[1]CUI Jing,CHEN Yun-ming,CAO Yang,et al.Evolution Characteristics of Soil Organic Carbon Components and Carbon Management Index in Caragana microphylla Plantations in Loess Hilly Region[J].Research of Soil and Water Conservation,2013,20(01):52-56.
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Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
20
Number of periods:
2013 01
Page number:
52-56
Column:
Public date:
2013-02-28
- Title:
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Evolution Characteristics of Soil Organic Carbon Components and Carbon Management Index in Caragana microphylla Plantations in Loess Hilly Region
- Author(s):
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CUI Jing1, CHEN Yun-ming2,3, CAO Yang2, WANG Qiong-fang1, HUANG Jia-jian4, WANG Lin-lin5
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1. College of Natural Resources and Environment, Northwest A & F University, Yangling, Shaanxi 712100, China;
2. State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Northwest A & F University, Yangling, Shaanxi 712100, China;
3. Institute of Soil and Water Conservation, Northwest A & F University, Yangling, Shaanxi 712100, China;
4. Yunnan Jinyu Ecological Engineering Consultation Co., Ltd, Kunming 650244, China
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- Keywords:
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loess hilly region; Caragana microphylla; soil organic carbon; carbon management index
- CLC:
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S153.6+21
- DOI:
-
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- Abstract:
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Based on the spatiotemporal substitution method, the evolution characteristics of soil organic carbon components and carbon management index was investigate in Caragana microphylla plantations with age sequence of 10 a, 17 a, 30 a, 34 a, 40 a and 50 a in the loess hilly region. The results showed that: the contents of soil organic carbon and soil labile organic carbon both increased with the growth years of C. microphylla, and had similar variation trend with the lowest content in the 10-year plantations and the steady level in 40 to 50-year plantations. But the peak content of soil organic carbon and soil labile organic carbon appeared in different ages, the highest soil organic carbon content was found in the 34-year plantations, with the value of 4.29 g/kg, while the highest soil labile organic carbon content presented in the 40-year plantations, with the value of 0.83 g/kg. Soil carbon management index increased with the C. microphylla growth. At the depth of 0—20 cm, the carbon management index of C. microphylla plantations had significantly increased from 54.2% to 153.0% compared with that in the 10-year plantations, but at the depth of 20—40 cm, soil carbon management index did not increased greatly, and it even decreased from 8.0% to 16.9% during the 17-year and 30-year plantations. Correlation analysis showed that there was a very significant positive correlation between soil total organic carbon content and soil labile organic carbon content, and soil carbon components also had significant or very significant relationship with soil fertility index. Carbon pool index and carbon management index had significant relationship with soil carbon components and soil fertility indexes. The results indicated that planting C. microphylla will improve the soil fertility. Carbon pool index and carbon management index can be used as monitoring factors to reflect vegetation recovery in loess hilly region.