon in Xialaoxi small watershed,five land use types of natural forest,artificial cypress forest,Shikan plantation,Shikan farmlandand vegetable farmare selectedas the research object.The results showed thatthe contents of soil organic carbon and components are significantly different,which is roughly manifested asnatural forest>artificial cypress Forest>Shikan plantation>Shikan farmland>vegetable farm.The seasonal differences are significant,indicating that land use types and seasons significantly affect the contents of soil SOC and its components.The results indicate that land use type and seasons significantly affected the content of SOC and its components.After natural forest was transformed into plantation or cultivated land,the content of soil organic carbon decreased significantly.The study area soil the forest soil organic carbon component allocation proportion washigh,and has higher soil fertility.

关 键 词：土地利用类型 土壤有机碳 有机碳组分 季节变化 鄂西小流域 

分 类 号：X53[环境科学与工程—环境工程]