Studies on the Grassland Development in the Forest Ⅷ. Effect of shading degrees on the quality, digestibility and nitrate nitrogen concentration of main grasses
A field experiment was conduted to determine the effects of shading degrees (O: full sunlight, 25, 50 and 75%) on the proximate components, cell wall constituents (CWC), digestibility, water soluble carbohydrates (WSC) and nitrate nitrogen (NO3-N) conc