【摘要】 长期观测水葫芦的生长情况,以探明水葫芦的生物学特征。结果表明,水葫芦在适宜条件下属无限生长型,每生长1张叶片平均需要有效积温52.0℃,在有效积温达544.4℃时叶片衰老死亡;单株水葫芦的分株生长与叶龄存在n-3的同伸关系,群体分株生长随有效积温的增加呈多项式曲线型增长;水葫芦从幼苗至第1次开花需要至少13张叶片的基本营养生长期,营养生长低于13张叶片时水葫芦不开花,花后植株在经过一段时间营养生长后,条件适宜时会再次开花。更多还原

【Abstract】 The biological characteristics of water hyacinth were studied through long-term observation.Water hyacinth kept growing indeterminately in suitable conditions.The growth of each leaf needed an average effective accumulated temperature of 52.0 ℃,and the consenescence,544.4 ℃.The tillering of individual plant displayed an n-3 stretch relationship with the leaf age of water hyacinth,while the tillering of the population showed a polynomial curve type growth with the increase of effective accumulated temperatures.A vegetative growth stage of 13 leaves was crucial for the flowering of water hyacinth from seedling.Under the appropriate growth conditions,the blossomed plant will flower again after a period of vegetative growth.更多还原