通过了采样调查,对内蒙古锡林河流域的放牧草地群落的组成成分,现存生物量,物种多样性等与放牧强度的关系进行了研究。结果表明,距离定居点越远放牧强度越弱,出现了以羊草(Leymus chinensis)和大针茅(Stipa grandis)为优势种的群落。距离定居点越近放牧强度越强,出现了以糙隐子草(Cleistogenes squarrosa)和寸苔草(Carex korshinskyi)为优势种的群落。单位样方内(1m2)地上部的现存生物量在强放牧压下的 127.3 g和较弱放牧压下的 303g之间变化。物种多样性的变化则独立于放牧强度差异,在3.13至3.64之间波动。为了判断放牧草地的牧草的生长状态,采用了生长状态质量指数(Stand quality index:SQI)来评价了实验样地群落的生长状态。在定居点的内部,SQI为278,而在离定居点4公里远的样地,指数则变为667。禁牧13年的原退化样地的SQI值从420上升至624。
A study on the botanical composition, aboveground biomass and stand species diversity was carried out ingrasslands under different grazing intensities in the Xilin River basin in Inner Mongolia. The grassland near the village weremore intensively grazed than the stands away from the village. Lightly grazed stands were basically dominated by Leymuschinensis and Stipa grandis. By contrast,Cleistogenes squarrosa dominated the intensively grazed stand. The biomass variedfrom 303 g·m-2 in lightly srazed stand to 127.3 g·m-2 in intensively grazed stand. Stand species diversity indices were 3.13-3.64 irrespective of grazing pressure. The stand quality under varying pasture conditions was evaluated using a standquality index (SQI). The SQIs were 278 for an intensively grazed stand and 667 for a lightly grazed stand. which was located4km away from the village. Thirteen years of enclosure improved the SQI of the grassland from 420 to 624.
全 文 ： 万方数据
万方数据
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内蒙古锡林郭勒草地的草种组分与放牧压的关系研究
作者： 亦如瀚， 林一六， 中村辙， 盐见正卫
作者单位： 亦如瀚(暨南大学理工学院环境工程学系,广州,510632)， 林一六(筑波大学菅平高原研究中
心,长野,1278-294,日本)， 中村辙(筑波大学农林研究所,筑波市,305-8572,日本)， 盐见
正卫(茨城大学理学部,水户市,310-0851,日本)
刊名： 生态科学
英文刊名： ECOLOGIC SCIENCE
年，卷(期)： 2004,23(1)
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