How to apply potash fertilizer in sweet potato planting? Sweet potato has the characteristics of high yield, strong regeneration ability and resistance to thinness. Sweet potato is a potassium-producing crop. Among the three factors of nitrogen, phosphorus and potassium of fertilizer, the demand of potassium is the largest, followed by nitrogen, phosphorus is the least, and the ratio of nitrogen, phosphorus and potassium in roots is 2:1:3. This is because potassium can prolong the functional phase of the leaf, promote the activity of photosynthesis and amylase, accelerate the synthesis and operation of starch, and potassium can strengthen the activity of root formation layer, which is beneficial to the formation and expansion of roots. If potassium is deficient, there will be internodes in the early growth of sweet potato, the petioles will become shorter, the leaves will become smaller, and the potassium deficiency and old leaves will be seriously chlorotic and gradually necrotic and fall off, which will have a great impact on yield. Therefore, scientific application of potassium fertilizer is an important measure for high yield and stable yield of sweet potato. The main application methods are: First, the bottom. Applying potash to the base fertilizer is the basis for high yield. The base fertilizer should be based on high-quality organic fertilizer. The sandy soil retains water and maintains poor fertilizer capacity. It is better to use semi-humic organic fertilizer as base fertilizer. Sweet potato is a chlorine-free crop. Potassium chloride cannot be applied. Second, the vine. Potassium immersion in potassium can improve survival and promote early onset. The specific method is as follows: 0.5 kg of potassium sulfate and 25 kg of water are fully stirred to prepare a concentration of 2%, and the cut sweet potato vine seedlings are soaked in potassium solution, and the top leaves should be exposed to the water surface. Generally, after soaking for 1 hour, take it out and dry it to transplant it. Third, pursue. About 40 days after planting, 10 kg of potassium sulphate per acre was taken, and deep application was carried out at the opening point, and the soil was covered after application to promote the formation and expansion of the roots. In the expansion period of potato tubers, if the soil is moist, the rain is much, and when the vines and leaves turn yellow, more ash can be applied. Fourth, spray. In the late growth stage of sweet potato, foliar application of potassium fertilizer has obvious effect of increasing yield. Generally, it should be sprayed in the evening to facilitate leaf absorption and improve fertilizer efficiency. This article URL: How to apply potash fertilizer to sweet potato planting Silk Face Mask,Face Mask,Cotton Face Mask,Disposable Flat Face Mask Puyang Degren Medical Equipment Co., Ltd. , https://www.degrenyuwei.com