Five methods for high yield of sweet potato

Farmers planting sweet potatoes want high yield of sweet potatoes. However, due to improper handling of certain links, it often results in injury and loss of labor, not only did not increase production, but reduced production. To achieve high yields, pay attention to the following five technical issues. 1. Choose disease-free seedlings. Disease-free seedlings are those that do not injure heat. The roots of the diseased seedlings are red at about 2 cm, and when they are planted in the ground, “living in the ground” occurs, which reduces production. It is not appropriate to choose seedlings that have been sprayed with chemical fertilizers or other growth agents. Such seedlings are delicate and fragile, with low survival rates and small and small tubers. At the same time, pay attention to planting seedlings without rot leaves. 2. Avoid direct planting or slanting planting in the field when transplanting, should not be inserted or oblique inserted in the seedlings. In this way, the method of transplanting seedlings is slow, the survival rate is low, the growth is weak, and the yield is affected. The correct transplanting method is to plant the roots of the seedlings in the arc, easy to survive, after the soil is sealed, the arc bottom is preferably 5 cm away from the ground surface. 3. Avoiding growth during the growing season Many farmers in the growing period of sweet potatoes and the rainy season, in order to make the field ventilation and light or nutrient concentration and use the method of turning, this is a wrong method, because the plant leaves after the orderly planting was beaten In disorder, photosynthesis is weakened, the root system is also affected, and the physiological function is disordered, resulting in reduced production. The correct way to do this is to mention that it is possible to prevent roots from falling when you gently lift and drop it. 4. In time to chase long block fertilizer in the sweet potato root formation period, it is necessary to timely recovery of fertilizer materials to promote production, can be followed by good fermentation of human waste, pig manure, ash and other plants. Plant ash can also prevent the occurrence of melanopsia in sweet potatoes while supplying potassium. 5. Timely late harvest In the past, people believed that if the sweet potatoes were to be stored well, they must be harvested before entering the frost. This is inaccurate. As long as the sweet potato is not frozen in the field or after harvest, it can be safely stored. Harvesting before frost will result in a significant reduction in production. Practice has proved that the scorpion block is even larger. The correct harvesting period is based on the fact that the ground surface does not produce frozen ground, because light roots have the largest root swelling during the half-month period from light frost to frost, and the nutrient transfer rate is fast. This is the final period of yield increase and must not be harvested early. China Agricultural Network Editor