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[1]FANG Xin,GUO Xuelian,ZHENG Rongbo,et al.Effect of Difference Grazing Distributions on Soil Ecological Stoichiometric Characteristics in Peatland of Northwest Yunnan Plateau[J].Research of Soil and Water Conservation,2020,27(02):9-14.

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Effect of Difference Grazing Distributions on Soil Ecological Stoichiometric Characteristics in Peatland of Northwest Yunnan Plateau

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 27 Number of periods: 2020 02 Page number: 9-14 Column: Public date: 2020-03-30

Title:: Effect of Difference Grazing Distributions on Soil Ecological Stoichiometric Characteristics in Peatland of Northwest Yunnan Plateau

Author(s):: FANG Xin^1,2, GUO Xuelian^1,2, ZHENG Rongbo³, FU Qian^1,2; (1.College of Wetlands, Southwest Forestry University, Kunming 650224, China; 2.National Plateau Wetlands Research Center, Southwest Forestry University, Kunming 650224, China; 3.College of Chemical Engineering, Southwest Forestry University, Kunming 650224, China)

Keywords:: grazing; soil nutrient stoichiometry; ecoenzymatic stoichiometry; peatland

CLC:: S152; S153; S154.1

DOI:: -

Abstract:: In order to clarify the influence and mechanism of grazing process on the stoichiometric characteristics of peat swamp soil, provide theoretical basis for the research on disturbance of grazing to wetland ecosystem and nutrient cycling of peatland, a typical peatland was selected to study the effect of pig arching(ZG)and yak trampling(JT)on soil ecological stoichiometric characteristics in northwestern Yunnan plateau, and the contents of moisture, pH value, soil total organic carbon(TOC), total nitrogen(TN), total phosphorus(TP), ammonium(NH⁺₄-N), nitrate(NO^-₃-N)and soil ecological stoichiometric characteristics were investigated. The results showed that livestock grazing reduced soil moisture, pH value, TN, TOC, but increased TP, the soil NO^-₃-N was increased by ZG, grazing reduced soil nutrient stoichiometry, and there was a significant difference in C/P between JT and ZG (p<0.05); grazing decreased MBC/MBN and MBC/MBP, but increased MBN/MBP; ZG had stronger effects on microbial ecological stoichiometry than JT; grazing increased soil ecoenzyme stoichiometry. Redundancy analysis showed that TP, moisture, bulk density, NO^-₃-N and TOC were primary environmental factors affecting soil ecological stoichiometry. The MBC/MBN and MBN/MBP were positively related to the ecological enzyme stoichiometry, while the MBC/MBP showed the opposite trend. N/P was negatively correlated with the ecological enzyme activity, the soil C/N and C/P were positively correlated with ecoenzyme stoichiometry. The changes of soil nutrient stoichiometry affected microbial ecological stoichiometry and ecoenzyme stoichiometry.

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Last Update: 2020-02-25