异种生境下不同品种谷子数量特征的比较研究

谷子(Setariaitalica L.Beauv)是一种重要的粮食作物,其抗旱性强营养价值高。通过9月下旬谷子籽实成熟期,在净月和长岭取样测定,研究了中国谷子和日本谷子在生殖生长、生物量分配、以及各性状之间的比较分析。谷子的生殖生长既受遗传物质决定,也具有较大的生态可塑性,日本谷子的生态可塑性大于中国谷子。不同生境不同趋异型谷子的穗、茎、叶、叶鞘生物量与植株生物量之间存在着极显著的正相关关系,均随着植株生物量的增加而成线性函数、指数函数和幂函数形式增加。而日本谷子具有更稳定的异速生长规律,在谷子的茎生物量拟合曲线中,其方程的确定系数R2值在0.7997~0.8826之间,又可以看出茎在谷子生殖生长中具有更稳定的异速生长规律。

Comparative Study on the Quantity Character of Different Breed Millet in Different Habitat

Setariaitalica L.Beauv is a kind of important food crop with strong drought resistance and high nutrition value.The paper studied the reproductive growth,the biology allocation and the character comparison of Chinese millet and Japanese millet,which are sampled in Jingyue and Changling in the last ten days of the September.The reproductive growth of millet is determined by the germ plasm,and has biggish ecology plasticity.The Japanese millet is bigger than Chinese millet in ecology plasticity.It showed a significant positive relationship between the biomass of the spike,the stem,the leaf and the sheath and the biomass of plant in different habitat or ecotype,and they all rise in the form of linearity function,index function,and power function with the biomass of plant.The Japanese millet has more stable allometry regulation.In the fit curve of the stem biomass of millet,the certain coefficient R2 is between 0.7997 and 0.8826,and the stem has more stable allometry regulation in reproductive growth of millet.