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Effects of freeze-thaw cycles on aggregate-associated organic carbon and glomalin-related soil protein in natural-succession grassland and Chinese pine forest on the Loess Plateau

2021年10月27日 15:45 伟德BETVLCTOR1946 点击:[]

作 者:Xiao, LieZhang, YangLi, PengXu, GuoceShi, PengZhang, Yi

作者机构:State Key Laboratory of Eco-hydraulics in Northwest Arid Region of ChinaXi'an University of Technology No.5 South Jinhua Road Xi'anShaanxi Province710048 China

出 版 物:《Geoderma》

年 卷 期:2019年第334卷

页 面:1-8

核心收录:

中图分类:S1[农业科学-农业基础科学]

学科分类:09[农学]

基 金:This study was supported by the National Key Research and Development Program of China ( 2016YFC0402404 )the National Natural Science Foundation of China ( 417016034133085841471226and 41731289 )and the Consultation and Evaluation Project of the Chinese Academy of Sciences ( 2018-Z02-A-008 ).

主 题:AggregatesForestryFreezingLandformsOrganic carbonProteinsRestorationSedimentsSoil conservationSoilsSystemonchipThawingVegetationAggregate stabilityFreezethawGlomalinrelated soil proteinGRSPMean weight diameterSoil aggregate stabilitySoil organic carbonVegetation restoration

摘 要:Glomalin-related soil protein (GRSP) is a hydrophobic glycoprotein that can protect soil organic carbon (SOC) from decomposition by promoting the formation of soil aggregates. Few studies, however, have evaluated the response of aggregate-associated SOC and GRSP to freeze-thaw cycles (FTs) under different patterns of vegetation restoration. Soil samples were collected from three typical natural-succession grasslands (dominated by Artemisia capillaris, A. sacrorum, and Bothriochloa ischaemum) and a Chinese pine (Pinus tabuliformis) forest before and after natural FTs during a winter-spring season on the Loess Plateau in China. The soil aggregate stability and concentrations of SOC, easily extractable GRSP (EE-GRSP) and total GRSP (T-GRSP) in different aggregate fractions were measured. The FTs decreased the proportion of 5.0 mm wet-sieved fractions, increased the proportion of © 2018

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