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土地利用方式对洱海流域坝区土壤氮 磷 有机质含量的影响

孙莉 高思佳 储昭升 戴万宏

孙莉, 高思佳, 储昭升, 戴万宏. 土地利用方式对洱海流域坝区土壤氮 磷 有机质含量的影响[J]. 环境科学研究, 2016, 29(9): 1318-1324.
引用本文: 孙莉, 高思佳, 储昭升, 戴万宏. 土地利用方式对洱海流域坝区土壤氮 磷 有机质含量的影响[J]. 环境科学研究, 2016, 29(9): 1318-1324.
SUN Li, GAO Sijia, CHU Zhaosheng, DAI Wanhong. Effects of Land Use on Soil Nitrogen,Phosphorous and Organic Matter Contents in Flatland of Erhai Lake Basin[J]. Research of Environmental Sciences, 2016, 29(9): 1318-1324.
Citation: SUN Li, GAO Sijia, CHU Zhaosheng, DAI Wanhong. Effects of Land Use on Soil Nitrogen,Phosphorous and Organic Matter Contents in Flatland of Erhai Lake Basin[J]. Research of Environmental Sciences, 2016, 29(9): 1318-1324.

土地利用方式对洱海流域坝区土壤氮 磷 有机质含量的影响

基金项目: 国家水体污染控制与治理科技重大专项(2012ZX07105-002)

Effects of Land Use on Soil Nitrogen,Phosphorous and Organic Matter Contents in Flatland of Erhai Lake Basin

  • 摘要: 为了解洱海流域土地利用对土壤养分的影响,调查研究了土地利用方式、种植模式,并研究了其对洱海流域坝区土壤w(TN)、w(TP)、w(OM)(OM为有机质)、w(olsen-P)(olsen-P为速效磷)和w(NO3--N)的影响.结果表明:①流域坝区土壤中w(OM)、w(TN)较高,平均值为52.16和2.76 g/kg;w(olsen-P)较低,平均值为6.55 mg/kg.②对比农田、林地、裸地、园地4种土地利用方式,土壤中w(TN)、w(OM)、w(TP)、w(olsen-P)均呈农田>园地、林地>裸地的变化趋势.③种植模式对农田土壤养分影响有差异,水稻-大蒜模式下土壤的养分含量总体较高,w(TN)、w(OM)平均值分别为4.21、74.22 g/kg,是玉米-蚕豆模式的1.98、1.96倍;蔬菜模式土壤中w(NO3--N)高达103.3 mg/kg,是水稻-蚕豆模式的37.29倍.④流域坝区农田土壤养分具有空间变异性,海东地区土壤中w(TP)和w(olsen-P)较高,分别为1.23 g/kg和11.48 mg/kg,是凤仪地区的2.16和2.15倍;上关-邓川地区w(TN)较高,为4.28 g/kg,是海东地区的1.63倍;w(OM)空间差异不明显(P>0.05).研究显示,流域坝区土壤氮、磷流失总量分别为686、241 t,主要贡献来自农田.

     

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  • 收稿日期:  2016-03-04
  • 修回日期:  2016-04-28
  • 刊出日期:  2016-09-25

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