[1]CAO Tingting,SUN Yingying,WANG Huanyuan,et al.Effects of Different Land Renovation Years on Soil Carbon Fixation[J].Research of Soil and Water Conservation,2019,26(02):86-92.
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Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
26
Number of periods:
2019 02
Page number:
86-92
Column:
Public date:
2019-04-28
- Title:
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Effects of Different Land Renovation Years on Soil Carbon Fixation
- Author(s):
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CAO Tingting1,2,3,4, SUN Yingying1,2,3,4, WANG Huanyuan1,2,3,4, DU Yichun1,2,3,4
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1. Shaanxi Provincial Land Engineering Construction Group Co., Ltd., Xi’an 710075, China;
2. Institute of Land Engineering and Technology, Shaanxi Provincial Land Engineering Construction Group Co., Ltd., Xi’an 710075, China;
3. Key Laboratory of Degraded and Unused Land Consolidation Engineering, Ministry of Natural Resources, Xi’an 710075, China;
4. Shaanxi Provincial Land Consolidation Engineering Technology Research Center, Xi’an 710075, China
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- Keywords:
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land remediation; different remediation period; carbon fixation
- CLC:
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F301;S153
- DOI:
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- Abstract:
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In order to analyze the impact of land consolidation on soil carbon sequestration and further explore the impact of land remediation projects on soil quality and carbon sequestration and storage, we took three types of land remediation projects such as sandy land, saline-alkaline land and abandoned housing sites as the examples. The results of this study showed that the improvement of soil carbon content in windy sandy land remediation could effectively increase the carbon density and carbon content. In the initial stage of remediation, due to disturbance of engineering measures, the organic carbon in the surface layer of sandy land decreased; but due to the crop harvesting demand, surface inorganic carbon increased with the increase in the number of years of cultivation, the total carbon, organic carbon, and inorganic carbon density in the sandy land were significantly higher than those before the remediation and two years after the remediation, and the growth of all soil layers was more than 30%. The quality of soil before treatment of abandoned housing plots was good, and the soil carbon content did not change significantly before and after remediation, but with the extension of planting years, the total carbon density increased by 40% in 0—10 cm layer and 34% in 10—20 cm layer after 7 years of remediation; organic carbon density increased by 83% and 53% in 0—10 cm layer and 10—20 cm layer, respectively, and carbon storage gradually increased with the years of remediation; carbon enrichment in surface sedimentation after saline-alkali soil remediation salts, as carbonates leached towards the deeper layers, inorganic carbons increased in deeper layers. With the increase of planting years, the surface inorganic carbon content increased significantly, the profile inorganic carbon reserves also increased significantly, the organic carbon reserves fluctuated little, and the total carbon reserves significantly increased. The wind-sand, abandoned homestead, and saline-alkali land remediation have a certain improvement effect on soil carbon retentive capacity, and the effect will be more obvious with the extension of the remediation period under the combined effects of crop planting and engineering measures.