生物炭对土壤微生物C源代谢活性的影响

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Abstract

Field experiment was conducted to investigate the effect of biochar application on the functional diversity of microbial community in rhizosphere and bulk soils. The average well color development (AWCD) during microbial carbon metabolism, Richness index, Shannon-Wiener index, Evenness index, Simpson index of microorganisms in rhizosphere and bulk soils were analyzed by the biolog-ECO method under application of different amounts of biochar. Results showed that the metabolic activity of microbial carbon in rhizosphere soil was increased due to biochar application. When the biochar addition was equal or above 40t/hm², the metabolic activity of microbial carbon was increased significantly. Biochar application had no significant effect on the metabolic activity of microbial carbon in bulk soil. Meanwhile, the Richness index, Shannon-Wiener index, Evenness index of microbial communities in both rhizosphere and bulk soils were not significantly affected. Biochar application enhanced the ability of soil organisms in rhizosphere to utilize carbohydrates, amino acids and carboxylic acids as carbon sources, while it did not significantly influence the carbon utilization ability of soil organisms in bulk soil. Organic carbon was the main factor that controlled the metabolic activity of microbial carbon. Biochar addition of 40t/hm² was the most suitable application amount.

Key words： biochar rhizosphere and bulk soils biolog-ECO method principal component analysis redundancy analysis

Received: 04 May 2017

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	Articles by authors
	ZHOU Feng
	XU Chen-yang
	JIN Yong-liang
	FU Zi-teng
	YAN Heng-nian
	CHEN Wen-yi
	CHEN Si-mo
	GENG Zeng-chao

Cite this article:

ZHOU Feng,XU Chen-yang,JIN Yong-liang等. Effect of biochar on metabolic activity of soil microbial carbon[J]. CHINA ENVIRONMENTAL SCIENCECE, 2017, 37(11): 4202-4211.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2017/V37/I11/4202

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