生物量则是衡量草原生产力大小的标准之一，代表了生态系统利用物质和能量的能力。
Biomass is one of the criteria on measuring productivity of grassland, which represents the capacity of ecosystem on utilizing materials and energy.
当家畜的放牧时间和载畜率类似于草原生态系统进展下的模式时，草地可保持它的生产力和植被组成。
It is concluded that range ecosystems may sustain their productivity and composition when grazing time and stocking rate resemble the grazing pattern representing the ecosystem progressing.
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