鼠类分布与“黑土滩”退化草地形成原因的研究

通过测定不同退化程度草地鼠类种群数量的变化,鼠类分布对草地的破坏程度,鼠类不同密度区植被地上生物量、地被覆盖度、植株高度,分析了草地植被群落的变化对鼠类数量的影响及鼠类种群密度与植被的关系。结果表明:随着草地退化程度的加重,鼠类的种群数量相应升高,重度退化草地中鼠类的种群密度降低。在鼠类分布影响下,植被地上生物量、地被覆盖度、植株高度均表现为不均匀分布。

Study on Relationship between Rodent Distribution and "Black Soil Type" Grassland Formation

This paper studied the changes of rodent population in different levels of degraded grasslands,rodent damage to grassland,aboveground biomass,plant height,vegetation coverage in different density area of rodent,and analysed the effects of changes of grassland vegetation community on rodent population,and the relationship between rodent population density and grassland vegetation.The results showed that with aggravation of grassland degradation,the population of rodents increased,but decreased in the heavily degraded grassland.And the distribution of aboveground biomass,plant height and vegetation coverage was non-uniform because of the effects of rodent distribution.