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草业科学  2014 

冬季火烧对川西亚高山草甸土壤理化性质的影响

DOI: 10.11829\j.issn.1001-0629.2013-0354, PP. 811-817

Keywords: 冬季火烧,亚高山草地,土壤理化性质,青藏高原

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Abstract:

?为探究冬季火烧对草地土壤理化性质的影响,以2010年12月5日发生火灾的川西地区亚高山草地为研究对象,对比火烧与未火烧草地表层0-20cm土层土壤理化性质的差异,发现冬季火烧并不足以改变土壤含水量、容重和孔隙度,却在一定程度上改善了土壤的通气性,并显著提高了0-5cm土层土壤的有机质、全氮、有效磷和速效钾的含量(P<0.05),但未改变土壤的可溶性碳、氮含量。总的来说,冬季火烧改善了翌年草地植物生长的土壤环境,不仅为根系生长提供了更大的扩展空间,还为植物生长提供了更多的养分资源。

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