放牧及刈割强度对鸭茅密度及能量积累的影响

Q142; The population density, caloric value and energy accumulation of Dactylis. Glorneratawere significantly increased after moderate grazing. Tuft size was decreased, while the tuft density was significantly increased due to the high grazing in tensity which showed the different reproductive strategies on the sites with various grazing intensities. Both inadequate grazing and over-grazing lowered the density and energy accumulation of D. Glomerata. 65 % rate of consumption of the grasses, or 4 times of mowing in 1 year contributed to the rapid growth of D. Glomerata and the sustainable devel opment of the grassland.