播种前,首先进行种瓣选择,去除带有伤残、病斑及过小蒜瓣,单瓣重在5~6克为宜。并将蒜瓣上残破鳞茎盘(蒜踵)去除,不剥蒜皮。同时,种植白皮品种尽可能选用蒜皮白色的蒜头作种蒜,去除皮色褐黄的蒜头。
大蒜畦栽的方法有扎孔法和开沟法两种。扎孔法是按行株距,把蒜瓣插入土中,微露尖端,并覆盖2厘米细土。开沟法是使用特制开沟器具开深5厘米的浅沟,行距17厘米,先撒入辛硫磷颗粒剂每亩5千克,然后按株距15厘米播种。播后耧平垄沟,使种瓣顶部以上盖土3~4厘米。两种方法播种后都要压实覆土,做到下松上实,并掌握好适宜的播种深度。播种时,注意将蒜瓣背面与播种沟同方向。直立栽种一定要将底部朝下,直立插入沟中,切忌斜插。大蒜播种时,如遇干旱,则要在播后浇水。
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在家里怎样种大蒜