Study on controlling grassland shrub and weeds by sheep night penning Ⅱ. Effects of sheep browsing and trampling on grassland vegetation and soil physical features
Effects of sheep browsing and trampling on soil physical features and plant, growth were studied with sheep and shrub Salix inamoena tetradenia. Results show that sheep eating and trampling damaged dramatically the aboveground of natural vegetation. The average pressure on soil by sheep was 55 kg per square meter. Soil bulk density in depth 10~20 cm increased with the increasing of soil density, soil water and air permeability in depth 0~20 cm, but soil bulk density in 0~10 cm depth increased fi...