Watermelon is sensitive to soil acidity. When the soil pH is lower than 5.5, organic fertilizer or lime should be applied to improve or plant acid-resistant watermelon varieties. The watermelons in the open land of our province have started to grow and transplant, and pay attention to the improvement of soil, which can improve economic benefits.
The first is to disinfect the soil. 3 to 5 grams of carbendazim per square meter or 100 kilograms of quicklime for disinfection (the above two methods are ploughed after sprinkling, so that the soil is mixed, and the quicklime cannot be used for years). Fields with more insect pests can be used to place nests with soil insecticides, or insecticides can be applied throughout the field.
The second is to re-apply the base fertilizer. The formula for the base fertilizer is: 3000 kg of farmyard manure, 100 kg of phosphate fertilizer, 40 kg of potassium sulfate, or 3000 kg of chicken and duck manure (used after fermentation of fresh manure), 50 kg of phosphate fertilizer and 30 kg of potassium sulfate.
The third is the field. Mix the fertilizer evenly into the soil and open the compartment (groove) at 2.5 to 3.5 meters. If the intercropping is carried out, the melon road stays 1.3 meters, and the remaining 1.3 meters of other vegetables, the amount of watermelon melon road bottom fertilizer is halved. If there is no potassium sulfate fertilizer, 10 kg of potassium dihydrogen phosphate can be used per mu, and the effect is better. The melon road with good fertilization should be evenly fined before planting, and the tank should be well 20 cm deep. Do the ditch (the ditch should be 30 cm, and the rain should be stopped and the ditch can be dry).
The fourth is to use herbicide weeding. The area of ​​watermelon fields is large, and manual weeding is very troublesome. Tests have shown that the soil spray is closed before the film is coated, and the following herbicides are better: trifluralin, dur (for gramineae, purslane), diltiazem (for fragrant aconite), dichlorfen (for fo Bachelor and sedge).
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