摘要
裂叶榆为东北地区珍贵用材树种。本文对其催芽方法、播种量、留苗密度、施肥技术等进行了比较系统的研究。试验指出:鲜种混沙塑料棚催芽的种子发芽率达47.6％,比未催芽的提高34％,每公顷鲜种播量为315～375 kg,气干种播量为90～150 kg,每公顷的适宜留苗密度为36万株,其苗木生长良好,成本低,经济效益显著;裂叶榆苗木施肥效果比较明显。
Ulmus laclnlata Mayr. is a precious broadleaf timber tree species in north-east of China. In the paper, on U. laciniata, procedure of pregermination, sowed norm, retaining seedling density, fertilization,etc. were studied comprehensively and systematically. The results indicated that germination rate of fresh sand-mixed seeds in grean house is 47.6 %. If the seeds are not pregerminated, its germination rate is 13.6 %. The suitable amount of fresh seeds or air-dried seeds for sowing is 315~375 kg/ ha or 90~150 kg/ha respectively. The best retaining seedling density is 0.36 million seedling/ha. The techniques of raising seedlings of U. laciniata characterized by low cost and more economical benefit.
出处
《林业科学研究》
CSCD
北大核心
1992年第2期182-187,共6页
Forest Research
基金
辽宁省科委1982年下达的"珍贵国叶树种研究"攻关课题的一部分
关键词
珍贵树种
裂叶榆
育苗
precious tree species
Ulmus laciniata
techniques of raising seedling
