禾本科草坪草种间竞争研究  

Studies on the Interspecific Competition of Poaceae Turfgrass

作　　者：王微[1] 

机构地区：[1]重庆文理学院生命科学与技术学院,重庆永川402160

出　　处：《湖北农业科学》2011年第8期1624-1627,共4页Hubei Agricultural Sciences

基　　金：重庆市教育委员会科学技术研究项目(KJ081212)

摘　　要：在盆栽条件下,采用添加系列试验法对禾本科的结缕草(Zoysia japonica Steud.)、狗牙根[Cynodondactylon(L.)Pers.]和多年生黑麦草(Lolium perenne L.)的种间关系进行研究,运用De Wit的相对总生物量(Relative yield total,RYT)和相对竞争系数(Relative competitive coefficient,RCC)模型评价3种草的种间竞争力。结果表明,结缕草、狗牙根和多年生黑麦草各占有不同的生态位,对同种资源的利用表现出一定程度的共生和竞争关系,它们之间竞争能力大小表现为多年生黑麦草>狗牙根>结缕草。而3种草各自单独播种时,结缕草在添加系列密度上为16、狗牙根为32时,生长较好;密度增大,种内竞争加剧;当草种两两组合混播时,结缕草和狗牙根在生长期间一定密度范围内有利于各自生长;而多年生黑麦草对结缕草和狗牙根的生长均产生抑制作用。Additive design was used in a pot experiment to determine the interspecific competition relationship among three Poaceae species,Zoysia japonica Steud.,Cynodon dactylon（L.）Pers.and Lolium perenne L.,and De Wit＇s relative yield total（RYT） and relative competitive coefficient（RCC） model were used to evaluate the competitive strength between them.The results indicated that Z.japonica,C.dactylon and L.perenne had different ecological niches;and the relationship between them was symbiosis and competition in some degree when they share the same resource.The order of competitive ability among them was L.perenne C.dactylon Z.japonica.When they were sown respectively,the dry matter per plant of Z.japonica and C.dactylon was the maximal with the neighbor density of 16 and 32;and the interspecific competition increased gradually as the density increased.Under the different mix-sowing combination of two species,the lower neighbor density were beneficial to mutual growth of Z.japonica and C.dactylon,but L.perenne restrained the growth of the other two species.

关 键 词：禾本科 草坪草 种间竞争 密度 相对竞争系数 

分 类 号：S688.4[农业科学—观赏园艺] Q948.122.1[农业科学—园艺学]