放牧对冷蒿繁殖特性的影响

Influence of Grazing on the Reproduction Characteristic of Fringed Sagebrush Population in the Desert Steppe of Inner Mongolia

重度放牧对冷蒿(Artemisia frigida)的有性生殖具有严重的阻碍作用,严重影响其有性生殖;冷蒿生殖枝分化率、生殖枝花序数、种子产量、种子成熟度和发芽率之间在同一牧压下表现并不一致,在不同牧压下存在一定的平衡关系;放牧强度起调节作用是冷蒿对放牧的适应机制。

The sexual reproduction of fringed pressure, more particularly, heavy grazing sagebrush （Artemisia frigida） is curtailed by grazing conditions. However, fringed sagebrush reproduction characteristics change with different extents of grazing pressure. The differentiation proportion of reproductive tillers, inflorescence number per reproductive tiller, seed yields, and seed maturity degree of fringed sagebrush vary, even though the plants are under similar grazing pressure. Fringed sagebrush boasts an adaptive mechanism to adjust to the different extents of grazing pressure.