The performance of tomato umbilical rot is in the period of expansion of the solana oleifera. Because the umbilical part of the fruit is downward, some parts of the sun are not browned, some are dry and some are rot, which has a great influence on the yield. Improper fertilization has a clear relationship with the occurrence of umbilical rot.
Judging from the current status of fertilization, there is a widespread or no application of organic fertilizer in tomato production, but the application of chemical fertilizers to increase production bias, while in the application of chemical fertilizers, there are partial application of heavy nitrogen fertilizer and less application of phosphorus and potassium fertilizer. In addition, there is a lack of nutrient imbalance in calcium and other trace elements. These unbalanced fertilization problems are the external causes of the frequent occurrence of tomato umbilical rot in recent years.
When thinking about how to adjust fertilization to prevent the incidence of umbilical rot, first of all, from the nutritional characteristics of tomato: First, the tomato yield is high, the amount of fertilizer is large, and it belongs to the infinite growth type. The tomato harvesting period is long, with With the continuous collection of nutrients, it is necessary to supplement the nutrients while harvesting, in order to meet the needs of continuous flowering results. Second, the demand for potassium, calcium and magnesium in tomatoes is relatively large, especially in the period of fruit enlargement. If there is a lack of calcium, umbilical rot is easy to occur. The order of the absorption of these main nutrient elements in tomato is potassium>calcium>nitrogen>phosphorus>magnesium. Because tomatoes have the above nutritional needs, the following points should be noted in fertilization:
1, pay attention to seedbed fertilization to achieve "fetal rich", it is best to apply organic fertilizer plus chemical fertilizer. The application of chemical fertilizers should be controlled by the proportion of nitrogen fertilizers applied, especially the phosphate fertilizers should be selected from ordinary calcium or calcium magnesium phosphate.
2, deep application of base fertilizer, organic fertilizer combined with inorganic fertilizer, without the application of organic fertilizer, fertilizer varieties do not necessarily choose high-concentration compound fertilizer, not necessarily high tower granulation high-nitrogen compound fertilizer, but to choose elemental nitrogen fertilizer Gap calcium phosphate fertilizer, potassium fertilizer can be used potassium sulfate or potassium chloride. Phosphate fertilizers in acid soil areas are preferred for calcium, magnesium and phosphorus fertilizers.
3, the main fertilizer application of nitrogen and potassium fertilizer, pay attention to the combination of fertilizer and water, the number of top dressing points are divided into the first fruit expansion period of the fruit fertilizer; the second and third ear fruit expansion period of strong fruit fertilizer. Follow up 3-4 times.
4. After entering the fruit-bearing period, the weakening ability of the root system is reduced. The method of root-spraying can be used to spray the aqueous solution of potassium dihydrogen phosphate, calcium nitrate, borax and urea, which is beneficial to the strong growth of the late stage. Reduce the incidence of umbilical rot.
Author: Cao Yiping
Source: "Agricultural Resources Guide"
Judging from the current status of fertilization, there is a widespread or no application of organic fertilizer in tomato production, but the application of chemical fertilizers to increase production bias, while in the application of chemical fertilizers, there are partial application of heavy nitrogen fertilizer and less application of phosphorus and potassium fertilizer. In addition, there is a lack of nutrient imbalance in calcium and other trace elements. These unbalanced fertilization problems are the external causes of the frequent occurrence of tomato umbilical rot in recent years.
When thinking about how to adjust fertilization to prevent the incidence of umbilical rot, first of all, from the nutritional characteristics of tomato: First, the tomato yield is high, the amount of fertilizer is large, and it belongs to the infinite growth type. The tomato harvesting period is long, with With the continuous collection of nutrients, it is necessary to supplement the nutrients while harvesting, in order to meet the needs of continuous flowering results. Second, the demand for potassium, calcium and magnesium in tomatoes is relatively large, especially in the period of fruit enlargement. If there is a lack of calcium, umbilical rot is easy to occur. The order of the absorption of these main nutrient elements in tomato is potassium>calcium>nitrogen>phosphorus>magnesium. Because tomatoes have the above nutritional needs, the following points should be noted in fertilization:
1, pay attention to seedbed fertilization to achieve "fetal rich", it is best to apply organic fertilizer plus chemical fertilizer. The application of chemical fertilizers should be controlled by the proportion of nitrogen fertilizers applied, especially the phosphate fertilizers should be selected from ordinary calcium or calcium magnesium phosphate.
2, deep application of base fertilizer, organic fertilizer combined with inorganic fertilizer, without the application of organic fertilizer, fertilizer varieties do not necessarily choose high-concentration compound fertilizer, not necessarily high tower granulation high-nitrogen compound fertilizer, but to choose elemental nitrogen fertilizer Gap calcium phosphate fertilizer, potassium fertilizer can be used potassium sulfate or potassium chloride. Phosphate fertilizers in acid soil areas are preferred for calcium, magnesium and phosphorus fertilizers.
3, the main fertilizer application of nitrogen and potassium fertilizer, pay attention to the combination of fertilizer and water, the number of top dressing points are divided into the first fruit expansion period of the fruit fertilizer; the second and third ear fruit expansion period of strong fruit fertilizer. Follow up 3-4 times.
4. After entering the fruit-bearing period, the weakening ability of the root system is reduced. The method of root-spraying can be used to spray the aqueous solution of potassium dihydrogen phosphate, calcium nitrate, borax and urea, which is beneficial to the strong growth of the late stage. Reduce the incidence of umbilical rot.
Author: Cao Yiping
Source: "Agricultural Resources Guide"
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