Intra-specific variations of two Leymus chinensis divergence populations in Songnen Plain, Northeast China
Intra-specific variations of two Leymus chinensis divergence populations in Songnen Plain, Northeast China作者机构：Laboratory of Quantitative Vegetation Ecology Institute of Botany Chinese Academy of Sciences Beijing 100093 China
出 版 物：《Journal of Environmental Sciences》 (环境科学学报（英文版）)
年 卷 期：2002年第14卷第1期
页 面：20-26页
核心收录：
学科分类：07[理学] 09[农学] 0903[农学-农业资源与环境] 0713[理学-生态学]
主 题：population demography seed productions biomass allocation net photosynthetic rate transpiration rate Leymus chinensis populations Songnen Plain
摘 要：Population demography, seed production, biomass allocation, net photosynthesis and transpiration of two Leymus chinensis divergent populations and between two years in Songnen plain, northeast China were compared. Strong differences between the dry 1997 and moist 1998 occurred in vegetative shoot and sexual shoot densities, sexual differentiation and tiller densities, as well as in the lengths of inflorescence, seed numbers per inflorescence, seed weights and biomass allocation in each population respectively ( P 0.05). Excepting the transpiration rate in the early June, the differences between the two populations in net photosynthesis and transpiration rate of vegetative shoots and sexual shoots were strongly significant in the early June and July respectively ( P 0.01). Relative stable variations in population demography and physiological traits between the two populations indicated that they are divergently in the Songnen Plain.
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