大葱春季育苗时间表

2025-04-01 20:51:58
推荐回答(1个)
回答(1):

现在,正是秋栽大葱春季育苗的最佳时节,育苗时,朋友们要抓好以下六项技术要点。
一、地块选择:应选择没有种过葱、蒜、韭、洋葱的地作育苗地,地势平坦、背风向阳、壤土或沙壤土、土壤肥沃、排灌方便,以利于育出好苗。  

二、整地施肥:每亩育苗地施入腐熟有机肥2500公斤左右,施肥后浅耕、耕耱、作畦。畦长一般10米左右、宽1米左右。畦子整平后,每亩再施5公斤尿素和5公斤磷酸二铵,土肥混合均匀后,踏实耧平。育苗1亩可栽5亩左右。   

三、选择优种及种子处理:要选择产量高、抗病力强、品质优的品种,注意发芽率要高、发芽势要强,如可选择章丘大葱等。一般栽一亩大葱需种子300—500克,育一亩大葱苗需种子1.5公斤左右。春播育苗,一般出苗速度较慢,最好采用催芽后再播种的方法。催芽时,先用18℃左右温水浸泡种子10小时左右,捞出后,放入瓦罐内,瓦罐内下垫湿布,种子上面盖严湿布,置于18℃的环境中,每天用清水淘洗一次,3—4天时多数种子露白后即可播种。  

四、适时播种
在冀中南平原地区,一般在4月上中旬播种为宜。在播种时,常采用撒播的方法。首先对苗床灌足底水,水渗完后撒播种子,来回几次重复撒播,保证落粒均匀。上盖细土1厘米厚。为了防止跑墒和提高地温,播种后给苗床上面最好加盖塑料薄膜。  
五、出苗期的管理:播种后3天左右,畦面覆土略有干燥并出现裂缝,畦梁能站住人时,可用钉耙将畦面耧平耧细,有利于保墒和出苗整齐。  

六、苗后管理。4月下旬开始浇水,此后每10—15天浇一次水,每次浇水时每亩撒施尿素5公斤左右,促进快速生长。5月底起,停止浇水追肥,蹲苗20天左右,使其健壮,增强抗倒伏、抗病能力,以防定植后在烈日下出现瘫倒现象,影响缓苗。只要抓好以上技术要点,就能育出好苗,为高产打好基础。

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