Comparison of soil properties under fencing and grazing in alpine meadow on Qinghai-Tibet Plateau
Comparison of soil properties under fencing and grazing in alpine meadow on Qinghai-Tibet Plateau
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发表时间：
2012
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通讯作者：
Xue Shi-xiao
中科院分区：
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作者：
Xue Shi-xiao
对比分析了两种条件下土壤呼吸速率、根系生物量、土壤含水量、容重、土壤有机碳和全氮含量。结果表明：冬牧草甸土壤呼吸速率、容重和根系生物量均高于围栏草甸；冬牧草甸土壤含水量、有机碳和全氮含量均低于围栏草甸。高寒草甸适度放牧可提高土壤微生物活性，加速土壤氮和有机碳的矿化和分解。但适当排除放牧可以保持土壤养分，避免土壤有机质的流失。
Soil properties under two conditions(fenced without grazing since 2002 and continuously grazed in the winter) were compared in the alpine meadow on Qinghai-Tibet Plateau.Under the two conditions,soil respiration rate,root biomass,soil water content,bulk densities,soil organic carbon and total nitrogen contents were compared and analyzed.The results showed that the soil respiration rate,bulk density and root biomass at the winter-grazed meadow were higher than those at the fenced meadow;while the soil water content,organic carbon and total nitrogen contents at the winter-grazed meadow were lower than those at the fenced meadow.Moderate grazing in the alpine meadow could increase the activities of soil microbes and accelerate mineralization and decomposition of soil nitrogen and organic carbon.However,appropriate exclusion of grazing can maintain soil nutrients and avoid loss of soil organic matter.