Fertilization method of watermelon

Production of 1000 kg of watermelon fruit need fertilizer as follows: nitrogen (N) 2.5 to 3.3 kg, phosphorus (P2O5) 0.8 to 1.3 kg, potassium (K2O) 2.9 to 3.7 kg.

There are obvious differences in the amount of nutrients absorbed in different reproductive stages, in the germination period, the amount of nitrogen, phosphorus and potassium absorbed is only 0.01% of the total amount absorbed; in the seedling stage, from the appearance of true leaves to the whole plant is a disk plant (group of trees), the amount of nitrogen, phosphorus and potassium absorbed is only 0.54% of the total amount absorbed; in the vine stage, the amount of nitrogen, phosphorus and potassium absorbed accounts for 14.6% of the total amount absorbed; the fruiting stage is a period of vigorous nutrient absorption of watermelon, nitrogen, phosphorus and potassium Nitrogen, phosphorus, potassium absorption accounted for 84.88% of the total absorption, the plant from containing more nitrogen and phosphorus to potassium. This shows the importance of nutrition in the late stage of watermelon.

Base fertilizer should be sufficient, with organic fertilizer, fertilizer in accordance with the principle of appropriate, heavy application, heavy application of expansion fertilizer.

Watermelon fertilization techniques (due to regional, land power, fertilization habits vary, the following fertilization techniques are for reference only, please adjust according to the actual local situation)

General fertilization method

Base fertilizer: apply 50-60 kg of high concentration compound fertilizer (15-15-15, 16-8-16, etc.) of Kefeng potassium sulfate.

Follow-up fertilizer: Apply 20~25 kg of Kefeng high potassium compound fertilizer (15-10-20) during the fruit expansion period.

Long-acting slow-release fertilizer fertilization method

Before sowing, mu apply 16~8~18 mu of long-acting slow-release fertilizer 50~70 kg as base fertilizer.