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火烧对拉萨地区湿草甸湿地土壤养分特征的影响

王 丽 王兆锋 张镱锂 土艳丽 尚二萍

王 丽, 王兆锋, 张镱锂, 土艳丽, 尚二萍. 火烧对拉萨地区湿草甸湿地土壤养分特征的影响[J]. 环境科学研究, 2013, 26(5): 549-554.
引用本文: 王 丽, 王兆锋, 张镱锂, 土艳丽, 尚二萍. 火烧对拉萨地区湿草甸湿地土壤养分特征的影响[J]. 环境科学研究, 2013, 26(5): 549-554.
WANG Li, WANG Zhao-feng, ZHANG Yi-li, TU Yan-li, SHANG Er-ping. Effects of Fire Burning on Wet Meadow Soil Nutrient Conditions in Lhasa[J]. Research of Environmental Sciences, 2013, 26(5): 549-554.
Citation: WANG Li, WANG Zhao-feng, ZHANG Yi-li, TU Yan-li, SHANG Er-ping. Effects of Fire Burning on Wet Meadow Soil Nutrient Conditions in Lhasa[J]. Research of Environmental Sciences, 2013, 26(5): 549-554.

火烧对拉萨地区湿草甸湿地土壤养分特征的影响

基金项目: 国家重点基础研究发展计划(973)项目(2010CB951704);国家自然科学基金项目(40301001);国家科技支撑计划项目(2007BAC06B03)

Effects of Fire Burning on Wet Meadow Soil Nutrient Conditions in Lhasa

  • 摘要: 基于对拉萨地区典型湿草甸火烧样地与对照样地内表层土壤pH、有机质、全量及速效养分含量特征的对比分析,初步探讨了火烧干扰对高原湿草甸表层土壤特征的影响. 结果表明:土壤pH在6.06~6.85之间,火烧干扰导致土壤pH升高;土壤中w(全氮)、w(全钾)分别为2.35~5.34、23.33~28.72g/kg,火烧干扰使其值下降;火烧对土壤中w(全磷)无明显响应;火烧后土壤中w(有机质)(53.97~144.57g/kg)下降,并且与土壤中w(全氮)的变化趋势一致. 土壤中w(速效氮)的季节性差异较大,火烧干扰使生长季初期表层土壤中的w(速效氮)减少,而在生长季旺盛期则增加,w(速效氮)占w(全氮)的比例变化一致;w(速效磷)在2个生长阶段总体增加,占w(全磷)的比例升高,以平地中变化最为明显;w(速效钾)及其占w(全钾)的比例在生长季初期显著增加,后期则下降明显.

     

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出版历程
  • 收稿日期:  2012-11-19
  • 修回日期:  2013-02-02
  • 刊出日期:  2013-05-25

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