[1]王 伟,李占斌,李 鹏,等.生态建设对坡面土壤有机碳分布的影响[J].水土保持研究,2020,27(02):35-41.
　WANG Wei,LI Zhanbin,LI Peng,et al.Effect of Ecological Construction on Soil Organic Carbon Distribution on Slope Land[J].Research of Soil and Water Conservation,2020,27(02):35-41.
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生态建设对坡面土壤有机碳分布的影响

《水土保持研究》[ISSN:1005-3409/CN:61-1272/P] 卷: 27 期数: 2020年02期 页码: 35-41 栏目: 出版日期: 2020-03-30
Title:
Effect of Ecological Construction on Soil Organic Carbon Distribution on Slope Land
文章编号:
1005-3409(2020)02-0035-07
作者:
王 伟1,2, 李占斌1,2,3, 李 鹏1,2, 王飞超1,2, 张 祎1,2
(1.西安理工大学 旱区生态水文与灾害防治国家林业局重点实验室, 西安 710048; 2.西安理工大学 西北旱区生态水利工程国家重点实验室, 西安 710048; 3.中国科学院 水利部 水土保持研究所 黄土高原土壤侵蚀与旱地农业国家重点实验室, 陕西 杨凌 712100)
Author(s):
WANG Wei1,2, LI Zhanbin1,2,3, LI Peng1,2, WANG Feichao1,2, ZHANG Yi1,2
(1.Key Laboratory of National Forestry Administration on Ecological Hydrology and Disaster Prevention in Arid Regions, Xi'an University of Technology, Xi'an 710048, China; 2.State Key Laboratory Base of Eco-hydraulic Engineering in Arid Area, Xi'an University of Technology, Xi'an 710048, China; 3.State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Soil and Water Conservation, CAS&MWR, Yangling, Shaanxi 712100, China)
关键词:
生态建设;  埝堰沟;  坡位;  有机碳
Keywords:
ecological construction;  Nianyan watershed;  slope position;  organic carbon
分类号:
S153.6
文献标志码:
A
摘要:
生态建设工程是防治水土流失和恢复土壤肥力的重要措施,研究生态建设工程对土壤有机碳及其组分的影响,旨在揭示黄土高原不同恢复模式下有机碳的分布规律及土壤动态有机碳的影响因子。以黄土高原典型小流域埝堰沟为研究对象,探讨了坡耕地、林—灌地、草地、梯田4种不同土地利用方式对土壤有机碳及土壤活性有机碳主要组分空间分布的影响。结果表明:(1)坡耕地经生态建设后可以显著增加0—20 cm土层有机碳含量。林—灌地有机碳含量主要集中在0—20 cm土层深度的上坡位,草地有机碳含量主要集中在0—20 cm土层深度的下坡位,梯田有机碳含量主要集中在0—20 cm土层深度的上坡位。(2)相比于坡耕地,林—灌地、草地和梯田在0—20 cm土层深度的易氧化有机碳含量有所减少,但增加了0—20 cm土层深度的颗粒态有机碳、轻组有机碳和重组有机碳含量。(3)颗粒态有机碳对土地利用变化的敏感性强于有机碳及其主要组分(易氧化有机碳、轻组有机碳和重组有机碳),因此,颗粒态有机碳可以作为评估土地利用变化对土壤有机碳影响的良好指标。
Abstract:
Ecological construction project is an important measure to prevent soil erosion and restore soil fertility. The study on the influence of ecological construction project on soil organic carbon and its components aims to reveal the distribution rule of organic carbon and the influencing factors on soil dynamic organic carbon under different restoration modes on the Loess Plateau. The soil organic carbon and soil active organic carbon spatial distribution in the Nianyan watershed, a typical small watershed, on the Loess Plateau were studied. The results show that:(1)the organic carbon content of 0—20 cm soil layer can significantly increase in the sloping land after ecological construction; the organic carbon content of mainly concentrates in the upper slope of 0—20 cm soil depth in forest-bush land; the organic carbon content mainly concentrates in the downslope of 0—20 cm soil depth in the grassland; organic carbon content mainly concentrates in 0—20 cm soil in the terraces of the uphill position;(2)compared with sloping farmland, the contents of easily oxidizable organic carbon in the depth of 0—20 cm soil layer of forest-bush land, grassland and terraced fields reduce, but the contents of particulate organic carbon, light fraction of organic carbon and recombinant organic carbon in the depth of 0—20 cm increase;(3)granular organic carbon is more sensitive to land use change than organic carbon and its main components(easy to oxidize organic carbon, light organic carbon and recombinant organic carbon). Therefore, particulate organic carbon can be used as a good indicator of the impact of land use changes on soil organic carbon.

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备注/Memo

收稿日期:2019-04-18 修回日期:2019-05-07 资助项目:国家自然科学基金面上项目“基于能量过程的沟道工程侵蚀阻控机理研究”(51779204) 第一作者:王伟(1986—),男,陕西延安人,博士研究生,研究方向为水土保持研究。E-mail:360007519@qq.com 通信作者:李占斌(1962—),男,河南南阳人,博士,教授,主要从事土壤侵蚀与水土保持研究。E-mail:zhanbinli@126.com

更新日期/Last Update: 2020-02-25