湖南西南部高山牧场不同环境对沼泽田鼠密度影响的探讨

A Preliminary Study of the Aline Meadow Environments Effect on the Density of Reed Vole in West-south of Hunan

本文就高山牧场不同环境沼泽田鼠密度影响进行了初步探讨。结果表明:人工牧场原生植物越多,鼠密发越廊(r=0.885 P<0.01);牧场植物越高,鼠密度也越高(r=0.829 P<0.01);结构疏松土壤鼠密度亦高,如沙质土与粘质土或翻耕地与未垦地比较,鼠密度均以前者较高;梯耕地鼠密度显著高于全耕地(t=7.192 P<0.01)。作者认为,上述结果与沼泽田鼠生物学特性有关,即:高株牧草地适合其隐蔽和营巢,疏松土壤便于其掘洞和取食,梯耕地垂直面为其创造了营洞环境。据此,提出了合理开发利用草山和种植矮株良种牧草的建议。

The investigation about effects on the alpine meadow environments whioh was brought by the density of reed vole (Microtas fortis) was carried out in the alpine meadow of Nan San, during Auguest 1989.The results showed that there was relative between the number of original vegetation and the rodent density in man-made grass-hill, the height of the vegetation had a relation to the rodent density and the higher density of the rodent was found in the loose soil of the grass hill.The author thought that the results were caused by the characteristics of nesting environment perference and activing habits of reed vole. In order to prevented and cotrolled reed vole, it is important to improve the grasshill.