Early and rational fertilization of cassava

Early fertilization can make cassava seedlings supplement nutrition in time, promote the rapid growth of cassava seedlings, and help to increase the yield of fresh cassava. at the same time, it is beneficial to cover the surface of cassava seedling stage as early as possible, and play a better role in soil and water conservation. It is generally recommended that one month after cassava planting, one full application can be applied at a time, when the seedling height is about 20 cm, combined with ploughing and weeding and fertilization, 20 cm away from the cassava stem, fertilizing according to the principles of near application, hole application and shallow application, in order to facilitate the early absorption of fertilizer by cassava. In addition, if the lack of fertilizer is found in the middle and later stage of cassava, it can be replenished. Fertilization should be recommended according to the diagnosis of soil fertility and cassava nutritional requirements, and the amount of fertilizer should also be determined by the thickness of the land. for example, when planting cassava in the fertile soil of reclaimed new wasteland, it is recommended not to apply fertilizer in the first two years of continuous cropping of cassava. After thin land or continuous cropping of cassava for 2 years, N:P2O5:K2O=2:1:2 is the best balanced fertilization ratio, and after 5 years of continuous cropping, N:P2O5:K2O=3~4:1:3~4 is the best balanced fertilization ratio. When applying fertilizer, we should adjust the proportion of formula properly after adjusting measures to local conditions and considering different factors such as varieties. Generally recommended amount of fertilizer: 1 ton of organic fertilizer per mu, 715 kg of urea, 7kg of superphosphate, 7kg of potassium chloride, can basically maintain a stable yield in successive years, maintain a yield of about 3 tons of fresh potatoes per mu, excluding fertilizer costs, the net income can be increased by 200,400 yuan per mu.