Response Mechanism of Sheepgrass ( Leymus chinensis ) to Mowing

Studies on sheepgrass mowing mainly focus on the natural mowing grassland, included regenerative growth of the leaves and tillers and compensatory growth after mowing, compensatory photosynthesis after mowing, nitrogen balance between income and expenditure, and the change in phosphorus and potassium, the impact of mowing stage and mowing frequency on plant community composition, community productivity, soil water regime and soil hardness, and other physical properties and fertilization effects in mowing grassland. Aboveground biomass of sheepgrass had large decline after defoliation, and proportion of the sexual and asexual reproduction of sheepgrass changed with defoliation significantly reduced the differentiating rate of reproduction plant. Furthermore, there was a significant increase in chlorophyll concentration and capacity to evolve O2 in the regrowing leaves associated with the defoliation.