Fertilization methods for increasing yield of sweet potato

Sweet potato is not only an important food crop, but also an important livestock feed. Most rural families will plant it. The general yield of sweet potatoes is OK, but if there is a flood, or if there is too much Rain Water, the yield will decline, and the yield will be higher in the fertile and deep soil, so the increase of sweet potato production usually depends on the supply of fertilizer. Let's find out how to increase production through fertilization.

1. The principle of fertilizer requirement

Nitrogen fertilizer increased leaf photosynthesis and promoted stem and leaf growth. Use in moderation. Too much use can cause root cells to be corked. Phosphate fertilizer can not only promote root cell division, but also help nutrient absorption. Potash fertilizer can improve some photosynthetic efficiency, help root growth, and increase the number and weight of root tubers. In fact, potash fertilizer has the greatest impact on the growth of sweet potatoes, followed by nitrogen fertilizer and phosphate fertilizer. The effect of combined use is the most obvious.

2. Detection of fertilization

Sweet potato to soil, soil acidity and alkalinity, strong adaptability in 4.2 to 8.3 can be planted, like thick, loose, convenient soil for drainage and irrigation. Before planting, it is necessary to test the content of nitrogen, phosphorus and potassium in the soil, as well as the content of organic matter, and some need to test the acidity and alkalinity of the soil. After testing, you can apply fertilizer as needed, or improve the planting soil. It can also be fertilized with formula.

3. Fertilization method

Generally, 200 jin of double patent high potassium compound fertilizer can be applied to one mu of land, in which the ratio of nitrogen, phosphorus and potassium is 2: 1: 3. Do not use too much nitrogen fertilizer, it is easy to grow vines and do not bear sweet potatoes. Some livestock manure can be used after fermentation, but poultry manure is too high in calories to be used. Sweet potato is easy to crack without nitrate fertilizer. 400 jin of biological fertilizer and plant ash are used as base fertilizer per mu.

4. Fertilization skills

Potassium deficiency in the early stage, short internodes, small leaves and green veins in the later stage. The sandy soil uses semi-rotten organic fertilizer as base fertilizer. The clay is completely rotten. Apply another 300 jin of plant ash to one mu. Plant ash is not used with ammonium bicarbonate, which affects nitrogen absorption. Sweet potatoes do not use potassium chloride and avoid chlorine. The rattan is soaked in potassium to speed up its growth. 1 jin of potassium sulfate plus 50 jin of water. Soak the rattan seedlings without soaking the top buds and take them out for an hour to dry. After planting for more than a month, 20 jin of potassium sulfate was applied to one mu. When the vine grows to 1 meter, use 100 jin of plant ash and sprinkle it in the morning.

In order to increase the yield of sweet potato, it is necessary to apply fertilizer skillfully and correctly according to the demand of fertilization. If the growth is promoted, it will increase accordingly.