1、浸种。把选好的种子放到30～40℃温水中(二开一冷),3～4小时后,切开种子有高粱粒大的干心时,开始催芽。 2、催芽。发芽率低,发芽势弱的种子采用沙床催芽。沙床催芽的方法是:(1)建床选背风向阳处,建成前墙高45～50厘米,后墙高60～70厘米,宽1米左右,长度根据种子数量而定的苗床。床的两头各留一个通气孔。(2)备料米粒大小干沙(每百斤干沙拌10公斤种子)塑料薄膜、草帘子。(3)热水拌沙用80～90℃热水拌沙,拌成手握时有水渗出,但不下滴为宜,拌水后的沙温30～40C。(4)催芽把浸好的种子均匀地拌在温湿沙中,放到沙床上,厚20—25厘米,然后盖3厘米左右 1, soaking. The selected seeds into warm water 30 ~ 40 ℃ (two to open a cold), 3 to 4 hours later, cut the seeds sorghum grain big heart, began to germination. 2, germination. Low germination rate, weak seed germination using sand bed. Sand bed sprouting method is: (1) Select bed leeward sunny place, built before the wall 45 to 50 cm high, the back wall of 60 to 70 cm wide and about 1 meter, the length of seedbed according to the number of seeds. Leave one vent on each end of the bed. (2) Preparation of grain size dry sand (per kilogram of dry mix 10 kg seed) plastic film, straw curtain. (3) mixing hot water with 80 ~ 90 ℃ hot water mixing sand, mixed into a hand when the water seepage, but not under the appropriate, after mixing the sand temperature 30 ~ 40C. (4) germination to dip the seeds evenly mixed in warm and humid sand, on the sand bed, 20-25 cm thick, and then cover about 3 cm