The nutrients needed for lotus root growth and development come from the photosynthesis of lotus leaves; on the other hand, they come from the soil, while the original fertilizer in the soil is limited (including the base fertilizer), and it will grow more and more as the plant grows and develops. Less, so it is necessary to topdress in time. First, the need for fertilizer characteristics Lotus root is a high-efficiency economic crop with expanded underground rhizomes as the main product, and it is also a crop with a large amount of fertilizer. Generally, the lotus root per acre absorbs about 7.7 kg of pure nitrogen, 3.0 kg of pure phosphorus and 11.4 kg of pure potassium. The absorption ratio of pure nutrients of lotus root to NPK is about 2:1:3. Second, fertilization technology 1. Apply enough base fertilizer The base fertilizer can supply the nutrients needed for the whole growth period of the lotus root, create good soil conditions for its growth and development, and have the functions of improving the soil and fertilizing the soil. The application amount of the base fertilizer in Putian should be determined according to the soil fertility. Generally, the soil is loose, fertile, rich in organic matter, convenient for irrigation and drainage, combined with 2500-3000 kg of decomposed organic fertilizer per mu, and the right-way general-purpose compound fertilizer. 60 to 80 kg, and apply calcium, boron, zinc and other micro-fertilizers. 2, reasonable topdressing Lotus roots topdressed 3 times during the whole growth period. The first time is applied in 1 to 2 leaves (about 25 to 30 days), combined with cultivating and weeding, applying 750-1000 kg of human excrement per acre or 25-30 kg of normal high-nitrogen compound fertilizer; Apply 5 to 6 pieces of lobes (40 to 50 days after planting, that is, when the line is closed), and apply 30 to 35 kg of high-nitrogen and high-potassium compound fertilizer per acre; the third top dressing is carried out when the terminal leaves appear. At this time, the beginning of the crusting, that is, chasing the fat, 15 to 20 kg of high-potassium compound fertilizer per acre. In shallow water, the field should be fertilized in sunny and windless weather, avoiding noon in the hot sun, releasing water before fertilization, fertilizing in shallow water, and re-watering to restore the water layer 2 days after fertilization. In order to prevent the fertilizer from floating, it should be made into a fat mud group. This website: Suggestions on the scientific fertilization of lotus root by compound fertilizer Buckwheat Flours,Roasted Buckwheat Powder,Tartary Buckwheat Flour,Roasted Buckwheat Huantai Biotechnology Co., Ltd. , https://www.huantaifds.com
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