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生物碳对加入外源肉桂酸土壤酶活性、微生物结构及土壤养分的影响

DOI: 10.3969/j.issn.1000-7091.2013.03.038, PP. 210-216

Keywords: 生物碳,肉桂酸,土壤酶,土壤微生物,土壤有效养分

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Abstract:

通过室内培养法,研究了不同比例生物碳对含有肉桂酸土壤的微生物数量、土壤酶活性及土壤有效养分含量的影响。结果表明:肉桂酸对所测4种土壤酶活性均产生了不同程度的影响,其中影响最大的是蛋白酶;细菌的数量呈增加趋势,而真菌的数量呈减少趋势;加剧了土壤中硝态氮含量的积累,降低了土壤铵态氮、有效氮、有效磷和速效钾的含量。添加2.5%和5%碳化玉米芯后促进了土壤酶的活性;增加了土壤中细菌的数量,减少了真菌的数量,B/F值增加;有效地缓解肉桂酸对土壤有效养分的影响。说明生物碳可以吸收土壤中的化感物质,从而缓解化感物质的毒害作用。

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