The principle of watermelon topdressing: light application of seedling fertilizer, skillful application of rattan fertilizer, heavy application of melon fertilizer.
The root distribution of watermelon seedlings is small, and it is difficult to absorb and utilize the deep base fertilizer. It should be supplemented with quick-acting fertilizer to promote growth. In the true leaf stage of watermelon 4~5, open shallow ditch at 10 cm on one side of the seedling, apply 5 kg of urea per acre, and water the groove after sealing. Seedling stage topdressing should not be too much, too close to the roots, so as not to damage the roots and form a dead seedling.
After the watermelon is out of the vine and the vine is spread, the growth rate is accelerated, and the demand for nutrients is increased. In this period, the top dressing can promote the growth of the vine. Each plant applies 10~15 grams of urea, 30 grams of superphosphate, and 15 grams of potassium sulfate. The fertilizer and soil are mixed and applied. After fertilization, the soil is sealed and soiled, and the water is absorbed to promote the absorption of fertilizer. This fertilization can not only promote the growth of watermelon stems and leaves, but also solve the nutritional needs of the melons, which is beneficial to maintain the growth of the plants and prolong the melon period.
The cassava fertilizer is the key to watermelon topdressing. When the melon has large eggs, 2~3 kg of urea per acre and 5~7.5 kg of potassium sulphate; when the melon has a large bowl, 5~7 kg of urea per acre is used. Calcium phosphate is 3 to 4 kg and potassium sulfate is 4 to 5 kg. Due to the reduced absorption capacity of watermelon roots, it can be combined with disease prevention and pest control, and 0.3% potassium dihydrogen phosphate is used for top dressing.
Huaxian Liu Huimin
The root distribution of watermelon seedlings is small, and it is difficult to absorb and utilize the deep base fertilizer. It should be supplemented with quick-acting fertilizer to promote growth. In the true leaf stage of watermelon 4~5, open shallow ditch at 10 cm on one side of the seedling, apply 5 kg of urea per acre, and water the groove after sealing. Seedling stage topdressing should not be too much, too close to the roots, so as not to damage the roots and form a dead seedling.
After the watermelon is out of the vine and the vine is spread, the growth rate is accelerated, and the demand for nutrients is increased. In this period, the top dressing can promote the growth of the vine. Each plant applies 10~15 grams of urea, 30 grams of superphosphate, and 15 grams of potassium sulfate. The fertilizer and soil are mixed and applied. After fertilization, the soil is sealed and soiled, and the water is absorbed to promote the absorption of fertilizer. This fertilization can not only promote the growth of watermelon stems and leaves, but also solve the nutritional needs of the melons, which is beneficial to maintain the growth of the plants and prolong the melon period.
The cassava fertilizer is the key to watermelon topdressing. When the melon has large eggs, 2~3 kg of urea per acre and 5~7.5 kg of potassium sulphate; when the melon has a large bowl, 5~7 kg of urea per acre is used. Calcium phosphate is 3 to 4 kg and potassium sulfate is 4 to 5 kg. Due to the reduced absorption capacity of watermelon roots, it can be combined with disease prevention and pest control, and 0.3% potassium dihydrogen phosphate is used for top dressing.
Huaxian Liu Huimin
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