摘要
对不同放牧强度下高寒草甸草本植物不同种群的优势度变化进行了试验观察。结果表明,放牧强度不同,优势度值大的植物种类也不同,且在不同处理之间和年际之间发生变化。随着放牧强度的降低,禾本科等优良牧草在优势度较大的植物种类中所占的比例逐渐增加;同种植物的优势度也随着放牧强度的加重或减轻而发生改变。
This paper studied the dynamic change on preponderance degree of population for different stocking intensity in Alipine Meadow.The results showed that the species and preponderance degree are change in the different dealing and between years when stocking intensity is change.When stocking intensity reduce the rate of excellent grazing increase by degrees.The preponderance degree of same kind of plant is also change with the increasing or reduces of stocking intensity.
出处
《青海大学学报（自然科学版）》
2003年第6期4-6,共3页
Journal of Qinghai University(Natural Science)
关键词
放牧强度
高寒草甸
种群
优势度
stocking intensity
Alpine Meadow
population
preponderance degree
