Hou Fujiang, Li Guang, Chang Shenghua
College of Pastoral Agriculture Science and Technology, Lanzhou University.
Ying Yong Sheng Tai Xue Bao. 2002 Aug;13(8):1049-53.
Evaluation of the function and health of grazed grassland is an important aspect of grazing ecology. Based on analyzing the physiological response of grassland to grazing, a double-factor method of physiological threshold was developed. Physiological low limit (PLL), physiological ultimate limit (PUL), and duration ratio of regrowth to grazing stage (R/G ratio) were feasible to evaluate the sustainable management on the function and health of grazed grasslands. The reasonable threshold values of PLL, PUL and R/G ratio could play an important role on the complete recovery of the function and health of grassland after grazing, which was the goal of sustainable management of grassland ecosystems.
评估放牧草地的功能和健康状况是放牧生态学的一个重要方面。在分析草地对放牧的生理响应基础上，开发了一种生理阈值双因素法。生理下限（PLL）、生理极限（PUL）以及再生期与放牧期的持续时间比（R/G比）对于评估放牧草地功能和健康状况的可持续管理是可行的。PLL、PUL和R/G比的合理阈值对于放牧后草地功能和健康的完全恢复具有重要作用，这是草地生态系统可持续管理的目标。
