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[1]Wei Yajuan,Liu Meiying,Xie Yunhu,et al.Study on Soil Organic Carbon of Plant Communities in Enclosed Area of Xilamuren Desert Grassland[J].Research of Soil and Water Conservation,2024,31(01):35-43.[doi:10.13869/j.cnki.rswc.2024.01.015]

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Study on Soil Organic Carbon of Plant Communities in Enclosed Area of Xilamuren Desert Grassland

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 31 Number of periods: 2024 01 Page number: 35-43 Column: Public date: 2024-02-20

Title:: Study on Soil Organic Carbon of Plant Communities in Enclosed Area of Xilamuren Desert Grassland

Author(s):: Wei Yajuan¹, Liu Meiying², Xie Yunhu¹, Gao Yuhan¹, Liu Meiping¹, Yue Puqing¹, Liu Lanbo³; (1.Department of Resource and Environment, Baotou Teachers' College, Baotou, Inner Mongolia 014030, China; 2.Inner Mongolia Key Laboratory of Soil Quality and Nutrient Resource, College of Grassland, Resources and Environment, Inner Mongolia Agricultural University, Hohhot 010018, China; 3.Baotou Meteorological Bureau of Inner Mongolia Autonomous Region, Baotou, Inner Mongolia 014030, China)

Keywords:: plant community; root biomass; organic carbon content; soil mechanical composition; enclosed area; Xilamuren

CLC:: S158.3

DOI:: 10.13869/j.cnki.rswc.2024.01.015

Abstract:: The aims of this study are To clarify soil organic carbon content of each plant community and to provide a theoretical basis for grassland conservation. [Methods]Six plant communities(Stipa breviflora, Koeleria cristata, Leymus chinensis, Stipa krylovii, Convolvulus ammannii, Allium mongolicum)in the enclosed area of Xilamuren Desert Grassland were studied for soil mechanical composition, soil organic carbon content and root characteristics of different plant communities.[Results](1)The soil mechanical composition of soil depth of 0—30 cm in six plant communities was mainly composed of silt and extremely fine sand, with the average values of 26.50%～54.62% and 16.90%～34.08%, respectively.(2)The root biomass of six plant communities gradually decreased with soil depth, and the total root biomass was between 229.21 and 731.71 g/m². Judging from characteristics of root distribution, the root distribution of Stipa breviflora was ‘E' type distribution, and the root distributions other plant communities were ‘V' type distribution.(3)Soil organic carbon content of six plant communities gradually decreased with soil depth. The average organic carbon content in 0—30 cm ranged from 6.07 to 11.75 g/kg.(4)There was a significant positive correlation between root biomass, soil organic carbon and clay, and a significant positive correlation with silt, indicating that the more soil particles and clay content, the richer the root biomass and soil organic carbon of different plant communities. [Conclusion] Enclosure could effectively promote the increase of soil organic carbon, but organic carbon varied in response to different vegetation communities. The accuracy of grassland organic carbon storage should be determined according to the characteristics of grassland vegetation communities.

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Last Update: 2024-02-20