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1.出苗不齐 有两种情况:一是床边苗多中间苗少。这是苗床棚架太高太陡水分不足造成的,防止方法是不要将拱棚搭成屋脊状,播种时床中间适当多播一点。二是出苗成块状,一团稀一团密,一处有一处无。这是播种不匀、浇水不匀或拱棚高低不一造成的,防止办法是均匀播种浇水,棚高尽量均匀一致。
1. Emergence missing two situations: First, less bedside seedlings more intermediate seedlings. This is caused by the scaffolding too tall scaffolding too steep water, to prevent the arch is not made of ridges, sowing the middle of the bed appropriate multicast a little. The second is the emergence of massive, a mass of a thin dense, there is a place without. This is uneven sowing, uneven watering or varying levels caused by the arch, to prevent the uniform planting is to sow water, shed as high as possible uniform.