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萝卜在生长后期,肉质根往往发生空心症,严重影响萝卜产量和品质。出现空心症的萝卜,表皮粗糙,肉质根中空,并含有一种特殊辛辣味。因此,种植萝卜防空心十分重要。 萝卜空心是由于缺硼而引发的生理病害。常用的防治方法是喷施硼酸或硼砂。具体方法是,从萝卜苗出现2～3片真叶开始,到收获前半月左右停止,每隔20天进行一次叶面喷施。每1000平方米用硼酸150克或硼砂235克。由于硼砂溶于水,
Radish in the late growth, flesh root often Hollow disease, seriously affect the yield and quality of radishes. Hollow radish, rough skin, fleshy root hollow, and contains a special spicy flavor. Therefore, planting radish anti-hollow heart is very important. Radish hollow is due to lack of boron caused by physiological diseases. The common method is to spray boric acid or borax. The specific method is to appear from the radish seedlings 2-3 true leaves began to stop about half a month before harvest, once every 20 days foliar spray. Boric acid 150 grams per 1000 square meters or 235 grams of borax. As borax soluble in water,