摘要
采用对比分析的方法调查了内蒙古锡林郭勒盟中国科学院草原生态系统定位站大针茅草原植物群落在不同放牧梯度下的群落变化,结果表明:随着放牧梯度的增加,群落中的优势种大针茅和羊草等优良牧草的营养枝高度、株丛密度及生物量均明显降低并逐渐被猪毛菜、糙隐子草和冷蒿等耐牧植物所取代,生产力及利用价值下降。从无放牧的对照样地到重度退化样地植物群落类型依次转变为:羊草+大针茅+丛生禾草、大针茅+羊草+糙隐子草+丛生禾草、糙隐子草+大针茅+羊草+丛生禾草、猪毛菜+糙隐子草+小丛生禾草。
Variation of plant population on different grazing gradients, that is, no grazing (CK),light grazing (LG), moderate grazing (MG) and heavy grazing (HG), were studied on Stipa grandis steppe in the Grassland Ecosystem Station of Chinese Academy of Science in Xilmguole League. The results showed that with the increase of grazing intensity, the annual (Salsola collina, Cleistogenes squarrosa, Artemisia frigida) replaced the perennial grasses, such as Stipa grandis, Leymus chinensis, the height of vegetative tiller, density of tussock and biomass trend to decrease and the usage value of grassland was reduced. The type of plant community from CK to HG was Leymus chmensis+ Stipa grandis+grow thickly herb, Stipa grandis+ Leymus chinensis+ Cleistogenes squarrosa+ grow thickly herb, Cieistogenes squarrosa+ Stipa grandis+ Leymus chinensis + grow thickly herb, Salsola collina+ Cleistogenes squarrosa+ smaller grow thickly herb respectively.
出处
《内蒙古农业大学学报（自然科学版）》
CAS
2004年第4期34-37,共4页
Journal of Inner Mongolia Agricultural University(Natural Science Edition)
基金
国家自然科学基金重点项目(30360022)
教育部高等学校青年教学科研奖励计划
内蒙古科学技术攻关资助项目
