春季休牧对三江源区典型高寒草甸植物经济类群的影响

Effect of Rest Grazing in Spring on Different Economic Groups of Typical Alpine Meadow Plants in Three-river Source Region

为深入了解春季休牧对典型高寒草甸植物经济类群的影响,以果洛州退化高寒草甸为研究对象,进行连续三年的春季休牧,于2019年牧草生长旺季(8月中旬),采用样方法调查休牧区与对照区植物不同经济类群的特征,研究春季休牧对高寒草甸的影响。结果表明,随着春季休牧年限的增加,植物群落的高度、盖度和生物量均在增加,其中莎草科功能群生物量增加较快,其次为禾本科功能群,阔叶型可食草功能群增加缓慢,而杂类草功能群却逐渐减少。因此,春季休牧对于三江源区退化高寒草甸植被恢复具有重要意义。

To understand the effect of rest grazing in spring on typical alpine meadow plant economic groups,the degradation alpine meadow was as the research object for three consecutive years of spring rest grazing.The plants'characteristic of different economic groups was surveyed in spring rest grazing area and control area in 2019.The results showed that the height,coverage and biomass of the plant community increased with the increasing of the spring rest grazing years,among which the biomass of the functional group of Cyperaceae increased rapidly,followed by the functional group of Grasses,the functional group of broadleaved herbivorous species increased slowly,and the functional group of wild grasses decreased gradually.Therefore,spring rest grazing is of great significance to the vegetation restoration of degraded alpine meadow in the Three-river source region.