摘要
在安徽滁州进行了美国岩榆引种育苗试验。结果表明：岩榆发芽率78%,1月中旬播种,32 d出苗,58 d时出齐。岩榆苗木前期生长均较慢,100 d时苗木平均高为16.5 cm,速生期始于7月份,且峰值出现在8月,到11月下旬生长逐渐停止。落叶时间较对照品种当地白榆迟7-14 d,且多数叶枯死后挂于枝头,经久不落。岩榆1 a生苗木平均高61.5 cm,最高达96 cm。
The seeds of Ulmus thomasii was introduced to sow in Chuzhou,Anhui.Experiment results showed that U.thomasii seedling began to emerge on the 32nd day and all the seedlings emerged on the 58th day.At the initial seedling stage these seedlings grew slowly.In July its growth speed was becoming faster than ever,and its growth peaks appeared in August.At the end of November U.thomasii came to stop growing and entered sleeping stage.Average height of one-year U.thomasii was 61.5 cm,the highest one was 96 cm.
出处
《河北农业科学》
2007年第5期31-33,共3页
Journal of Hebei Agricultural Sciences
关键词
岩榆
引种
生长
Ulmus thomasii sarg
Introduction of variety
Growth
