羊草种群生物量生殖分配的初步研究

Preliminary studty on biomass reproductive allocation in Leymus chinensis population.

对羊草种群生物量生殖分配的研究表明，在生殖生长过程中，种群用于根茎和营养生长的生物量生殖分配占有绝对优势比例，而用于有性生殖的生物量生殖分配比例较小，在１０ ％ 以下．在羊草种群构件生物量生殖分配中，根茎和营养枝的叶占有较大比例（２０ ％ ～４０ ％ ） ，而用于有性繁殖体种子生产的比例很小，在１ ．５ ％ 以下．

The study shows that the allocation rate of the biomass in Leymus chinensis for its rhizome and vegetative growth was much higher, and that for sexual growth was less than 10%. The ratio of the biomass of rhizome and vegetative shoot was as much as 20～40% of the total, while that of seed was less that 1.5%. The low investment in sexual reproduction of L.chinensis was the main reason for its low seed production.