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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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煤矸石山不同植被恢复模式对土壤养分的影响——以山西省河东矿区1号煤矸石山为例
DOI: 10.11821/xb201303008, PP. 372-379
Keywords: 煤矸石山,土壤养分,植被恢复,RDA
Abstract:
对2009-2011年山西省河东矿区不同植被恢复模式下土壤养分进行了检测分析,并对其环境影响因子进行了研究.结果显示(1)随着矸石山植被恢复年限的增加,煤矸石山地温显著降低,植物多样性增加,盖度和生物量不同程度提高.(2)经过3年植被恢复的矸石山土壤速效磷和速效钾的改良效果达到全国土壤普查3级水平;恢复土壤碱解氮和有机质含量为11.94mg·kg-1和7.69g·kg-1,改良效果不显著.紫穗槐模式对土壤速效磷的改良效果较好;紫穗槐—高羊茅—紫花苜蓿模式有利于碱解氮的积累;高羊茅—紫花苜蓿模式对速效钾和有机质的改良效果最佳.(3)矸石山坡度和地温与土壤养分呈显著负相关;紫花苜蓿盖度与碱解氮、速效钾和有机质含量呈显著正相关;植被平均生物量和高羊茅盖度的提高有助于土壤养分的改良效果.煤矸石山植被恢复宜采取以草开路,在生态环境条件有所改善基础上,走草、灌、乔相结合的构建模式.
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