大青山4种根茎禾草种群生物量生殖分配研究  

Study on Biomass Reproductive Allocation in Four Kinds of Rhizomatous Grass Populations in Daqingshan Mountain

作　　者：高强[1] 国振杰[1] 王普昶[1] 易津[1] 

机构地区：[1]内蒙古农业大学农学院牧草生理生态实验室,呼和浩特010019

出　　处：《中国农学通报》2008年第5期22-25,共4页Chinese Agricultural Science Bulletin

基　　金：国家自然科学基金项目(30260010)资助

摘　　要：从构件入手,研究了内蒙古大青山地区4种根茎禾草:羊草(Leymus chinesis)、赖草(Leymus secali-nus)、米氏冰草(Agropyron michnoi)和无芒雀麦(Bromus inermis)种群根茎、营养枝和生殖枝及其构件结实期生物量的生殖分配,研究表明:4种不同根茎类型的根茎禾草种群生物量生殖分配表现出一定的规律性:各种群用于根茎和营养生长的生物量生殖分配占有绝对的优势,生殖分配比例很高,而用于有性生殖生长的生物量生殖分配均较小,大约在16%以下;在各种群主要构件的生物量生殖分配中,根茎和营养枝叶片占有较大比例(20%￣40%),而用于有性繁殖体种子生产的比例都很小,基本在2%以下。The biomass reproductive allocations among the rhizomes, vegetative shoots, reproductive shoots and population modulus of Leymus chinesis, Leymus secalinus, Agropyron michnoi, Bromus inermis in Daqingshan mountain in inner mongolia were studied by using modulus analysis. The results showed that biomass reproductive allocations in four different kinds of Rhizomatous grass populations were similar in fruit phase： the allocation rates of the biomass in each Rhizomatous grass for its rhizome and vegetative growth were much higher, and that for sexual growth were less than 16%. The ratio of biomass of rhizomes and vegetative shoots were as much as 20%-40% of the total, while that of seed were less than 2%.

关 键 词：大青山 根茎禾草 种群 生物量 构件 生殖分配 

分 类 号：S812.8[农业科学—草业科学]