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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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流动沙漠腹地灌木根际土壤微生物比较分析
DOI: 10.3724/SP.J.1145.2010.00759, PP. 759-764
Keywords: 沙漠公路防护林,土壤微生物,根际效应,土壤因子
Abstract:
分层采集塔里木沙漠公路3种防护林灌木梭梭、沙拐枣、红柳的根际土和非根际土，分析土壤微生物的根际效应及其与土壤环境因子间的关系.结果表明，3种防护林树种的根际土壤微生物均有比较明显的正效应，r/s值大小为梭梭>沙拐枣>柽柳；土壤微生物区系组成在不同树种根际土之间变化不大，其中细菌介于78.10%~93.18%，为优势类群，放线菌次之，真菌仅为0.03%~0.12%；与非根际土相比，根际土壤养分含量较高，盐分含量较低，为微生物营造了较好的土体条件.可见，沙漠腹地定植灌木对风沙土发育有较明显的促进作用，尤其是梭梭，建议实际林分配置中可适当提高梭梭的比例.表6参22
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