[1]YANG Xinguo,QU Wenjie,SONG Naiping,et al.Soil Organic Carbon and Its Component Dynamics Following the Development Years of the Pumping-Yellow River Irrigation Area in Ningxia[J].Research of Soil and Water Conservation,2015,22(04):122-126.
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Soil Organic Carbon and Its Component Dynamics Following the Development Years of the Pumping-Yellow River Irrigation Area in Ningxia
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
22
Number of periods:
2015 04
Page number:
122-126
Column:
Public date:
2015-08-28
- Title:
- Soil Organic Carbon and Its Component Dynamics Following the Development Years of the Pumping-Yellow River Irrigation Area in Ningxia
- Keywords:
- soil organic carbon; labile organic carbon; chemical stability of soil organic carbon; pumping-Yellow River irrigation area; time scales
- CLC:
- S152.3
- DOI:
- -
- Abstract:
- We investigated the dynamics on two time scales of soil organic carbon content, components and chemical stability in middle Ningxia Yellow River irrigation area over the past 40 years. The results showed that soil organic carbon in this area showed a progressive evolution with the years of development on the decade scale(15~35 years,10 years as an interval), marked by a significant change of the distribution of soil labile organic carbon in 0—40 cm layer(15 years), soil labile organic carbon content in 10—20 cm layer (25 years), and soil organic carbon content in 10—40 cm layer(35 years). During this process, surface soil organic carbon content and composition in 0—10 cm layer, chemical stability of soil organic carbon in 0—40 cm layer remained unchanged. On the year scale (0~12 years, 3 years as an invertal), total organic carbon and soil labile organic carbon contents of the plow layer (0—40 cm) increased firstly and then decreased. While the chemical stability of organic carbon kept stable in addition to the first three years of sharp decline. For the changes at the multi-scale of soil organic carbon in middle Ningxia Yellow River irrigation area, the quick and unstable changes occurred on the smaller time scale. But on the larger time scales, the contents of total soil organic carbon and labile soil organic carbon kept the gentle and gradual change, and increased significantly at last until 35 years. while organic carbon stability exhibited the stability across all the scales.
- References:
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1900-01-01