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### 草场植被影响高原鼠兔密度的探讨

1. 中国科学院西北高原生物研究所
• 出版日期:2011-11-23 发布日期:2011-11-22

### ON THE INFLUENCES OF RANGE LAND VEGETATION TO THE DENSITY OF PLATEAU PIKA(Ochotona curzoniae)

SHI Yinzhu

1. Northwest Plateau Institute of Biology, Academia Sinica
• Online:2011-11-23 Published:2011-11-22

Abstract: Plateau pika (Ochotona curzoniae) is one of the important pest rodents in the Qinghai-Xizang plateau. The grassland is destroyed wherever the pika population is in great number.This paper deals with the relations between the vegetation and the density of the pika in grassland according to the observations carried out in the alpine meadow of Men-Yuan, Qinghai, during August, 1980.The relation can be shown in the following binary linear regression equation. y = 101.34 - 0.8894x1 - 0.1811x2. y is the density of plateau pika, while x1 and x2 represent the cover-degree and height of the vegetation respectively.The result indicates that both the cover-degree and height of the vegetation influence the density of the plateau pika directly: the higher the cover degree and height of the vegetation, the lower density of the pika. The plateau pikas are difficult to be found in man-made grassland where the planted grasses are high.For control measure of the pika, it is important to improve the grassland.