亚热带中山立地鸭茅分蘖丛生长与再生的定量分析

对亚热带中山立地鸭茅分蘖丛的生长与再生特征的定量分析表明，在５月份开花期和８月份再生草的取样中，鸭茅分蘖丛的蘖数均随着丛径的增加里直线增加；丛生物量、丛枯死量分别与丛径、丛蘖数之间均有极显著的正相关；平均单蘖重随着丛径的增加均呈变形双曲线函数减少，随着丛蘖数的增加均呈幂函数减少；抽穗率随着丛径和丛菜数的增加均呈直线下降．在生长季前期，鸭茅分蘖丛的生长策略是将大部分能量投入生殖生长．

Quantitative analysis of growth and regeneration of Dactylis glomerata tiller tuft on subtropical mid-mountain sites

Quantitative analysis of growth and regeneration characters of Dactylis glomerata tiller tufts shows that during its blooming and vegetative growth periods, the number of tillers per tuft is linearly increased with increasing tuft size. The living and dead biomass of the tuft is positively correlated to its size and tiller number f respectively. The mean weight of each tiller is respectively decreased hyperbolically and power-functionally with increasing tuft size and tiller number,and the earing rate is linearly decreased with the increase of them. The strategy for the growth of tuft is to throw most part of energy into its reproductive growth at the earlier growing stages.