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为了定量分析花果期稗草和马唐无性系生殖分蘖株生长和繁殖分配规律,试验采用野外大样本随机挖取无性系分蘖株的方法在稗草和马唐单优群落进行取样,分别测定了株高、穗长、茎生物量、叶生物量和穗生物量。结果表明:随着株高的增加,稗草和马唐穗长均呈直线增长,而穗生物量均呈幂函数增长;稗草的穗生物量与总生物量之间呈极显著幂函数正相关关系(P<0.001),马唐的穗生物量与总生物量之间呈现极显著线性正相关关系(P<0.001)。稗草和马唐的生殖生长比率均与株高呈极显著幂函数负相关关系(P<0.001)。稗草和马唐不同构件生物量分配表现为茎>穗>叶,且稗草茎生物量分配和叶生物量分配均显著高于马唐(P<0.01),穗则相反(P<0.01)。
In order to quantitatively analyze the growth and reproductive distribution of barnyardgrass and barnyardgrass tillers in flowering stage, Plant height, spike length, stem biomass, leaf biomass and ear biomass. The results showed that with the increase of plant height, the spike lengths of Echinochloa crusgalli and C. cinnabarinus increased linearly, while the spike biomass increased exponentially. Echinochloa crusgalli spikelet biomass and total biomass had a very significant power-positive function (P <0.001). There was a significant linear positive correlation between spike biomass and total biomass of Crabgrass (P <0.001). The reproductive growth rates of barnyardgrass and crabgrass were negatively correlated with plant height (P <0.001). The biomass allocation of different components of barnyardgrass and Crabgrass was stem> spike> leaf, and the biomass and leaf biomass of barnyardgrass were significantly higher than that of Crabgrass (P <0.01) and spike (P <0.01) .