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[1]SONG Bianlan,GUAN Jinhong,DU Sheng.Carbon and Nitrogen Densities and Their Allocation Characteristics in A Black Locust Plantation and An Oak Forest in the Loess Hilly Region[J].Research of Soil and Water Conservation,2016,23(04):55-59,65.

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Carbon and Nitrogen Densities and Their Allocation Characteristics in A Black Locust Plantation and An Oak Forest in the Loess Hilly Region

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 23 Number of periods: 2016 04 Page number: 55-59,65 Column: Public date: 2016-04-28

Title:: Carbon and Nitrogen Densities and Their Allocation Characteristics in A Black Locust Plantation and An Oak Forest in the Loess Hilly Region

Author(s):: SONG Bianlan^1,3, GUAN Jinhong^1,3, DU Sheng^1,2; 1. Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Yangling, Shaanxi 712100, China;
2. Institute of Soil and Water Conservation, Northwest A & F University, Yangling, Shaanxi 712100, China;
3. University of Chinese Academy of Sciences, Beijing 100049, China

Keywords:: carbon and nitrogen contents; carbon and nitrogen densities; Black locust plantation; Oak forest; Loess hilly region

CLC:: S718.5

DOI:: -

Abstract:: We examined the contents and distribution characteristics of organic carbon and total nitrogen in a black locust plantation and a natural oak forest in the semiarid loess hilly region. The results showed that:carbon contents in vegetation layers declined vertically in the order:arbor layer > shrub and herb layer > litter layer; leaf and stem > branch > root in arbor and shrub layers, whereas aboveground components > underground components in the herb layer. The ecosystem carbon density was higher in the oak forest (165.86 t/hm²) than that of the locust plantation (138.93 t/hm²). The ecosystem nitrogen density showed no significant differences between the two communities. The distribution of carbon and nitrogen densities ranked in the order:soil layer > arbor layer > litter layer > shrub and herb layers. The soil carbon density accounted for 51.1%~53.6% of the total ecosystem carbon density. The soil nitrogen density accounted for 71.4%~84.4% of the total ecosystem nitrogen density. The results suggest that controlling soil and water loss is important to maintain the ecological environment and soil carbon sequestration potential in this area.

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