不同施肥处理对高寒草地地上生物量及植物群落特征的影响

试验以天祝高寒放牧草地植物为研究对象,进行了8种肥料(N,P,K,Zn,Cu,Mo,Se,B)的根部喷施试验,于7月和8月份测定不同处理草地植物群落特征。结果表明:除禾草类群外,各施肥处理对天祝高寒草地不同植物学类群地上生物量影响不显著(P0.05),氮肥提高了禾草类植物的生物量,但与对照差异不显著;施肥处理对赖草(Leymus secalinus)、早熟禾(Poa pratensis)的盖度以及赖草的密度有极显著影响(P0.01)。

Effect of different fertilization treatments on aboveground biomass and community characteristics of alpine meadow

In order to explore the effects of different fertilization treatments on plants in degraded alpine meadow,8 fertilizers (N,P,K,Zn,Cu,Mo Se,B) were sprayed on pasture and the characteristics of plant community in July and August 2013 were measured inTianzhu.The results showed that the differences of aboveground biomass among the different plant groups under different treatments were not significant (P>0.05) except grass group.The aboveground biomass of grass group under K fertilizer treatment was significantly lower than that under N,Cu fertilizer treatments and control (P<0.05).Compared with the control,N fertilizer increased aboveground biomass of grass apparently (P>0.05).There were no significant interactions between fertilization treatments,and the responses of different species to fertilization treatments varied.The fertilization treatments showed significant effects only on the coverage of Leymussecalinus,Poapratensis and the density of L.secalinus (P<0.01),and no significant effects on the coverage,density of other species and the height of all of species were found (P>0.05).