松嫩平原天然羊草种群结实器官性状的波动与气候因子关系的研究

THE RELATIONSHIP BETWEEN THE NARIATIONS OF FRUIT-BEARING ORGANIC CHARACTERS IN NATURAL ANEUROLEPIDIUM CHINENSE POPULATION AND THE CLIMATIC FACTORS IN THE SONGNEN PLAIN OF CHINA

根据对松嫩平原3种不同利用方式和利用强度的羊草(Aneurolepidium chinense (Trin.)Kitag.)草甸连续8年的定位调查与测定,定量分析了羊草种群结实器官性状的波动与气候因子的关系。观察结果表明,气候是不同样地上羊草种群结实器官性状波动的综合作用因素之一。利用方式和利用强度的影响表现为样地之间各性状及其与不同时期气候因子的相关程度或函数关系上有所差异。羊草种群冬性枝条生长发育时期的气候因子对穗的各器官性状具有重要影响。气候因子普遍具有滞后的生态效应。

Based on eight years continuous observation and measurement on the ways and intensity of utilization of three fixed plots of the meadow of natural Aneurolepidium chinense in the Songnen Plain of China at definite stage of annual growth season the quantitative analysis on the relation- ship between the variations of fruit-bearing organic characters of A. chinense population and the climatic factors was investigated. Change of climate was one of the comprehensive factors which leaded to the variations of fruit-beáring organic characters of the population in different plots,bu variations on the characters of the population among the plots and on the degree of correlation or functional relationships between the character and the climatic factor in different stages were only caused by the ways and intensity utilization. The characters of the spike organ were more affected by climatic factors in the stage of growth and development of the winterness plants of the popula- tion. There were universal ecological effects of time lap in the climatic factors.