The lotus root absorbs more nitrogen in the early stage and relatively decreases in the later stage. The lotus root is a potassium-like crop with higher potassium absorption, and its potassium absorption is more in the late stage and less in the early stage. The lotus root absorbs phosphorus during the whole growth period. smooth.

The lotus root is an aquatic crop with few and shallow roots. It is eaten by enlarged underground rhizomes and is a crop that requires a lot of fertilizer. Under the condition of 1,800 kg of fresh lotus root per acre, lotus root absorbs about 7.7 kg of pure nitrogen, 3 kg of pure phosphorus, and 11.4 kg of pure potassium from the soil. The absorption ratio of pure nutrients of nitrogen, phosphorus and potassium by lotus root is roughly 1: 0.38: 1.5.

1. Fertilization formula: the ratio of special-release fertilizer for lotus root (nitrogen-phosphorus-potassium) can be selected from 18-18-18, 25-10-16, 24-10-15, etc., mixed with a certain amount of calcium, magnesium, zinc , Trace elements in boron, etc.

2. Fertilization time and method: transplant the lotus root after turning the ground. After turning the ground, do a one-time application of base fertilizer, then rake, and then transplant it into the 20-25 cm soil layer, and then transplant the lotus root, and there is no need to apply fertilizer afterwards.

3. Fertilizer dosage: the fertilizer dosage for the special controlled release fertilizer is about 35-40 kg per mu.

4. Matters needing attention: The effective zinc and effective boron content in the field of lotus root is generally lower than the critical value of fertilization for field crops. Therefore, the supplementary application of zinc fertilizer and boron fertilizer by lotus root cannot be ignored.

5. Effect of fertilization: The content of protein, reducing sugar and vitamin C is obviously increased, the length of root root is increased, the diameter of the root joint is enlarged, the weight is increased, and the yield is increased.