Applying plantar fertilizer: 6000~7500 kg of decomposed organic fertilizer per mu, plus 20~30 kg of urea, 30~40 kg of superphosphate, 20~30 kg of potassium sulfate, 50 kg of bio-fertilizer, calcium silicate 80 Kg, 2 kg of zinc sulfate, 2 kg of copper sulfate, and 10-20 kg of magnesium sulfate or magnesium nitrate, evenly spread on the soil surface, and evenly rake into the cultivated layer of soil in combination with turning the ground.
Reasonable top dressing and squatting of seedlings are over. When the first ear fruit grows to the size of a walnut or 2 cm in length, the first top dressing is carried out. 15 kg of urea and 8 kg of potassium sulfate are applied per mu. When the third layer of fruit falls, it is the peak period of fertilizer demand. The second top dressing should be carried out, with 20 kg of urea and 10-12 kg of potassium sulfate per mu. After half a month or so, the third topdressing was carried out with the same amount of fertilizer as the second. After 15-20 days, a fourth topdressing was carried out with the same amount of fertilizer as the first.
Spraying 0.2% borax water solution + pepper Zhuangdi Ling during the flowering period can improve the fruit setting rate. During the whole growth period, it can spray 0.3%~0.4% potassium dihydrogen phosphate solution + pepper Zhuang Di Ling several times, spraying about 50 kg of liquid fertilizer per mu, can increase the yield by more than 10%.
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