8个引进苜蓿品种的生长特性比较研究

通过对国外引进的 8个苜蓿品种在同一环境条件下的生育期、生物量及其相关性状的动态变化特征进行比较研究 ,结果表明 ,8个苜蓿品种的返青期、分枝期有较大差异 ,而现蕾期、开花期差异较小 .8个苜蓿品种的生长性状动态变化为 :株高和茎粗在品种间差异很小 ,株高呈直线增长趋势 ,而茎粗的增长非常缓慢 ;8个苜蓿品种的叶面积在不同生育期的动态变化为 :返青期品种间无差异 ,从分枝期到开花期品种间差异很明显 ;分枝数在整个生育期品种间差异较大 ;生物量与其相关性状叶面积、茎粗和分枝数呈极显著正相关 ,而与株高呈不显著正相关

Comparative study on the growth characteristics of 8 foreign alfalfa cultivars

The dynamics of the growth period, biomass and other growth relative characters of 8 Alfalfa cultivars introduced from overseas were studied in this experiment by planting in the same environment. The results showed that:There were obvious differences on the dates of reviving and ramification, and little difference on the budding date and flowering date among the 8 alfalfa cultivars. The plant height and stem diameter of the 8 varieties showed little difference, plant height increases straightly , stem diameter adds slowly; there were no distinctness for the total leaf areas in the reviving period among the 8 alfalfa cultivars, but the distinctness were obvious from the ramification period to flowering period; for the shoot number there were big distinctness in the whole growth period among the 8 alfalfa cultivars. There were significant correlations between biomass with total leaf areas and stem diameter, as well as shoot number, and no significant correlation between biomass and plant height.