滇西北高原纳帕海湿地湖滨带优势植物凋落物分解特征研究

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Abstract

Lakeside dominant plants, Zizania caducifolia, Scirpus tabernaemontani and Heleocharis liouana, in Napahai plateau wetland in northwest Yunnan were chosen as research objectives. The decomposition dynamics was studied by litterbag method, and initial chemical components of litters were also analyzed. The results showed that the retention rate of the three litters was reduced with decrease of time, while the retention rate was not correlated with time. The retention rate of Scirpus tabernaemontani (70.5%) was obviously higher than that of Zizania caducifolia (56%) and Heleocharis liouana (52.5%)(P<0.05), while the latter two had no significant difference in retention rate. The decomposition rates differed in each community litter. Heleocharis liouana had the fastest decomposition rate, followed by Zizania caducifolia and then Scirpus tabernaemontani, with k, the average decomposition ration constant, 0.067, 0.062 and 0.039 respectively. The three litters had different decomposition rates in different periods, and the decomposition was closely related to temperature, which was increased with increase of temperature, showing a linear increase. In addition, the three litters were significantly different in C, N components, while there was no evidence showing that the decomposition rate was closely related to the initial C, N and C/N.

Key words： Napahai wetland lakeside dominant plant litter decomposition characteristics

Received: 25 April 2013

Q948.11

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	Articles by authors
	GUO Xu-hu
	TIAN Kun
	XIAO De-rong
	DONG Yu
	LIU Ling-cong

Cite this article:

GUO Xu-hu,TIAN Kun,XIAO De-rong, et al. A study on lakeside dominant plants litter decomposition characteristics in Napahai plateau wetland in northwest Yunnan[J]. , 2013, 32(2): 200-205.

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http://www.ecolsci.com/EN/ OR http://www.ecolsci.com/EN/Y2013/V32/I2/200

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