Sweet potato is an important food crop and important livestock feed. Most rural families will plant them. The yield of sweet potato is gene
Sweet potato is an important food crop and important livestock feed. Most rural families will plant them. The yield of sweet potato is generally ok, but if it is flooded or there is too much rain, the yield will drop, and it will be higher in fertile and deep soil, so the yield of sweet potato is generally supplied by chemical fertilizer. How to increase production through fertilization, let's take a look.
1, principle of fertilizer demand
Nitrogen fertilizer promotes leaf photosynthesis and stem and leaf growth. Use in moderation. Excessive use will lead to root cell cork. Phosphorus fertilizer can promote root cell division and help nutrient absorption. Potassium fertilizer can improve partial photosynthetic efficiency, help root growth and increase the number and weight of root tuber. In fact, potassium fertilizer has the greatest influence on the growth of sweet potato, followed by nitrogen fertilizer and phosphorus fertilizer. The effect is most obvious when used together.
2, measuring fertilizer
Sweet potato has strong adaptability to soil and soil pH, and can be planted at 4.2 ~ 8.3. It likes thick, loose soil which is convenient for irrigation and drainage. Before planting, it is necessary to detect the contents of nitrogen, phosphorus, potassium and organic matter in the soil, and some also need to detect the pH value of the soil. After the experiment, fertilization or improvement of planting soil can be carried out as needed. Formula fertilization can also be used.
3. Fertilization method
Generally, one acre of land can be applied with 200 kg of double patented high-potassium compound fertilizer, in which the ratio of nitrogen, phosphorus and potassium is 2: 1: 3. Don't use too much nitrogen fertilizer, it is easy to grow vines and not bear sweet potatoes. Some livestock manure can be used after fermentation, while poultry manure is too hot to use. Without nitrate nitrogen fertilizer, sweet potatoes crack easily. An acre uses 400 Jin of biological bacterial fertilizer, and plant ash is used as base fertilizer.
4, fertilization skills
Potassium deficiency in the early stage, short internodes, small leaves, potassium deficiency in the late stage, green pulse. Semi-decomposed organic fertilizer is used as base fertilizer in sandy soil. The clay has completely decomposed. Apply another 300 Jin of plant ash per mu. Plant ash does not use ammonium bicarbonate, which affects nitrogen absorption. Sweet potatoes do not need potassium chloride, avoid chlorine. The vines are soaked in potassium to accelerate their growth. 1 kg potassium sulfate and 50 kg water. Soak the vine seedlings without soaking the terminal buds, take them out and dry them for an hour. Plant it for more than a month, and apply it with 20 kg of potassium sulfate per mu. When the vines grow to 1 m, use 100 kg plant ash and sprinkle in the morning.
In order to improve the yield of sweet potato, it is necessary to apply fertilizer skillfully and correctly according to the demand of fertilization. Growth promotion will increase accordingly.
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