北京地区不同秋眠级苜蓿品种生长动态比较

对不同苜蓿Medicago sativa品种生长动态的研究表明，不同秋眠级苜蓿达到某个生育期的早晚顺序是极非秋眠型、非秋眠型、半秋眠型、秋眠型。在一个生育期内，苜蓿自然高度的动态变化符合Logistic曲线，相关指数都在0.954 1以上，相关极显著。不同秋眠级苜蓿的快速生长期都处于相应的分枝期与现蕾期之间，生长量占总生长量的比例均超过50%。灰色关联度分析表明，不同秋眠级苜蓿的生长在自然条件下受空气温度、光照强度、相对湿度等气候因素影响，其影响程度排序为空气温度>光照强度>相对湿度。

Comparative analysis of the growth among alfalfa varieties with different fall dormancy rate in Beijing

Studies on the dynamic growth of different alfalfa varieties showed that the order of alfalfa varieties with different fall dormancy rates reached a same growth period was as follows: extreme non-dormancy type,non-dormancy type,half-fall dormancy type and fall dormancy type.In a period of fertility,the dynamic change of alfalfa height was fitted to the Logistic model(r>0.954 1).The fast-growth period of different alfalfa varieties were in branching and heading periods,which accounted for more than 50% of to...