Techniques for the Seedling Culture of Ulmus laciniata

Ulmus laciniata 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.