Recently, a number of vegetable farmers have reported that the autumn delay of the kind of tomatoes has just turned red and they have been cracked. The basics of invariable redness are not cracked. For some reason, how can we prevent it? Tomato cracking is a physiological disease, and there are several main reasons for its formation:
1. Cracking caused by improper selection of varieties. In general, large fruit with thin skin and round fruit is prone to cracking. In production, it is possible to choose a variety with thick pericarp, medium and small fruit, and tolerance to storage and transportation.
2. Cracking caused by improper fertilization. In the fruit development period, a large amount of potash fertilizer is needed, and at the same time, the demand for nitrogen fertilizer is reduced. At this time, if a large amount of nitrogen fertilizer is applied and the amount of potassium fertilizer is neglected, the lack of potassium in fruit will affect the absorption of calcium and boron. One of the main causes of fruit cracking in tomatoes is the lack of calcium. Therefore, in order to prevent the imbalance of element supply in the fruit growth period, the application amount of nitrogen fertilizer should be properly controlled, and potassium fertilizer should be appropriately added to meet the nutrients required for fruit growth and development. In general, potassium fertilizer can be applied twice as much as nitrogen fertilizer. Boron deficiency is also a cause of fruit cracking in tomatoes. It can be used to supplement boron by spraying 0.5% borax solution during flowering period to prevent cracking of tomatoes due to lack of boron. Spray once every 7-10 days and spray 2-3 times. .
3. Severe changes in soil moisture cause cracking. Some vegetable farmers in the early period of tomato growth in order to prevent plant length control measures to take water, but after entering the outcome period and the use of fertilizer and water storm measures to promote fruit development, in this fertilizer and water conditions, tomato pulp growth speed, relative skin growth Slow speed can also cause cracks. To prevent this type of cracking, we must start by strengthening the water management in the shed. This requires vegetable farmers to start paying attention before the flowering, pay attention to the soil in the shed, see the dry watering, and when the fruits are inflated, they must keep the ground. Wet, can not flood irrigation, prevent the accumulation of water in the field, try to avoid drastic changes in dry soil moisture, can take "small water ground irrigation" approach, a small number of times to provide the necessary water for tomato growth, reduce the rate of cracking.
4. Cause cracking due to improper manual operation. In the daily production and cultivation management of vegetables, vegetable growers excessively dredge the leaves in order to increase the ventilation and transparence in the greenhouse and increase the degree of fruit coloring. The vegetable farmer leaves only the top few leaves, the lower leaves are completely removed, the functional leaves are insufficient, and the photosynthate produced is insufficient. The fruit is not adequately nutritious and shows fruit cracking. In response, farmers were reminded that all leaves without pests and diseases and without macula could not be destroyed prematurely, because these leaves are still the main force for photosynthesis. In addition, excessive fruit retention can also lead to fruit cracking. In general, 4 fruits per panicle can be left, but many growers in order to increase yield, 5-6 fruits per panicle, leaving too many fruits, fruit due to lack of adequate nutrition and cracking. Therefore, vegetable growers are more greedy when they stay.
5. The use of drugs caused irrational cracking. Some vegetable farmers have to increase their drug concentration at random, and excessive use of drugs will affect the growth rate of the peel and cause cracking. Some time ago, tomatoes were difficult to set up and the vegetable farmers increased the concentration of anthers. The use of hormones increased, causing tomatoes to crack. Therefore, vegetable farmers must first experiment before using anthers, and then apply them in large areas. In addition, when the temperature is too high during spraying, the liquid solution volatilizes quickly, resulting in a rapid increase in the concentration of the liquid remaining on the fruit surface. Under the stimulus of the medicine, the peel is also prone to cracks and cracks. Therefore, do not arbitrarily increase the drug concentration when dispensing in production.
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