【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。更多还原

【Abstract】 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.更多还原