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It's important for sweet potatoes to get a good base fertilizer
To apply base fertilizer to sweet potatoes, farmyard manure should be the mainstay, supplemented by chemical fertilizers, and it should be combined with soil fertility, soil quality, and fertilizer efficiency. First, look at the land: high-fertility plots, the use of base fertilizer is less, and to avoid the application of nitrogen fertilizer. Infertile and can be applied more, and should be with a suitable amount of nitrogen fertilizer. Second, to see the soil quality: the amount of base fertilizer application of sandy land can be less appropriate, Shi Shi should be appropriate deeper, the amount of fertilizer can be more appropriate. The application amount of base fertilizer in clay soil can be more appropriate to improve the soil structure. Third, look at fertilizer: Generally less nutrients containing less fertilizer, fertilizer containing less nutrients more fertilizer, fertilizer effect of stable and long fertilizer and fertilizer effect of fast fertilizer, delayed fertilizer and quick-acting fertilizer with the best. Fourth, look at the output: General acres of Fresh Potato 1500 ~ 2000 kg of land, require Mushi organic fertilizer 2500 ~ 4000 kg; per mu plot of 2500 ~ 3500 kg, Mushi organic fertilizer 5000 ~ 7000 kg; per mu 4000 More than kilograms of land, require Mushi organic fertilizer 7500 ~ 12500 kg, superphosphate 40 kg, plant ash 100 ~ 150 kg. Fifth, the base fertilizer to maturity: the raw organic fertilizer can not be absorbed into the soil after the application, to the late high temperature and rainy season, the base fertilizer will quickly decompose, resulting in a long vine stem. In addition, because the uncooked fertilizer is not fine or broken, it will affect the soil moisture. Sixth, the concentration of deep facilities: organic fertilizers, fertilizers should be layered. Organic fertilizer has slow fertilizer effect and long fertilizer effect. It should be applied to the inner layer of the axilla. It can not only loosen the soil, facilitate the growth of roots, but also enable the lower layer of nutrients to continuously supply plant growth. Fertilizer applied to the upper inner layer of the locust can promote early rooting of the potato seedlings. In this way, the nutrient needs of the different growth stages of the aboveground and underground parts of the seedlings can be met.