Low fruit setting rate and difficult fruit setting are the most prominent problems that plague summer vegetable production. Although many friends of vegetable farmers used to make adjustments, such as the establishment of fruit sprouts and booster ingredients, the problem of difficult fruit set-up was still not well resolved. What caused the difficulty in establishing summer vegetables?
First of all, it is the problem of flower bud differentiation. For example, the flower bud differentiation of the first spike flower begins when the tomato leaves 2 true leaves at the seedling stage. If the temperature exceeds 35°C during this period, the flower buds will be poorly differentiated or will not differentiate into flower buds, which will result in low fruit setting rate and difficulty in setting fruit even in the first ear fruit. After the colonization of tomatoes, it is difficult to solve the problem of difficult fruit setting by spraying the fruit setting agent or the booster after many times. Therefore, the solution to the problem of difficult fruit setting in summer vegetables is to solve the problem of nurturing strong seedlings first.
Cultivating strong seedlings plays an important role in enhancing plant resistance and increasing fruit setting rate. In summer, the temperature is high. In the nursery, shade nets should be used to cover the temperature and keep the temperature between 22-28°C to prevent the high temperature from inhibiting flower bud differentiation. And after two true leaves of seedlings can be sprayed 300 times the potassium dihydrogen phosphate solution mixed with 6000 times more love to adjust the growth of seedlings, seedlings to enhance the disease resistance. During the period, depending on the plant growth, it was decided whether or not foliar sprays were used to control plant length, so as to ensure normal flower bud differentiation during seedling stage.
Secondly, high temperature is the main factor that causes difficulty in fruit setting in summer vegetables. In the planting of summer vegetables, it is often seen at high temperatures above 35°C. The temperature is too high and the adhesion between pollen and stigma is reduced. At the same time, the pollen germination rate and pollen tube elongation rate are affected, which results in poor pollination and fertilization, and the fertilization process is disordered. As a result, a large number of flowers and fruit fall off and produce a large number of malformed fruits. Therefore, strengthening the cooling measures and controlling the greenhouse temperature within the range suitable for growing vegetables is a key measure to increase the fruit set rate of vegetables.
Again, excess nutrient overgrowth is another cause of difficult fruit set in summer vegetables. The temperature difference between day and night is small, the night temperature is high, and the soil moisture is high. Excessive use of nitrogen fertilizer causes the plants to have excessive vegetative growth and lack of reproductive growth. During production, they can avoid the above-mentioned problems by spraying 750 times. Zanthoxyl plus 30PPM naphthalene acetic acid control, promote vegetative growth to reproductive growth and transformation.
In addition, the lack of boron is also responsible for the difficulty of setting fruit in summer vegetables. Shouguang soil lack of boron, coupled with high temperature will inhibit the absorption of boron, if the boron fertilizer can not be supplemented, flower bud differentiation blocked, is not conducive to fruit set. Therefore, in the flowering and fruit setting period, application of 600 times of borax or 1200 times the speed of the music boron spraying supplement boron fertilizer, improve the fruit set rate of vegetables.
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