[1]WANG Yipei,SUN Meimei,CHENG Ranran,et al.Accumulation of Soil Organic Carbon and Its Influencing Factors in Coniferous Plantations in the Midwestern Loess Plateau[J].Research of Soil and Water Conservation,2020,27(03):30-36.
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Accumulation of Soil Organic Carbon and Its Influencing Factors in Coniferous Plantations in the Midwestern Loess Plateau
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
27
Number of periods:
2020 03
Page number:
30-36
Column:
目次
Public date:
2020-04-20
- Title:
- Accumulation of Soil Organic Carbon and Its Influencing Factors in Coniferous Plantations in the Midwestern Loess Plateau
- CLC:
- S718.5
- DOI:
- -
- Abstract:
- The shallow soil of forest land is the key layer for the transport of litter organic matter to soil carbon pool, which is indicative of soil organic carbon accumulation. In order to explore the soil carbon sequestration function of three kinds of coniferous plantations in the midwestern Loess Plateau, the effects of stand conditions, litter composition and environmental factors on the accumulation of organic carbon in shallow soils were studied based on the sample land information obtained from field investigation and the sample analysis of litter and soils. The results show that, the age of the forest and the carbon density of the shallow soil have the very significant correlation in this study area; the annual average temperature has no significant effect on the carbon density of the shallow soil; in various areas above 2 000 m above sea level, there is an extremely significant positive correlation between altitude and the carbon density of shallow soil, while there is no such correlation when the altitude is less than 2 000 m; there is the positive correlation between the average annual rainfall of various areas and the carbon density of shallow soil, and there is the very significant negative correlation between the ratio of carbon to nitrogen of litter and the carbon density of shallow soil. According to the results from the random forest approach to sort the importance of each influence factor on soil carbon density function, the total explanatory rate of the those factors to the carbon density of shallow soil changes is 66.2%, among which the ratio of carbon to nitrogen of litter is the dominant factor on carbon accumulation in shallow soil.
- References:
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Last Update:
2020-04-30