内蒙古锡林郭勒草地的草种组分与放牧压的关系研究

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Abstract

A study on the botanical composition, aboveground biomass and stand species diversity was carried out ingrasslands under different grazing intensities in the Xilin River basin in Inner Mongolia. The grassland near the village weremore intensively grazed than the stands away from the village. Lightly grazed stands were basically dominated by Leymuschinensis and Stipa grandis. By contrast,Cleistogenes squarrosa dominated the intensively grazed stand. The biomass variedfrom 303 g·m^-2 in lightly srazed stand to 127.3 g·m^-2 in intensively grazed stand. Stand species diversity indices were 3.13-3.64 irrespective of grazing pressure. The stand quality under varying pasture conditions was evaluated using a standquality index (SQI). The SQIs were 278 for an intensively grazed stand and 667 for a lightly grazed stand. which was located4km away from the village. Thirteen years of enclosure improved the SQI of the grassland from 420 to 624.

Key words： Biomass Floristic composition Grazing pressure Stand quality index(SQI)

Received: 25 February 2004

PACS:	Q143
	Q143+.4

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	Articles by authors
	YI Ru-han
	Ichiroku Hayashi
	Toru Nakamura
	Masas Shiyomi

Cite this article:

YI Ru-han,Ichiroku Hayashi,Toru Nakamura, et al. Relationship between the botanical composition and grazing intensities in Xilingoule grasslands, Inner Mongolia[J]. , 2004, 23(1): 12-15.

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http://journal15.magtechjournal.com/Jwk_stkx/EN/ OR http://journal15.magtechjournal.com/Jwk_stkx/EN/Y2004/V23/I1/12

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