关键词: 混牧林, 牧草层植物群落, 生物现存量, 土壤物理, 标准牛单位

Abstract:

More than 90 percent of pasture species are the perennial plants and have very stable niche in the forest of Liaoning east mountainous area.The productive capacity and species diversity,etc.are controlled by upper canopy and in a dynamic change.The best light range for higher output and quality of pasture is the crown density in 0.5 to 0.8.In the condition of three years continuos grazing of cattle unit per 3.9 hectares,the stand volume increment was not decreased and the direct economic benefits is much higher than that before grazing.The quantity that animal grazing must be controlled less than 50 percent of pasture productive capacity.The forestland over 30-degree gradient must be forbidden to graze.

Key words: Grazing in the forest, Phytocoenose of pasture class, Existing biomass, Soil physical properties, Cattle unit