Abstract: The biomass of sown perennial ryegrass/white clover mixed pasture in a mountain region of subtropics was monitored in nine years. The results showed a biomass increase in the first three years until the peak in the third year. There was then a continued decline in total biomass. Thrjough out the nine years, the proportion of ryegrass biomass in the sward decreased while that of white clover inceased andthe grass/legume ratio decreased from 3:1 at initial estabishment to 0.47:1 after nine years.

Key words: Subtropics, Lolium perenne, Trifolium repens, Biomass dynamics

摘要： 本研究对亚热带中山地区多年生黑麦草与白三叶混播人工草地牧草生物量年动态进行监测。通过九年观测,研究结果表明,草地建植初期总生物量呈由低到高的变化趋势,峰值出现在第三年,以后随着生长发育年限的延续,生物量则由高到低逐年降低。草地群落中的多年生黑麦草生物量由高到低,而白三叶生物量则由低到高呈逐年上升的趋势。禾草与豆草的比例,由建植初期3:1下降到九年后的0.47:1。

关键词: 亚热带, 多年生黑麦草, 白三叶, 生物量动态