松嫩平原人工草地羊草和野大麦叶种群的趋同生长格局

Convergent growth patterns of leaf populations of Leymus chinensis and Hordeum brevisubulatum of cultivated pasture on the Songnen Plains of China

羊草和野大麦均为根茎型禾草,具有较强的营养繁殖力和相似的营养繁殖特性,是典型的无性系植物。在松嫩平原生长季末期,羊草和野大麦的无性系均由不同形成和生长时间的分蘖株组成,构成种群生活史中营养生长格局的连续统。根据植物种群的构件理论,采用大样本取样方法,对羊草和野大麦营养分蘖株进行了叶种群统计的生长分析。结果表明,羊草和野大麦营养分蘖株的叶种群均呈相同的幂函数变化规律,蕴涵着趋同的叶种群形成与生长过程;趋同的叶种群生物量生长格局;趋同的生长调节和物质分配策略;以及趋同的叶片生长过程。

Leymus chinensis and Hordeum brevisubulatum are rhizome grasses with vegetative propagation that is both vigorous and has similar characteristics. They are typical clonal plants. At the end of the growing season on the Songnen Plains of China, L.chinensis and H.brevisubulatum clones were both composed of tillers with different developing and growing times, forming a continuum for the two populations of their life history of vegetative growth pattern. According to plant population modular theory and using large sampling, a leaf population statistical growth analysis was carried out on the vegetative tillers of L.chinensis and H.brevisubulatum. The results showed that for both species, the leaf population of the vegetative tillers showed the same power function regulation of growth and change, including convergent development and growth processes, convergent biomass growth patterns, convergent growth modulation and biomass allocation strategies,and convergent leaf blade growth processes.