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松嫩平原贝加尔针茅无性系构件的结构及生长规律
引用本文:杨允菲,张宝田.松嫩平原贝加尔针茅无性系构件的结构及生长规律[J].应用生态学报,2005,16(12):2311-2315.
作者姓名:杨允菲  张宝田
作者单位:东北师范大学草地科学研究所,植被生态科学教育部重点实验室,长春,130024
基金项目:国家自然科学基金资助项目(30470272,30270260).
摘    要:采用整个分蘖丛挖掘的取样方法,对松嫩平原栽培条件下贝加尔针茅无性系构件的结构,以及生长与生产规律进行了定量分析.结果表明,在9月末停止生长期,经过2个生长的营养繁殖,贝加尔针茅无性系的丛径为9.4±3.24 cm.无性系的全体构件数为161.5±85.2个.其中,生殖分蘖株为146±1148个,占9.25%;营养分蘖株为146.9±78.70个,占90.75%.全体构件总生物量为53.8±34.22 g,其中生殖分蘖株生物量为25.0±20.34 g,占43.75%;营养分蘖株为28.8±19.43 g,占56.25%.随着丛径的增加,不同构件的数量均具有线性同速生长规律,而不同构件的生物量均具有幂函数异速增长规律.不同构件生物量与无性系全体构件的数量和生物量之间均呈显著(P<0.05)或极显著(P<0.01)的幂函数正相关关系.平均单个生殖分蘖株的生产力约为营养分蘖株的10倍.生殖分蘖株的数量和生物量的表型可塑性普遍大于营养分蘖株.

关 键 词:贝加尔针茅  分蘖株  构件结构  无性系生长
文章编号:1001-9332(2005)12-2311-05
收稿时间:2004-12-28
修稿时间:2005-07-25

Module structure and growth pattern of Stipa baicalansis clone in Songnen Plain of China
YANG Yunfei,ZHANG Baotian.Module structure and growth pattern of Stipa baicalansis clone in Songnen Plain of China[J].Chinese Journal of Applied Ecology,2005,16(12):2311-2315.
Authors:YANG Yunfei  ZHANG Baotian
Institution:Key Laboratory for Vegetation Ecology, Ministry of Education, Institute of Grassland Science, Northeast Nornmal University, Changchun 130024, China. yangyf@nenu.edu.cn
Abstract:By the method of digging up whole tiller tuft, this paper quantitatively analyzed the module structure and growth pattern of Stipa baicalansis clone under the cultural conditions in the Songnen Plain of Northeast China. The results showed that after two growth seasons of vegetative reproduction, the tuft size of the clone in its growth stopping period at the end of September was 9.4 +/- 3.24 cm, and the total number of the clonal modules was 161.5 +/- 85.2, among which, the individuals of reproductive and vegetative tillers were 14.6 +/- 11.48 and 146.9 +/- 78.70, occupying 9.25% and 90.75% of the total, respectively. The total biomass of the clonal modules was 53.8 +/- 34.22 g, and the biomass of reproductive and vegetative tillers was 25.0 +/- 20.34 g and 28.8 +/- 19.43 g, occupying 43.75% and 56.25% of the total, respectively. With the increase of tuft size, the number of different modules was in a linear isogony growth, while their biomass was in an power allometry growth. There was a significant (P < 0.05) or very significant (P < 0.01) power positive correlation between the biomass of different modules and the number and total biomass of clonal modules. The mean productivity of unit reproductive tiller was about ten times higher than that of unit vegetative tiller, and the phenotype plasticity of the number and biomass of reproductive tiller was larger than that of vegetative tiller.
Keywords:Stipa baicalansis  Tiller  Module structure  Clonal growth  
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