【摘要】 １９９６年５～１０月对内蒙古中部乌兰察布高原南缘分布的短花针茅种群密度动态规律和生长进行的研究结果表明，生长期内在禁牧条件下短花针茅种群密度呈现出典型的Ｌｏｇｉｓｔｉｃ增长，而在放牧条件下呈现出典型的“Ｓ”型增长；短花针茅种群相对生长速率的大小与其生育节律是密切相关的；从各器官占整个植株的比例看，短花针茅在返青后的一个月内以茎基和茎的生长发育为主，以后则以叶的生长为主。更多还原

【Abstract】 The population dynamics and growth analysis of Stipa breviflora were studied on the S. breviflora arid steppe in 1996,5～10 in Damao Banner, Inner Mongolia. The results were: the dynamics of population density is a typical lagged “Logistic” curve during growing season on the ungrazing condition. Howeuer, It is a typical “S” Curve on the grazing condition. It also showed that the relationship is significante between the relative growth rate of the population and the rhythms of the growth and development of S. breviflora. The rapid growth of the stem-base and the stem of the plant ocured within a month after the turngreen, later changed to the growth of leaves.更多还原