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Soil Carbon Stock and Flux in Plantation Forest and Grassland Ecosystems in Loess Plateau, China

HU Chanjuan LIU Guohua FU Bojie CHEN Liding LYU Yihe GUO Lei

HU Chanjuan, LIU Guohua, FU Bojie, CHEN Liding, LYU Yihe, GUO Lei. Soil Carbon Stock and Flux in Plantation Forest and Grassland Ecosystems in Loess Plateau, China[J]. 中国地理科学, 2014, (4): 423-435. doi: 10.1007/s11769-014-0700-7
引用本文: HU Chanjuan, LIU Guohua, FU Bojie, CHEN Liding, LYU Yihe, GUO Lei. Soil Carbon Stock and Flux in Plantation Forest and Grassland Ecosystems in Loess Plateau, China[J]. 中国地理科学, 2014, (4): 423-435. doi: 10.1007/s11769-014-0700-7
HU Chanjuan, LIU Guohua, FU Bojie, CHEN Liding, LYU Yihe, GUO Lei. Soil Carbon Stock and Flux in Plantation Forest and Grassland Ecosystems in Loess Plateau, China[J]. Chinese Geographical Science, 2014, (4): 423-435. doi: 10.1007/s11769-014-0700-7
Citation: HU Chanjuan, LIU Guohua, FU Bojie, CHEN Liding, LYU Yihe, GUO Lei. Soil Carbon Stock and Flux in Plantation Forest and Grassland Ecosystems in Loess Plateau, China[J]. Chinese Geographical Science, 2014, (4): 423-435. doi: 10.1007/s11769-014-0700-7

Soil Carbon Stock and Flux in Plantation Forest and Grassland Ecosystems in Loess Plateau, China

doi: 10.1007/s11769-014-0700-7
基金项目: Under the auspices of National Basic Research Program of China (No. 2007CB407205), National Natural Science Foundation of China (No. 40871085)
详细信息
    通讯作者:

    LIU Guohua

Soil Carbon Stock and Flux in Plantation Forest and Grassland Ecosystems in Loess Plateau, China

Funds: Under the auspices of National Basic Research Program of China (No. 2007CB407205), National Natural Science Foundation of China (No. 40871085)
More Information
    Corresponding author: LIU Guohua
  • 摘要: Carbon sequestration occurs when cultivated soils are re-vegetated. In the hilly area of the Loess Plateau, China, black locust(Robinia pseudoacacia) plantation forest and grassland were the two main vegetation types used to mitigate soil and water loss after cultivation abandonment. The purpose of this study was to compare the soil carbon stock and flux of these two types of vegetation which restored for 25 years. The experiment was conducted in Yangjuangou catchment in Yan'an City, Shaanxi Province, China. Two adjacent slopes were chosen for this study. Six sample sites were spaced every 35-45 m from summit to toe slope along the hill slope, and each sample site contained three sampling plots. Soil organic carbon and related physicochemical properties in the surface soil layer (0-10 cm and 10-20 cm) were measured based on soil sampling and laboratory analysis, and the soil carbon dioxide (CO2) emissions and environmental factors were measured in the same sample sites simultaneously. Results indicated that in general, a higher soil carbon stock was found in the black locust plantation forest than that in grassland throughout the hill slope. Meanwhile, significant differences in the soil carbon stock were observed between these two vegetation types in the upper slope at soil depth 0-10 cm and lower slope at soil depth 10-20 cm. The average daily values of the soil CO2 emissions were 1.27 mmol/(m2·s) and 1.39 mmol/(m2·s) for forest and grassland, respectively. The soil carbon flux in forest covered areas was higher in spring and less variation was detected between different seasons, while the highest carbon flux was found in grassland in summer, which was about three times higher than that in autumn and spring. From the carbon sequestration point of view, black locustplantation forest on hill slopes might be better than grassland because of a higher soil carbon stock and lower carbon flux.
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Soil Carbon Stock and Flux in Plantation Forest and Grassland Ecosystems in Loess Plateau, China

doi: 10.1007/s11769-014-0700-7
    基金项目:  Under the auspices of National Basic Research Program of China (No. 2007CB407205), National Natural Science Foundation of China (No. 40871085)
    通讯作者: LIU Guohua

摘要: Carbon sequestration occurs when cultivated soils are re-vegetated. In the hilly area of the Loess Plateau, China, black locust(Robinia pseudoacacia) plantation forest and grassland were the two main vegetation types used to mitigate soil and water loss after cultivation abandonment. The purpose of this study was to compare the soil carbon stock and flux of these two types of vegetation which restored for 25 years. The experiment was conducted in Yangjuangou catchment in Yan'an City, Shaanxi Province, China. Two adjacent slopes were chosen for this study. Six sample sites were spaced every 35-45 m from summit to toe slope along the hill slope, and each sample site contained three sampling plots. Soil organic carbon and related physicochemical properties in the surface soil layer (0-10 cm and 10-20 cm) were measured based on soil sampling and laboratory analysis, and the soil carbon dioxide (CO2) emissions and environmental factors were measured in the same sample sites simultaneously. Results indicated that in general, a higher soil carbon stock was found in the black locust plantation forest than that in grassland throughout the hill slope. Meanwhile, significant differences in the soil carbon stock were observed between these two vegetation types in the upper slope at soil depth 0-10 cm and lower slope at soil depth 10-20 cm. The average daily values of the soil CO2 emissions were 1.27 mmol/(m2·s) and 1.39 mmol/(m2·s) for forest and grassland, respectively. The soil carbon flux in forest covered areas was higher in spring and less variation was detected between different seasons, while the highest carbon flux was found in grassland in summer, which was about three times higher than that in autumn and spring. From the carbon sequestration point of view, black locustplantation forest on hill slopes might be better than grassland because of a higher soil carbon stock and lower carbon flux.

English Abstract

HU Chanjuan, LIU Guohua, FU Bojie, CHEN Liding, LYU Yihe, GUO Lei. Soil Carbon Stock and Flux in Plantation Forest and Grassland Ecosystems in Loess Plateau, China[J]. 中国地理科学, 2014, (4): 423-435. doi: 10.1007/s11769-014-0700-7
引用本文: HU Chanjuan, LIU Guohua, FU Bojie, CHEN Liding, LYU Yihe, GUO Lei. Soil Carbon Stock and Flux in Plantation Forest and Grassland Ecosystems in Loess Plateau, China[J]. 中国地理科学, 2014, (4): 423-435. doi: 10.1007/s11769-014-0700-7
HU Chanjuan, LIU Guohua, FU Bojie, CHEN Liding, LYU Yihe, GUO Lei. Soil Carbon Stock and Flux in Plantation Forest and Grassland Ecosystems in Loess Plateau, China[J]. Chinese Geographical Science, 2014, (4): 423-435. doi: 10.1007/s11769-014-0700-7
Citation: HU Chanjuan, LIU Guohua, FU Bojie, CHEN Liding, LYU Yihe, GUO Lei. Soil Carbon Stock and Flux in Plantation Forest and Grassland Ecosystems in Loess Plateau, China[J]. Chinese Geographical Science, 2014, (4): 423-435. doi: 10.1007/s11769-014-0700-7
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