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[1]Wang Jun,Man Xiuling.Short Term Effects of Litter and Sod Layer Removal on Soil Active Organic Carbon in Typical Forests in Cold Temperate Zone[J].Research of Soil and Water Conservation,2024,31(01):168-177.[doi:10.13869/j.cnki.rswc.2024.01.044]

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Short Term Effects of Litter and Sod Layer Removal on Soil Active Organic Carbon in Typical Forests in Cold Temperate Zone

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 31 Number of periods: 2024 01 Page number: 168-177 Column: Public date: 2024-02-20

Title:: Short Term Effects of Litter and Sod Layer Removal on Soil Active Organic Carbon in Typical Forests in Cold Temperate Zone

Author(s):: Wang Jun, Man Xiuling; (School of Forestry, Northeast Forestry University, Harbin 150040, China)

Keywords:: forest soil; remove litter; remove sod layer; activated organic carbon

CLC:: S714.2

DOI:: 10.13869/j.cnki.rswc.2024.01.044

Abstract:: [Objective] The aims of this study are to explore the effects of litter and sod layer removal on soil active organic carbon in cold temperate forests, and to provide scientific reference for the study of soil carbon cycle in cold temperate forests in China. [Methods] Three typical forests(Betula platyphylla forest, Pinus sylvestris var. mongolica forest and Larix gmelinii forest)in the northern part of the Greater Khingan Mountains were taken as the research objects. Four treatments were set up in the three forest types, including control, litter removal, sod layer removal and both litter and sod layer removal. Soil samples were collected from different soil layers(0—10 cm and 10—20 cm)of each treatment in September 2021 to study the soil active organic carbon components and their influencing factors. [Results] In the 0—10 cm soil layer, compared with the control, there was no significant change in the contents of soil soluble organic carbon and readily oxidizable organic carbon after litter removal in the Betula platyphylla forest and Pinus sylvestris var. mongolica forest, but significantly decreased by 25.49% and 39.40% in the Larix gmelinii forest. Soil microbial biomass carbon in Betula platyphylla forest and Larix gmelinii forest decreased by 19.26% and 18.86%, respectiveley, but varied slightly in Pinus sylvestris var. mongolica forest in litter removal treatment. The contents of soil dissolved organic carbon and readily oxidizable organic carbon decreased significantly by 16.08%, 60.69% and 17.38%, 17.33% in Betula platyphylla forest and Pinus sylvestris var. mongolica forest, respectively, after removing the sod layer, but there was no significant change in Larix gmelinii forest. Soil microbial biomass carbon contents were significantly reduced by 19.47%～42.02% in the three forest types. The contents of soil microbial biomass carbon and readily oxidizable organic carbon in the three forest types were significantly reduced by 22.03%～27.01% and 52.22%～57.01%, respectiveley, after removing litter and sod layer at the same time. The contents of soil dissolved organic carbon decreased by 11.25%～22.18%, among which the Betula platyphylla forest and the Pinus sylvestris var. mongolica forest forest reached a significant level. In the 10—20 cm soil layer, there were no significant differences in soil dissolved organic carbon and soil microbial biomass carbon among all treatments in three typical forests. Sod layer removal treatment and both litter layer and sod layer removal treatment significantly decreased soil readily oxidized organic carbon in Betula platyphylla forest and Pinus sylvestris var. mongolica forest, respectively. There was no significant differences in soil readily oxidized organic carbon among different treatments in Larix gmelinii forest. The components of soil active organic carbon in the three forest types were significantly positively correlated with soil total organic carbon, total nitrogen and water content, and significantly negatively correlated with soil pH. [Conclusion] The removal of litter and sod layer reduced the contents of soil active organic carbon, and the existence of litter and sod layer were beneficial to the formation and accumulation of soil active organic carbon.

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Last Update: 2024-02-20