不同放牧制度下短花针茅荒漠草原植物种群作用和种间关系分析  

Analysis of the role of Stipa breviflora desert grassland plant populations and the interspecific relationships under different grazing systems

作　　者：希吉日塔娜[1] 吕世杰[1] 卫智军[1] 刘红梅[1,2] 孙士贤[1] 吴艳玲[3] 

机构地区：[1]内蒙古农业大学生态环境学院,内蒙古呼和浩特010019 [2]内蒙古林业科学研究院,内蒙古呼和浩特010010 [3]内蒙古师范大学生命科学与技术学院,内蒙古呼和浩特010022

出　　处：《生态环境学报》2013年第6期976-982,共7页Ecology and Environmental Sciences

基　　金：内蒙古科技创新引导奖励资金项目(20082002);"十二五"农村领域国家科技计划项目(2012BAD13B07)

摘　　要：以短花针茅荒漠草原植物种群为研究对象,采用2×2列联表法和灰色关联分析方法,探讨植物种群地位和作用及种间关系在不同放牧制度下的变化。结果表明,放牧会使建群种短花针茅(Stipa breviflora Griseb.)重要值增大,使碱韭(Alliumpolyrhizum Turcz.ex Regel)的重要值减小;轮牧有利于无芒隐子草(Cleistogenes songorica(Roshev.)Ohwi)在群落中的地位和作用增加,自由放牧则相反。植物群落种间关系正联结强度表现为禁牧区(CK)>划区轮牧区(RG)>自由放牧区(CG),负联结种对数的多少表现为CK<RG<CG,无联结种对数CK区和RG区表现基本一致,分别为53对和52对,CG区最少,为42对。种间关系在两物种间是不对等的,物种间相对亲和性会因放牧制度的改变而改变。对主要植物种群,自由放牧较划区轮牧更能削弱两物种间相互关联程度。物种间关联度在关联序排位上,划区轮牧较自由放牧更能保持种间关联序的相对稳定。The paper discusses the relationship between plant population status and role, and the kinds of changes in different grazing systems, which takes Stipa breviflora desert grassland plant populations as the object with the method of 2×2 the associated table method and gray relational analysis method, and the results are as follows. Decreases The important value of constructive species Stipa breviflora will increase and the Allium polyrhizum value decreases under grazing system; The importance of Mans Cleistogenes songorica communities will increase in rotational grazing system, and vice versa in free grazing system. The performance of positive association strength of the Plant community relations is CK〉 RG〉 CG, the negative association is CK 〈RG 〈CG, No links logarithmic are basically the same in the grazing area and rotational grazing area 53 pairs and 52 pairs respectively, and 42 pairs in free grazing area. Interspecific relationship between the two species is not equal, the affinity between species varies due to changes in grazing systems. Free grazing weakens the degree of association between two species of main plant populations compared to rotational grazing. The correlation coefficient between species is in the associated sequence, and the relative order of the sequence of interspecific association can be better maintained in rotational grazing compared with the free grazing system.

关 键 词：荒漠草原 种间联结 灰色关联 

分 类 号：Q948[生物学—植物学] S812[农业科学—草业科学]