Wang R
National Laboratory of Grassland Ecological Engineering, Northeast Normal University, Changchun 130024.
Ying Yong Sheng Tai Xue Bao. 2000 Jun;11(3):399-402.
The experiment on the effect of grazing on the asexual and sexual reproduction and biomass allocation in Leymus chinensis population was conducted in Songnen grassland. The results show that animal grazing reduced both asexual and sexual reproductive channels. With the increase of grazing intensity, the densities of asexual shoots and rhizome tillers, seed biomass, numbers of seeds per inflorescence and sexual shoot ratio decreased significantly, especially after heavy grazing. The rates of biomass allocation to rhizome increased significantly with increasing grazing intensity, while the rates of biomass allocation to assimilation, unassimilation organs and seed production decreased remarkably. In the haviest grazing stage, there were almost no sexual shoots.
在松嫩草地开展了放牧对羊草种群无性繁殖、有性繁殖及生物量分配影响的实验。结果表明，动物放牧使无性繁殖和有性繁殖途径均减少。随着放牧强度增加，无性蘖和根茎分蘖密度、种子生物量、每花序种子数及有性蘖比例显著降低，重度放牧后尤为明显。随着放牧强度增加，根茎生物量分配率显著增加，而同化器官、非同化器官及种子生产的生物量分配率显著降低。在最重度放牧阶段，几乎没有有性蘖。
