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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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炼山及遮阳网覆盖对马尾松人工林土壤微生物生物量碳和氮的影响
DOI: 10.3724/SP.J.1145.2014.00261, PP. 261-267
Keywords: 炼山,遮阳网覆盖,马尾松人工林,土壤微生物生物量
Abstract:
以炼山和不炼山的马尾松人工林为研究对象，采用遮阳网地表覆盖的方法，在炼山和覆盖后第60天（d60）、d150和d300动态采集不同层次土壤样品，研究土壤微生物生物量碳和氮及其格局的动态过程.结果表明：炼山对覆盖后d60、d150和d300土壤微生物生物量氮的影响显著（p<0.05），分别降低了21%-63%、63%-108%、52%-97%.遮阳网覆盖可以明显增加炼山和不炼山环境下土壤微生物生物量碳和氮含量，但并不能完全改变炼山对土壤微生物生物量的负面效应.较之遮光率100%的遮阳网，遮光率85%的遮阳网覆盖更有效地促进了土壤微生物生物量的增加，可能更为有效地促进土壤微生物群落的恢复.同时，炼山和遮阳网覆盖均不能显著改变土壤微生物生物量碳氮比（p>0.05）.此外，炼山和覆盖后d60时3个土壤层次土壤微生物生物量并无显著差异（p>0.05），但d150和d300，15-30cm土壤微生物生物量显著低于其他两个土层（p<0.05），且以无遮阳网覆盖处理更为明显.
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