草业科学2011，Vol.28Issue(8)：1507-1511,5.
新源县山地草原植被特征及植物营养对放牧强度的响应
Influence of stocking rates on vegetation characteristics and plant nutrient contents in mountain grassland at Xinyuan County
摘要
Abstract
According to local typical grazing patterns and sheep units per hectare, the stocking rates in mountain grasslands at Xinyuan County was divided into extremely heavy （E, 0.51 sheep unit/ha）, heavy （H, 0.43 sheep unit/ha）, moderate （M, 0.32 sheep unit/ha）, light （L. 0.26 sheep unit/ha） and no graz- ing area （U, 0 sheep unit/ha）. The study evaluated effects of above five stocking rates on vegetation characteristics and plant nutrient contents in mountain grasslands with Bothriochloa ischcemum and other forbs. The results showed that the highest yield of forages （1 008 g/m2） was obtained in 1＇t of June. With increasing grazing intensity, biotope was deteriorated; species diversity was decreased and productivity was reduced. CP content of the forages was the highest （10.6%）, but the NDF （50%） was the lowest with extremely heavy grazing treatment; ADF （30.8%） contents with moderate grazing was the lowest among in all of treatments.关键词
产量/草地植物营养/放牧强度/山地草原Key words
yield/plant nutrition/grazing intensity/mountain grassland分类
农业科技引用本文复制引用
闫凯,张仁平,李德祥,锡文林,张建立..新源县山地草原植被特征及植物营养对放牧强度的响应[J].草业科学,2011,28(8):1507-1511,5.基金项目
全球环璃基金（GEF）新疆草地项目 （）
