Reasonable fertilization has a great impact on the quality and yield of watermelon. The following four problems should be concerned.
1. It is necessary to adjust and meet the balance requirements of nitrogen, phosphorus and potassium in different growth and development periods in a timely manner: the proportions of nitrogen, phosphorus and potassium absorbed during different growth and development periods vary greatly. In the early stage of the whole growth period, more nitrogen, potassium and phosphorus were needed; in the middle and later stages, there were more nitrogen and potassium. Therefore, in the early stage of watermelon growth, nitrogen supply is ensured, and appropriate phosphorus and potassium are added to promote the vegetative growth of the plants. It is important to ensure the nitrogen and potassium nutrients after sitting on the melon to improve the yield and quality of the watermelon.
2, should pay attention to the application of organic fertilizer: organic fertilizer not only provides a reliable basis for the supply of nutrients during the whole growth period of watermelon, but also provides the most comprehensive nutrient. This is one of the main measures for the high yield and quality of watermelon.
3, to seize the four fertilization links: 1 to apply the base fertilizer. The farmer's fertilizer is 2000-5000kg, and it is combined with Meisheng “16-16-16â€, “18-12-18â€, “18-12-20†and other potassium sulfate fertilizers 30~50kg/mu. Or apply 15 to 20 cm of ditching according to the seeding line and cover the soil. 2 steady catching seedlings, vines. Depending on the growth of the plant, when the seedlings grow 2 to 3 true leaves, the nitrogen fertilizer (N) is 8 to 10 g per 15 cm from the seedling; the initial application of the vine is 30 to 40 kg, and the decomposed cake is 100 kg. It can be applied in a 15cm ditch in the opposite direction of the vine. 3 heavy chasing and expanding melon fertilizer. 6 to 7 days after sitting on the melon (fading period), timely application of the expanded melon fertilizer, and the use of "18-12-20", "16-12-20" and other potassium sulfate type Meisheng fertilizer 40 ~ 50kg. Apply when it is raining or combined with watering. 4 combined with foliar fertilization. For example, 0.2% KH2PO4, 0.2% borax, and 0.5% urea are sprayed during the pumping period and the flowering period; the watermelon is sprayed at the beginning of the flowering period; the titanium fertilizer is sprayed during the seedling and vine season.
4. Potassium sulphate type fertilizer should be used: Practice has shown that the application of chlorine-containing or sulphur-containing fertilizer has no obvious effect on the yield of watermelon, but it has a great relationship with the quality of watermelon. Potassium sulphate-type fertilizer is conducive to the improvement of quality, while the quality of watermelon with chlorine-based fertilizer is obviously worse, "sandness" is gone, "Crisp" becomes "meat", "crunchy" becomes "dead", and even melon Fiber appears in the middle. The application of sulfur-based fertilizers and the selection of loamy or sandy loam soils, and the full implementation of the above four fertilization links are essential for the production of high-quality watermelons.
Excerpt from: Hebei Farmers Daily
1. It is necessary to adjust and meet the balance requirements of nitrogen, phosphorus and potassium in different growth and development periods in a timely manner: the proportions of nitrogen, phosphorus and potassium absorbed during different growth and development periods vary greatly. In the early stage of the whole growth period, more nitrogen, potassium and phosphorus were needed; in the middle and later stages, there were more nitrogen and potassium. Therefore, in the early stage of watermelon growth, nitrogen supply is ensured, and appropriate phosphorus and potassium are added to promote the vegetative growth of the plants. It is important to ensure the nitrogen and potassium nutrients after sitting on the melon to improve the yield and quality of the watermelon.
2, should pay attention to the application of organic fertilizer: organic fertilizer not only provides a reliable basis for the supply of nutrients during the whole growth period of watermelon, but also provides the most comprehensive nutrient. This is one of the main measures for the high yield and quality of watermelon.
3, to seize the four fertilization links: 1 to apply the base fertilizer. The farmer's fertilizer is 2000-5000kg, and it is combined with Meisheng “16-16-16â€, “18-12-18â€, “18-12-20†and other potassium sulfate fertilizers 30~50kg/mu. Or apply 15 to 20 cm of ditching according to the seeding line and cover the soil. 2 steady catching seedlings, vines. Depending on the growth of the plant, when the seedlings grow 2 to 3 true leaves, the nitrogen fertilizer (N) is 8 to 10 g per 15 cm from the seedling; the initial application of the vine is 30 to 40 kg, and the decomposed cake is 100 kg. It can be applied in a 15cm ditch in the opposite direction of the vine. 3 heavy chasing and expanding melon fertilizer. 6 to 7 days after sitting on the melon (fading period), timely application of the expanded melon fertilizer, and the use of "18-12-20", "16-12-20" and other potassium sulfate type Meisheng fertilizer 40 ~ 50kg. Apply when it is raining or combined with watering. 4 combined with foliar fertilization. For example, 0.2% KH2PO4, 0.2% borax, and 0.5% urea are sprayed during the pumping period and the flowering period; the watermelon is sprayed at the beginning of the flowering period; the titanium fertilizer is sprayed during the seedling and vine season.
4. Potassium sulphate type fertilizer should be used: Practice has shown that the application of chlorine-containing or sulphur-containing fertilizer has no obvious effect on the yield of watermelon, but it has a great relationship with the quality of watermelon. Potassium sulphate-type fertilizer is conducive to the improvement of quality, while the quality of watermelon with chlorine-based fertilizer is obviously worse, "sandness" is gone, "Crisp" becomes "meat", "crunchy" becomes "dead", and even melon Fiber appears in the middle. The application of sulfur-based fertilizers and the selection of loamy or sandy loam soils, and the full implementation of the above four fertilization links are essential for the production of high-quality watermelons.
Excerpt from: Hebei Farmers Daily
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