Partial application of nitrogen in watermelon caused melon unsweetened
2020-03-04 13:09:48
In recent years, the issue of the annual supply of watermelon has been basically solved, but there has been a problem, that is, although some watermelons look good but not sweet, and some watermelons are only central sweet, not sweet around. Why is this? The main reason for this is the fact that the chemical fertilizers are applied to Guatemala, especially nitrogen fertilizers, and the balance between a large number of elements and trace elements in the watermelon plant is destroyed, which limits the synthesis of sugar.
The sweetness of watermelon is affected by many factors. One is the difference in the sugar content of the varieties themselves, and the other is the influence of climate, cultivation measures, fertilization types, and fertilization methods. However, the sweetness of watermelons in recent years is not high, which is due to the excessive application of too much nitrogen and too late. Nitrogen fertilizer is extremely important for the growth and development of crops. However, nitrogen fertilizers are generally inorganic fertilizers, and watermelons must convert the absorbed inorganic nitrogen into organic nitrogen before they can be absorbed and utilized. In the conversion process, a large amount of carbon is needed. In the absence of carbon, that is, lack of organic substances in the melon land, perhaps the seedlings are in good condition, the fruits are large, the yield is high, and they look good, but the sugar content is low, not sweet and free from consumers. welcome.
In addition, the sweetness and the unsweetness of watermelon are also due to whether there is sufficient supply of phosphorus and potassium nutrients in the soil during the later stage of watermelon growth. This is because the synthesis, transformation and transportation of sugar in plants all have a close relationship with phosphorus and potassium. Especially in the reproductive growth stage, photosynthetic synthetic carbohydrates, with the participation of phosphorus and potassium, are transported to fruits, seeds and other organs and become stored substances. The sugar in watermelon is this kind of storage material. Therefore, during the growth process of watermelon, especially in the later period, no matter whether chemical fertilizers or organic fertilizers are used, as long as nitrogen, phosphorus and potassium are used together properly, the rational use of fertilizers will increase the sugar content of watermelons and it will be sweet when eaten. Therefore, in order to achieve high yields, some melon farmers do not use large amounts of nitrogen fertilizer.
Therefore, the cultivation of watermelons requires the use of comprehensive cultivation measures. To increase the sugar content, it is best to use decomposed human excrement, manure, soil miscellaneous fertilizer or straw return to increase the content of organic matter and carbon in the soil and keep the ratio of carbon and nitrogen in the soil scientific, reasonable and balanced. To maintain a reasonable mix of nitrogen, phosphorus, and potassium, here is a fertilization recipe: composted manure for every 667 m2 of melon, 1500 kg of chicken manure, or 3,000 kg of earth-mixed fertilizer, mixed with nitrogen, phosphorus, and potassium ternary compounds. Fertilizer 25 kilograms, urea 5 kilograms, 50 milligrams of the cake-fermented cake fertilizer at the seedling stage, 15 to 20 kilograms of potassium sulfate compound fertilizer applied during fruit setting.
Scientific and reasonable fertilization can not only promote rapid growth of melon seedlings early, early flowering results, but also can stabilize the growth of the medium-term, fruit-setting late will not defer from premature aging. Phosphorus and potassium are beneficial to the accumulation of sugar and increase the sugar content, so as to achieve both high yield and high quality. The watermelon that is produced has a great sweetness and can greatly increase the economic benefits.
The sweetness of watermelon is affected by many factors. One is the difference in the sugar content of the varieties themselves, and the other is the influence of climate, cultivation measures, fertilization types, and fertilization methods. However, the sweetness of watermelons in recent years is not high, which is due to the excessive application of too much nitrogen and too late. Nitrogen fertilizer is extremely important for the growth and development of crops. However, nitrogen fertilizers are generally inorganic fertilizers, and watermelons must convert the absorbed inorganic nitrogen into organic nitrogen before they can be absorbed and utilized. In the conversion process, a large amount of carbon is needed. In the absence of carbon, that is, lack of organic substances in the melon land, perhaps the seedlings are in good condition, the fruits are large, the yield is high, and they look good, but the sugar content is low, not sweet and free from consumers. welcome.
In addition, the sweetness and the unsweetness of watermelon are also due to whether there is sufficient supply of phosphorus and potassium nutrients in the soil during the later stage of watermelon growth. This is because the synthesis, transformation and transportation of sugar in plants all have a close relationship with phosphorus and potassium. Especially in the reproductive growth stage, photosynthetic synthetic carbohydrates, with the participation of phosphorus and potassium, are transported to fruits, seeds and other organs and become stored substances. The sugar in watermelon is this kind of storage material. Therefore, during the growth process of watermelon, especially in the later period, no matter whether chemical fertilizers or organic fertilizers are used, as long as nitrogen, phosphorus and potassium are used together properly, the rational use of fertilizers will increase the sugar content of watermelons and it will be sweet when eaten. Therefore, in order to achieve high yields, some melon farmers do not use large amounts of nitrogen fertilizer.
Therefore, the cultivation of watermelons requires the use of comprehensive cultivation measures. To increase the sugar content, it is best to use decomposed human excrement, manure, soil miscellaneous fertilizer or straw return to increase the content of organic matter and carbon in the soil and keep the ratio of carbon and nitrogen in the soil scientific, reasonable and balanced. To maintain a reasonable mix of nitrogen, phosphorus, and potassium, here is a fertilization recipe: composted manure for every 667 m2 of melon, 1500 kg of chicken manure, or 3,000 kg of earth-mixed fertilizer, mixed with nitrogen, phosphorus, and potassium ternary compounds. Fertilizer 25 kilograms, urea 5 kilograms, 50 milligrams of the cake-fermented cake fertilizer at the seedling stage, 15 to 20 kilograms of potassium sulfate compound fertilizer applied during fruit setting.
Scientific and reasonable fertilization can not only promote rapid growth of melon seedlings early, early flowering results, but also can stabilize the growth of the medium-term, fruit-setting late will not defer from premature aging. Phosphorus and potassium are beneficial to the accumulation of sugar and increase the sugar content, so as to achieve both high yield and high quality. The watermelon that is produced has a great sweetness and can greatly increase the economic benefits.
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