Sweet potato soil testing and formula fertilization technology
October 12 20:01:13, 2018
Sweet potato has strong adaptability to soil and is one of the most resistant to soil acidity. It is also more resistant to alkali. It has little effect on the yield between pH 5.5 and 8.0. However, from the physical properties of the soil, it is ideal for soft, well-ventilated soils. Good ventilation conditions are one of the important conditions for root formation and hypertrophy, and the three elements of fine root absorption fertilizers are significant. Sweet potato requires the most potassium, followed by nitrogen, phosphorus, and has a strong ability to absorb phosphorus from the soil. For every 100 kilograms of fresh sweet potato roots, about 0.55 kg of nitrogen (N), 0.18 kg of phosphorus (P2O5), 0.55 kg of potassium (K2O), and a ratio of nitrogen, phosphorus and potassium of about 2:1:3. Sweet potato advocates the application of organic fertilizer as base fertilizer, and the topdressing is generally divided into three times, which are divided into seedling fertilizer, sandwich fertilizer and crack fertilizer. The seedling fertilizer can be applied by means of dropping plants after the insertion; the edged fertilizer should generally be applied about 1 month after the insertion, and the ditch is ditched on the side of the ridge, and the fertilizer is applied to both sides of the ridge. The application period of the cracked fertilizer should be determined according to the specific conditions. In the case of less base fertilizer, insufficient growth of mid-term stems and leaves, drought and early-maturing varieties, it is necessary to apply early, and vice versa.
Hua County: Yue Xiuli
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