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OALib Journal期刊
ISSN: 2333-9721
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湘中丘陵区不同经营类型毛竹林土壤微生物量碳动态
DOI: 10.3969/j.issn.1000-2006.2013.05.009, PP. 45-48
Keywords: 毛竹,土壤微生物量碳,垂直分布,季节动态,湘中丘陵区
Abstract:
对湘中丘陵区毛竹笋用林（ⅰ）、笋材兼用林（ⅱ）、材用林（ⅲ）等不同经营类型林分土壤微生物量碳（smbc）含量、储量的垂直分布、季节动态及与土壤温度、湿度的关系进行了研究。结果表明：笋用林、笋材兼用林和材用林土壤平均smbc含量分别为18.92～118.42、21.19～133.66和19.56～119.46mg/kg，储量为0.12～0.74、0.14～0.91和0.11～0.70t/hm2；在垂直分布上，不同类型毛竹林碳含量、碳储量随土壤深度增加而下降，0～20cm土层是smbc的主要分布区；在季节动态上，不同类型毛竹林碳含量、碳储量均以7月最高，1月最低；在一定范围内，土壤温度上升、湿度增加有利于促进smbc含量、储量增加，smbc与土壤温度的相关性达极显著水平；土壤温度对smbc的影响符合幂指数模型，湿度与smbc的回归关系为非线性。
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