封育条件下云南马龙县山地草甸主要植物繁殖对策研究

Study on reproductive strategies of the dominant plants in the upland meadow under fencing in Malong Region of Yunnan Province

分别对云南马龙县轻度退化,中度退化和重度退化的山地草甸进行围栏封育,以自然状态作对照,观察分析了封育条件下8个主要植物种群繁殖器官特征变化及其在不同退化梯度的差异显著性。结果表明,封育导致白茅根茎节间距缩短,枝条密度增加,出现营养繁殖向有性繁殖转变;白健秆、西南委陵菜、鼠尾栗、旱稗、画眉草、蜈蚣草和四脉金茅的丛幅增大,促进了其生殖生长。

We enclose the light,the moderate and the heavy degradated upland meadow separately in Yunnan Malong.Compared with the nature sites,Features of the vegetative reproductive organs of the 8 species in the different degraded meadow,with Duncan's SSR for analysis of their significant difference between sites that under fencing,The results showed that fencing could stimulate Imperata cylindrica to produce more shoots and shorten internodes on their rhizomes,and change the way of reproduction from vegetative reproduction to sexual reproduction.It could also increase canopy size in Eremochloa ciliaris,Eragrostis pilosa,Sporobolus fertilis,Echinochloa hispidula,Potentilla fulgens,Eulalia pallens and Eulalia quadrinervis,and could stimulate the plants sexual reproductio to some extent.