After the growth and development of spring vegetables enters the middle and late stages, the plants need to increase the amount of fertilizer, and they are prone to defertilization, leading to premature plant failure. While appropriately increasing the number of times of watering and watering, the fertilizer is applied once every 7 days in combination with watering. . Fertilizers should master the principle of “a small number of times†and avoid waste caused by excessive one-time application of chemical fertilizers, or excessive rooting caused by excessive concentrations. Pay attention to balanced fertilization, increase the amount of phosphorus and potassium fertilizers in order to improve the plant's resistance.
Each time, 15 to 20 kg of potassium fertilizer or 20 to 30 kg of NPK fertilizer is applied per acre; 20 to 30 kg of urea can also be used, and alternately used with 300 kg of decomposed chicken manure (dung water) or K-bambool. The low temperature in spring may cause the decline of plant root vigor, and the ability of sucking fertilizer is weak. The utilization rate of soil application is low and the efficiency of fertilizer is poor. 0.2% to 0.3% of urea or potassium dihydrogen phosphate is used for foliar dressing, which can quickly and effectively supplement nutrients. To meet the needs of birth, to achieve strong and prevent premature aging.
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