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蓖麻的生育期长,在北方易受早霜低温和春旱的影响,种子萌动时吸水时间也较长,因而影响了蓖麻及时出苗,蓖麻产量降低。蓖麻播种前浸种催芽可缩短出苗期,从而使蓖麻苗齐、苗壮并延长蓖麻生育期,提高产量。做法是:(1)温水浸种将蓖麻种子放在45℃温水中泡20～24小时,捞出晾干后播种,可提前3～7天出苗。(2)温水催芽用45～50℃的温水浸泡6～8小时,将种子捞出后放在30～50℃的温床上进行催芽,待露出白芽后播种,可提前5～7天出苗。注意事项:①掌握好催芽的时间,可在播种前期3～4天进行。②蓖麻出芽后,应放在阴凉处散热,这样既可防止烂芽,又可使幼芽逐渐适应外界环境。③催芽时,种子不能拌农药和化肥,以防造成药害和灼伤。
Castor has a long growth period and is susceptible to low temperature and drought in early frost in the north. The water absorption time is longer when the seeds germinate, which in turn causes the castor to emerge in time and reduce the castor production. Castor seed soaking before germination can shorten the seedling stage, so that castor bean Qi, Miao Zhuang and prolong castor growth period, increase production. Practice is: (1) soaking the seeds of castor beans in 45 ℃ warm water soak for 20 to 24 hours, remove and dry to sow, can be 3 to 7 days in advance emergence. (2) warm water sprouting with 45 ~ 50 ℃ warm water soak for 6 to 8 hours, remove the seeds on the hotbed of 30 ~ 50 ℃ germination to be exposed after sowing white buds, 5-7 days in advance to emerge. Matters needing attention: ① mastered the time to promote germination, sowing in the early 3 to 4 days. Castor sprout, should be placed in the shade of heat, so that both to prevent rotten buds, but also to gradually adapt to the buds of the external environment. ③ germination, the seeds can not mix pesticides and fertilizers to prevent injury and burns.