How to fertilize watermelon in greenhouse

In July, the high temperature and strong photosynthesis of the plants are the strong growth stage of the second cropping melon. The top dressing should be timely and promote fruit growth. Generally Mu chase ammonium bicarbonate 30 to 50 kg, potassium sulfate 25 kg, mix with 50 to 75 kg of mature oil residue, 25 to 30 cm away from the plant at the ridge, depth 12 to 15 cm, diameter about 10 cm Open a hole or apply it between two trees near the ditch. At the same time, a 0.2% to 0.3% potassium dihydrogen phosphate solution was sprayed once every 7 days to promote sugar transformation and prevent premature aging of the vine.

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