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[1]GUAN Jinhong,ZHANG Kedong,DENG Lei,et al.Soil Organic Carbon Density and Relationship with Species Diversity in Pedigreed Spruce at Natural Forest and Plantation Scales[J].Research of Soil and Water Conservation,2016,23(02):49-54,59.

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Soil Organic Carbon Density and Relationship with Species Diversity in Pedigreed Spruce at Natural Forest and Plantation Scales

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 23 Number of periods: 2016 02 Page number: 49-54,59 Column: Public date: 2016-04-28

Title:: Soil Organic Carbon Density and Relationship with Species Diversity in Pedigreed Spruce at Natural Forest and Plantation Scales

Author(s):: GUAN Jinhong^1,5, ZHANG Kedong⁴, DENG Lei³, ZHANG Jianguo^1,5, HE Qiuyue², 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. Key Laboratory of Environment and Ecology of Education Ministry in West China, Northwest A & F University, Yangling, Shaanxi 712100, China;
4. Gansu Taohe Forest Bureau, Gannan, Gansu 747600, China

Keywords:: Picea asperata; planations; natural forests; forest age; soil organic carbon density; species diversity

CLC:: S718.5

DOI:: -

Abstract:: Different-aged forests (including young forest, middle-aged forest, pre-mature forest and mature forest) of both plantations and natural forests of spruce (Picea asperata) were systematically investigated in Gannan Tibetan Autonomous Prefecture to explore the relationship between species diversity and soil organic carbon (SOC) density. Vertical distribution of SOC content and density, and species diversity, in both plantations and natural forests were analyzed. The results showed that SOC contents were highest in the top soil in different-aged forests of both natural forests and plantations, and decreased gradually with soil depth. SOC densities were highest in the deep soil layer(50—100 cm)in different-aged forests of both natural forests and plantations except the natural mature forest. Moreover, SOC content and density varied insignificantly with forest ages(p > 0.05). SOC density in spruce plantations increased, whereas SOC density in spruce natural forests decreased along the ages. Redundancy discriminate analysis (RDA) showed that SOC densities of 0—10, 10—20, 20—30, 30—50 cm in spruce plantations had a positive relationship with species richness (S), Shannon-Wiener (H’), Simpson (D) and Pielou (J_sw), but a negative relationship with Alatalo (E_a). By contrast, SOC densities of 0—10, 10—20 and 20—30 cm in spruce natural forests had a positive relationship with the five indices mentioned above.

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