摘要
长期以来,由于人们对草地生态系统在自然和人为干扰活动影响下的结构与功能的变化规律不了解,在草地经营中片面强调提高草地载畜量,很少或没有与草地生态系统中的物质保持“等量交换”的原则,引起草地的退化,甚至整个草地生态系统的崩溃。
The plant biomass in mountainous grassland varies with the change of seasons: 1. The quantity of aboveground biomass is very lower in spring, grows rapidly in summer and autumn, and reduces in winter. Therefore, grazing would not begin too early in spring, or ceases too late in winter. 2. The quantities of underground biomass are larger than those of aboveground biomass in all seasons of the year. The total underground blomass varies in positive correlation with the change of biomass in 0—10cm soil layers. 3. The total blomass reduces during the rapid growth period of plant in summer and increases in autumn and winter. In the subtropical mountainous grassland ecosystem, the total biomass functions to supply forage for livestocks, to maintain the renewal of forage plants, to protect soil from erosion and to stabilize the grassland environments. Over-grazing must be avoided in the mountainous grasslands.
出处
《生态学杂志》
CAS
CSCD
北大核心
1989年第4期1-4,12,共5页
Chinese Journal of Ecology
关键词
植物
亚热带
草地
生物量
山地
phyto-biomass, seasonal dynamics, subtropical mountainous grassland, western Sichuan Basin.
