Sweet potato fertilizer 4 attention

Approaching the stage of sweet potato transplanting, potato farmers began to prepare the necessary means of production, and specially put forward several suggestions on sweet potato fertilization for your reference: first, light application of nitrogen fertilizer. Overweight nitrogen fertilizer will cause the stems and leaves to grow excessively and consume a lot of nutrients. When the fruit is expanded in the later stage, the nutrition supply is insufficient, which leads to the small fruit and the decrease of yield. Second, apply more phosphorus and potassium fertilizer. Phosphate fertilizer can loosen the soil and promote flower bud differentiation, while potassium fertilizer can promote the stout stem and fruit expansion of sweet potato. Third, re-apply organic fertilizer. Once I heard a potato farmer say, "there was no chemical fertilizer more than 40 years ago. The sweet potatoes we planted with pig and cow dung can weigh more than 10 jin, have a high yield and taste good. Why can't we grow such sweet potatoes now?" In fact, this shows a problem: sweet potatoes and other tuber crops strongly like organic fertilizer, organic fertilizer has stable effect and strong stamina, which is incomparable to chemical fertilizer. Fourth, apply foliar fertilizer skillfully. Ten days before the fruit expansion, the leaves must be sprayed with potassium dihydrogen phosphate. Fifth, make good use of biological fertilizer. As the saying goes, "if you want to grow good land, you must first raise good soil." Biological bacteria can play a very unique role in disease resistance and soil improvement.