不同环境条件下几种高寒草甸植物的非克隆繁殖投入和生长  

Non - clone Reproductive Efforts and Growth Characteristics of Several Alpine Meadow Plants Under Different Environments

作　　者：易现峰[1] 

机构地区：[1]中国科学院西北高原生物研究所,青海西宁810001

出　　处：《四川草原》2003年第2期13-16,共4页Journal of Sichuan Grassland

基　　金：国家自然科学基金资助(No.39870121)项目

摘　　要：通过对高寒草甸生态系统金露梅灌丛、矮嵩草草甸、围栏矮嵩草草甸以及模拟地球增温效应下5种植物繁殖投入和生长特性的测定,结果表明,矮嵩草、麻花艽、苔草以及美丽风毛菊的叶长沿对照矮嵩草草甸、0TC、围栏以及金露梅灌丛呈现上升趋势,只是灌丛中苔草和麻花艽两种植物的叶长较围栏和OTC有所下降,而环境变化对植物的叶宽的影响较小。苔草在金露梅灌丛中的繁殖投入最大,其次是矮嵩草草甸和围栏,OTC中苔草的繁殖投入几乎为零。围栏与矮嵩草草甸内苔草的繁殖投入差异不显著,而两者中植物的繁殖投入与金露梅灌丛相比,差异性显著(P<0.05)。矮火绒草在矮嵩草草甸中的繁殖投入最大,其次是0Tc和围栏,灌丛中矮火绒草的繁殖投入最小。OTC与矮嵩草草甸内矮火绒草的繁殖投入差异不显著,而OTC与围栏中矮火绒草的繁殖投入差异性显著(P<0.05)。由此我们可以得出一个结论:繁殖投入随环境梯度的变化,反映了植物繁殖对策和繁殖投入在整个生活史特征中的可塑性。Reproductive efforts and growth characteristics of five plants grown at alpine meadow ecosystem were measured to test the effects of enclosure treatment and imitating global warming on plants. The result indicated that reproductive efforts of Leontopodium nanum are higher in Kobresia humilis meadow and OTC treatments. While non - clone reproductive efforts of Carex atro-fusca Schkuhr are higher in Kobresia humilis meadow, shrub community and enclosure treatments than in OTC. Lengths of leaves of the five plants are significantly affected by different environmental treatments, but there is no apparent difference in maximum breadth of leaves of the five plants under different environments.

关 键 词：高寒草甸植物 非克隆繁殖 生长特性 繁殖投入 环境梯度 生活史特征 

分 类 号：Q945.5[生物学—植物学]