[1]QIAO Leilei,LI Yuanze,ZHAI Jiaying,et al.Effects of Vegetation Restoration Pattern on Soil Carbon Fractions in Loess Hilly Region[J].Research of Soil and Water Conservation,2019,26(05):14-20.
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Effects of Vegetation Restoration Pattern on Soil Carbon Fractions in Loess Hilly Region

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 26 Number of periods: 2019 05 Page number: 14-20 Column: Public date: 2019-09-06
Title:
Effects of Vegetation Restoration Pattern on Soil Carbon Fractions in Loess Hilly Region
Author(s):
QIAO Leilei1, LI Yuanze2, ZHAI Jiaying3,4, SONG Yahui3,4, LIU Guobin1,3
1. Institute of Soil and Water Conservation, Northwest A & F University, Yangling, Shaanxi 712100, China;
2. College of Forestry, Northwest A & F University, Yangling, Shaanxi 712100, China;
3. State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Soil and Water Conservation, Chinese Academy of Sciences and ministry of Water Resources, Yangling, Shaanxi 712100, China;
4. University of Chinese Academy of Sciences, Beijing 100049, China
Keywords:
loess hilly region; vegetation restoration; soil carbon pool fractions
CLC:
S151.9
DOI:
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Abstract:
In order to understand the effect of different restoration patterns on soil carbon fractions in loess hilly region, and find the soil carbon pool’s quality factors that can reflect the vegetation restoration process, six 30-year vegetation restoration sample plots on the Panlongshan Mountain in the Zhifanggou watershed were chosen to analyze the variation characteristics of soil organic carbon (SOC), potassium dichromate readily oxidized carbon (ROC), potassium permanganate labile organic carbon (LOC), negative organic carbon (NLOC), microbial biomass carbon (MBC), dissolved organic carbon (DOC), salt extraction of organic carbon (SEOC), hot-water extractable carbon (HWEC), hot water extractable carbohydrate (HWC) during the vegetation restoration process, and the slope cropland and regional climax community (Platycladus orientailis L.) were used as controls. The results showed that low soil carbon fraction contents were observed in the slope cropland due to unreasonable utilization, and different vegetation restoration significantly increased the soil active carbon fractions, SOC, ROC, LOC, NLOC, MBC, SEOC, DOC, HWEC and HWC increased by 109%~228%, 153%~338%, 94%~212%, 102%~271%, 109%~142%, 117%~288%, 66%~149%, 166%~279% and 128%~217%, respectively, compared to slope cropland; however, compared with natural Platycladus orientailis L., the contents of those carbon fractions under different vegetation restoration patterns decreased by 55.4%~72.4%, 57.2%~75.3%, 50.1%~69.0%, 59.9%~78.2%, 60.2%~65.9%, 6.7%~48.6%, 2.2%~35.1%, 40.1%~58.3% and 55.6%~67.8%, respectively, carbon content was higher in the mixed forest, indicating that the mixed forest has a better restoration effect than pure forest and grassland. The sensitivity of carbon fractions in different restoration patterns and different carbon fractions in the same restoration pattern showed large variation, and not all carbon fractions are more sensitive than SOC. The corresponding indicators should be selected according to the different vegetation restoration patterns when using soil carbon fractions as soil quality indicators.
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