CAJ | 학술논문

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(Stipagrandis)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(Carexkorshinskyi)为优势种的群落.单位样方内(1 m2)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.
통과료채양조사,대내몽고석림하류역적방목초지군락적조성성분,현존생물량,물충다양성등여방목강도적관계진행료연구.결과표명,거리정거점월원방목강도월약,출현료이양초(Leymus chinensis)화대침모(Stipagrandis)위우세충적군락.거리정거점월근방목강도월강,출현료이조은자초(Cleistogenes squarrosa)화촌태초(Carexkorshinskyi)위우세충적군락.단위양방내(1 m2)지상부적현존생물량재강방목압하적127.3 g화교약방목압하적303g지간변화.물충다양성적변화칙독립우방목강도차이,재3.13지3.64지간파동.위료판단방목초지적목초적생장상태,채용료생장상태질량지수(Stand quality index:SQI)래평개료실험양지군락적생장상태.재정거점적내부,SQI위278,이재리정거점4공리원적양지,지수칙변위667.금목13년적원퇴화양지적SQI치종420상승지624.
A study on the botanical composition,abovegroud biomass and stand species diversity was carried out in grasslands under different grazing intensities in the Xilin River basin in Ineer Mongolia.The grasslands near the village were more intensively grazed than the stands away from the village.Lightly grazed stands were basically dominated the intensively grazed stand.The biomass varied from 303 g-m-2 in lightly grazed 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 wuality under varying pasture coditions was evalusted using a stand quality index(SQI).The SQIs were 278 for an intensively grazed stand and 667 for a lightly grazed stand,which was located 4km away from the village.Thirteen years of enclosure improved the SQI of the grassland from 420 to 624.