The application amount of base fertilizer in Putian should be determined according to the soil fat and thin, generally choose loose soil, fertile, organic matter-rich, irrigation and drainage convenient field, combined with soil preparation applied per acre of livestock manure 2500-3000 kg, diammonium 25 kg, sulfuric acid Potassium 10-15 kilograms, quick lime 50-100 kilograms, superphosphate 50 kilograms, cake kilograms 150 kilograms.
Lotus roots need to be topdressed 3 times throughout the growing season. For the first time in 1-2 leaves (approx. 25 days of colonization), combined with cultivating and weeding, 3-5 kg ​​of urea per mu or 750-1000 kg of human waste was applied; the second time there was 5-6 The vertical leaves (approved for 40 days after planting, which is about to be sealed) are applied with 20-25 kg of compound fertilizer per mu, 5 kg of urea, or about 800 kg of human fecal urine fertilizer; the third topdressing is carried out when the leaf is stopped. At this time, the beginning of scab, which is to recover fertilizer, per mu application of manure fertilizer 1000-1500 kg, cake fat 30-50 kg.
Fertilization should be avoided at noon in the hot sun, and shallow water levels should be used to facilitate the infiltration of fertilizers into the soil and then irrigation to the original depth. In Sham Shui Po, the fertilizer is easy to lose. Therefore, it is not possible to apply liquefied fertilizer directly. Solid fertilizers should be applied and buried in mud ponds. When topdressing, first of all, the fertilizer and river mud are fully mixed to make a muddy mass and then applied to Putian.
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