Impacts of Slope Cropland Rebuilding on Soil Labile Organic Matter and Carbon Management Index in the Eroded Hilly Loess Plateau

DAI Quan-hou; LIU Guo-bin; XUE Sha; YU Na; LAN Xue

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Impacts of Slope Cropland Rebuilding on Soil Labile Organic Matter and Carbon Management Index in the Eroded Hilly Loess Plateau

- Impacts of Slope Cropland Rebuilding on Soil Labile Organic Matter and Carbon Management Index in the Eroded Hilly Loess Plateau
- Bulletin of Soiland Water Conservation Vol. 27, Issue 4, Pages: 17-21(2008)
- 作者机构：
  
  1. 中国科学院水利部水土保持研究所西北农林科技大学, 陕西杨凌,712100
  2. 西安理工大学,陕西,西安,710048
  3. 贵州大学林学院,贵州,贵阳,550025
- 作者简介：
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- Published：2008
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DAI Quan-hou, LIU Guo-bin, XUE Sha, et al. Impacts of Slope Cropland Rebuilding on Soil Labile Organic Matter and Carbon Management Index in the Eroded Hilly Loess Plateau[J]. Bulletin of Soiland Water Conservation, 2008, 27(4): 17-21.
DOI：

DAI Quan-hou, LIU Guo-bin, XUE Sha, et al. Impacts of Slope Cropland Rebuilding on Soil Labile Organic Matter and Carbon Management Index in the Eroded Hilly Loess Plateau[J]. Bulletin of Soiland Water Conservation, 2008, 27(4): 17-21. DOI：

摘要

采用时空互代法

在典型侵蚀环境纸坊沟流域内选取营造果园和修建梯田两种坡耕地改造模式的土壤样品为研究对象

以坡耕地为参照

分析了植被恢复过程中土壤有机碳(TOC)、活性有机碳(LOC)、非活性有机碳(NLOC)及碳库管理指数的演变特征。结果表明

坡耕地改造为梯田后

土壤碳库各组分随改造年限显著增加。碳库指数(CPI)和碳库管理指数(CPMI)总体呈现逐渐增加趋势。改造为果园后

TOC

LOC和NLOC表现规律不一

但总体呈现波动式上升。CPI和CPMI随年限波动式上升

其后CPI逐渐趋于稳定

而CPMI开始缓慢回落

30 a时仍较坡耕地增加。研究表明

通过工程和营造果园可以提高土壤碳库各组分含量

使土壤经营和管理趋于科学化

土壤质量向良性发展。相关性分析说明有机碳、活性有机碳、非活性有机碳、碳库指数、碳库管理指数与土壤主要肥力因子相关性极其密切

可以作为反映坡耕地改造过程中土壤质量评价的指标。

Abstract

Zhifanggou watershed of typical erosion environment was regarded as a study area and the soil samples of planting orchard and building terrace were viewed as the objects.The interchangeable space-time method was adopted and a slope cropland was selected as a contrast.Several indexes were analyzed such as TOC

LOC

NLOC

and the evolution characteristics of carbon management index in the period of ecological restoration.The study indicates that the content of soil carbon for each group of soil samples was increased drastically with the increase in the time of conservation by building terrace.The carbon index and the carbon management index were increased steadily.The increasing range of the carbon index tended to balance and the carbon management index was declined gradually.Apparently

the content of soil carbon for each group of soil samples is increased by planting orchard.Soil management has been improved and soil quality has developed in a sound way.Moreover

correlation analysis shows that soil fertility factors have intimate relations to TOC

LOC

NLOC

carbon index

and carbon management index.The five indexes may be regarded as the indexes reflecting the evolvement of soil quality in the period of ecological restoration.

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