河北省怀安县金沙滩林场在1958年培育桑树苗木二亩,七十五天生的苗高达8—15公分,最高的达20公分,地际直径0.2公分,幼苗生长良好。现将桑树厚度复土育苗方法介绍于下:一、育苗圃地为渗水较好的沙质壤土,地下水位7公尺,土壤酸碱度为8.0。二、种子在播种前四天,用三十度温水进行浸种处理(水必须高于种子5-7公分),保 Jinshatan Forest Farm in Huai’an County of Hebei Province cultivated two mu of mulberry seedlings in 1958. The seeding height of seventy-five days was 8-15 cm, the highest was 20 cm and the ground diameter was 0.2 cm. The seedlings grew well. Now mulberry thickness reclaimed soil nursery method introduced in the following: First, the nursery for better seepage of sandy loam, groundwater level of 7 meters, the soil pH value of 8.0. Second, the seeds four days before sowing, soaking with thirty degrees warm water treatment (water must be higher than the seeds 5-7 cm), Paul