CAJ | 학술논문

为研究不同放牧方式群落结构、群落多样性、群落相似性系数,探讨不同放牧方式典型草原群落植物多样性的变化特点,给典型草原区的生态恢复建设和持续利用提供参考和理论依据.通过内蒙古东乌珠穆沁旗典型草原三种不同放牧方式的比较试验,结果表明,植物群落结构对比能看出,四季轮牧建群种克氏针茅重要值最大,定居放牧区一年生植物所占的比例明显增加.两年度内除均匀度指数外其他三个多样性指数都有所增加,两年度内均匀度指数存在下降的趋势,并且四季与两季轮牧植物优势度均低于定居.Shannon-wiener指数与Margalef指数、Simpson指数间呈正相关,相关系数分别达到0.891,0.899.这三个多样性指数与Pielou指数呈负相关.不同放牧方式群落相似性系数结果看出,两年内相似性系数均有所增加,但两季轮牧与定居间相似性系数为最大,四季轮牧与定居间相似性系数为最小.
위연구불동방목방식군락결구、군락다양성、군락상사성계수,탐토불동방목방식전형초원군락식물다양성적변화특점,급전형초원구적생태회복건설화지속이용제공삼고화이론의거.통과내몽고동오주목심기전형초원삼충불동방목방식적비교시험,결과표명,식물군락결구대비능간출,사계륜목건군충극씨침모중요치최대,정거방목구일년생식물소점적비례명현증가.량년도내제균균도지수외기타삼개다양성지수도유소증가,량년도내균균도지수존재하강적추세,병차사계여량계륜목식물우세도균저우정거.Shannon-wiener지수여Margalef지수、Simpson지수간정정상관,상관계수분별체도0.891,0.899.저삼개다양성지수여Pielou지수정부상관.불동방목방식군락상사성계수결과간출,량년내상사성계수균유소증가,단량계륜목여정거간상사성계수위최대,사계륜목여정거간상사성계수위최소.
The experiments of comparing four season rotational grazing, two season rotational grazing and continuous grazing were conducted on typical steppe in East Wuzhumuqin count of Inner Mongolia. Study the communities structure and diversity of different grazing in typical steppe. We mainly discuss characteristics of plant diversity under different grazing. It provide reference and theoretical basis for ecological restoration and sustainable use. The results showed as fol-low: the Stipa krylovii important value of four season rotational grazing was the largest, settled grazing annuals was in-creased . In the two-year except for the evenness index other indexes had increased, plants simpson of four and two season rotational grazing was lower than the settlement.Shannon-wiener and Margalef correlation coefficient was 0.891 .Shannon-wiener and Simpson index correlation coefficient was 0.899. Three diversity index and Pielou index were a negative corre-lation. The Morisita-Horn similarity coefficient in the two year were increased,The Morisita-Hom similarity coefficient in TG and SG were the highest.The Morisita-Hom similarity coefficient in FG and SG were the lowest.