土地利用方式对岩溶山地土壤轻组和重组有机碳的影响

doi:10.3969/j.issn.1004-1524.2017.10.18

浙江农业学报 ›› 2017, Vol. 29 ›› Issue (10): 1720-1725.DOI: 10.3969/j.issn.1004-1524.2017.10.18

土地利用方式对岩溶山地土壤轻组和重组有机碳的影响

蓝家程¹, 肖时珍^{1, 2, *}, 林俊清¹, 沈艳³

1.贵州师范大学喀斯特研究院/国家喀斯特石漠化防治工程技术研究中心,贵州贵阳 550001;
2.西南大学地理科学学院/三峡库区生态环境教育部重点实验室,重庆 400715;
3.四川省眉山中学,四川眉山 620010

收稿日期:2017-03-14 出版日期:2017-10-20 发布日期:2017-12-05
通讯作者: 肖时珍,E-mail:xiaoshizhen@gznu.edu.cn
作者简介:蓝家程(1986-),男,壮族,广西都安人,博士,副教授,研究方向为喀斯特生态环境。E-mail: lanjc2016@163.com
基金资助:
国家自然科学基金(41601584); 贵州省科学技术基金(黔科合J字[2015]2111号); 贵州师范大学2015年博士科研启动项目(600204)

Effect of land use types on soil light and heavy fraction organic carbon in Karst mountain area

LAN Jiacheng¹, XIAO Shizhen^{1, 2, *}, LIN Junqing¹, SHEN Yan³

1. School of Karst Science, Guizhou Normal University/State Key Engineering Technology Research Center for Karst Rocky Desertification Rehabilitation of China, Guiyang 550001, China;
2. Key Laboratory of Eco-Environments in Three Gorges Reservoir, Ministry of Education/School of Geographical Science, Southwest University, Chongqing 400715, China;
3. Meishan High School, Meishan 620010, China

Received:2017-03-14 Online:2017-10-20 Published:2017-12-05

摘要/Abstract

摘要： 以重庆中梁山岩溶山地的林地、菜地、草地和弃耕地为研究对象,采用有机碳密度分组法、单因素方差分析和相关分析,研究不同土地利用方式对土壤轻组有机碳(LFOC)和重组有机碳(HFOC)含量、分配及敏感性的影响。结果表明,林地、菜地和草地土壤LFOC、HFOC、有机碳(SOC)含量及LFOC/SOC均显著高于弃耕地;而土壤HFOC/SOC以弃耕地最大。不同土地利用方式下,土壤LFOC、HFOC、SOC含量均随土层深度增加而下降。土壤LFOC敏感性最高,其次为SOC,HFOC敏感性最低。LFOC能更敏感地反映土地利用方式的变化,可作为反映土壤质量变化和土壤有机碳稳定性的敏感性指标。

关键词: 岩溶山地, 土地利用, 土壤有机碳, 土壤性质

Abstract: In the present study, forest land, vegetable land, grass land and abandoned land in Karst mountainous area of Zhongliang in Chongqing were selected as study objects. Influences of different land use types on soil light fraction organic carbon (LFOC) and heavy fraction organic carbon (HFOC) contents, distributions and sensitivity were studied using the method of relative density fractionation, variance analysis and correlation analysis. It was shown that contents of soil organic carbon (SOC), LFOC, HFOC and LFOC/SOC in forest land, vegetable land, grass land were significantly higher than those in abandoned land. However, HFOC/SOC in abandoned land were higher than those in the other land use types. The contents of LFOC, HFOC and SOC under different land use types decreased with the increasing soil depth. Soil LFOC had the highest sensitivity, and was followed by SOC and HFOC. Soil LFOC was more sensitive to the land use changes. Therefore, soil LFOC could be used as indicator of soil quality and soil organic stability.

Key words: Karst mountain, land use, soil organic carbon, soil property

中图分类号:

S153.6

蓝家程, 肖时珍, 林俊清, 沈艳. 土地利用方式对岩溶山地土壤轻组和重组有机碳的影响[J]. 浙江农业学报, 2017, 29(10): 1720-1725.

LAN Jiacheng, XIAO Shizhen, LIN Junqing, SHEN Yan. Effect of land use types on soil light and heavy fraction organic carbon in Karst mountain area[J]. , 2017, 29(10): 1720-1725.

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土地利用方式对岩溶山地土壤轻组和重组有机碳的影响

Effect of land use types on soil light and heavy fraction organic carbon in Karst mountain area

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