半秋眠和非秋眠紫花苜蓿生长规律及再生性研究  

The research of growth and regrowth pattern of non-dormancy and semi-dormancy alfalfas.

作　　者：安渊[1] 胡雪华[1] 陈凡毅[1] 王俊[1] 张晓春[1] 

机构地区：[1]上海交通大学农业与生物学院,上海市201101

出　　处：《中国草地》2003年第5期43-47,共5页Grassland of China

基　　金：上海市科委攻关项目(013912106);国家科委重大专项(2002BA518A)资助

摘　　要：研究了半秋眠和非秋眠紫花苜蓿在上海的生长规律。结果表明:半秋眠和非秋眠紫花苜蓿月产草量呈现"双峰"型变化趋势,第一个高峰值在5月,非秋眠苜蓿的峰值持续到6月;4～6月是两类苜蓿生长较快的时期,期间的累计产草量占全年总产量的53.46%～65.2%;第二个生长高峰值出现在8月份,但明显小于第一个高峰值(p<0.05);7月份两类苜蓿的产量降至谷底,出明显的"夏眠"阶段;非秋眠品种的耐热能力高于半秋眠品种,月株高持续增长期比半秋眠品种长一个月,并且在"夏眠"后株高增加的幅度也高于半秋眠品种。The growth pattern of alfalfa,with 5～9 fall dormancy rating,was studied in Shanghai during 2001-2002.The dry yield of each cultivar was weighted and height was measured in each month in the year of 2002. The result indicated that there were two highest yield values.One was in May,and the non_dormancy cultivars can sustain their highest value to June.The other highest value occurred in August,but the value was lower significantly than that in May and June.The growth rate was very high in the period of April and June,and the accumulative yield was account for 53.46%～65.2% of total yield in this period. The yield was decreased to lowest value in July, while aestivation occurred in alfalfa.The hot tolerance of non_dormancy cultivars was higher than that of semi_dormancy cultivars.

关 键 词：华东地区 紫花苜蓿 秋眠级 生长规律 再生性 产量 株高 

分 类 号：S541.9[农业科学—作物学]