川西高原季节性雪被覆盖下凋落物输入对土壤微生物数量及生物量的影响

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Abstract

To understand the effects of snow-cover and organic carbon input on the alpine soil ecosystem processes, intact soil core incubations in three different snow regimes (0, 30 and 100 cm depth) and litter input (0, 5 and 20g Sibiraea angustata leaf litter) were used to measure the microbial count and biomass in the eastern Tibetan Plateau from January to May 2010. The result showed that snow-cover could effectively isolate atmosphere and soil, reduce the amplitude and frequency of frozen-thawing events, and increase significantly bacteria and fungi count, while did not influence microbial biomass carbon and nitrogen. Litter input increased microbial count, while decreased microbial nitrogen content. The results indicated that snow-cover and organic carbon input impact directly soil microbial community in winter, and then affect the ecosystem processes in alpine zone.

Key words： snowpack litter input bacteria count fungi count microbial biomass carbon and nitrogen

Received: 25 June 2013

S154.38

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	Articles by authors
	HU Xia
	WU Ning
	YIN Peng
	WU Yan

Cite this article:

HU Xia,WU Ning,YIN Peng, et al. Effects of snowpack and litter input on soil microbial count and biomass in the Eastern Tibetan Plateau[J]. , 2013, 32(3): 359-364.

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http://www.ecolsci.com/EN/ OR http://www.ecolsci.com/EN/Y2013/V32/I3/359

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