In recent years, vegetable farmers often encounter the problem of falling flowers and fruit, low fruit setting rate and increased number of deformed fruits in the production of citrus fruits and legumes, which seriously affect the yield and quality of vegetables. Recently, many reporters in the interview have asked about the problems in this area. I hope that I can find out the reasons as soon as possible and come up with effective countermeasures. Here, we analyze the summer climate and think that there are five reasons for the fall and fall of the vegetables in summer:
First of all, high temperature in summer is the main culprit in causing vegetable figs. In the summer vegetable greenhouse cultivation, high temperatures above 32 °C are common. Excessive temperature can seriously affect the flower bud differentiation of vegetables. The excessive temperature makes the adhesion of pollen and stigma lower, and affects the germination rate of pollen and the elongation rate of pollen tube, which makes the pollination fertilization poor and the fertilization process disorder. The flower fruit is shed a lot and produces a lot of deformed fruit. Therefore, in the summer greenhouse, cover the shade net or splash the mud to cool down, and strengthen the shed to ventilate around the night and night without rain.
Secondly, the summer air is dry, and the suitable air humidity is also very important for normal fertilization. Generally, the air humidity suitable for flower bud differentiation is 70%-80%. Especially in the flowering and fruiting period, spray the water with the sprayer to increase the air humidity.
The lack of boron and phosphorus will affect flower bud differentiation. Boron and phosphorus play an important role in promoting flower bud differentiation and increasing fruit set rate. In the flowering and fruit setting period, borax and potassium dihydrogen phosphate solution can be sprayed on the foliage. Potassium fertilizer should be added during the peak season of summer vegetables to enhance plant resistance, improve pollination performance and improve fruit quality.
It is also crucial to cultivate age-appropriate seedlings to enhance plant resistance and increase fruit set rate. The flower bud differentiation at seedling stage directly determines the fruit setting rate of one to two pomegranate after planting. Vegetables that are now in the nursery period should be covered with sunshade nets and insect nets to reduce the temperature of the seedbed. In the middle and late stages, potassium dihydrogen phosphate solution can be sprayed on the leaves. The summer temperature is high, the temperature difference between day and night is small, the seedlings are easy to grow, and depending on the growth of the plant, it can be sprayed with the help of Zhuangsu and Zhuangsu. Under the influence of high temperature and long daylight after planting, the growth point is also prone to produce a large amount of endogenous gibberellin, which makes the internodes too long, the vegetative growth is too strong, and the reproductive growth is weakened, resulting in falling flowers and fruits.
Excessive application of nitrogen fertilizer, phosphorus and potassium fertilizer is also easy to cause falling flowers and fruit. The summer vegetables are easy to grow, and the nitrogen fertilizer should be applied in the early stage. In the later stage, the application rate of nitrogen fertilizer should be controlled and phosphorus and potassium fertilizer should be added.
It is only necessary to take effective measures to solve the problem of the summer vegetables falling and falling. The vegetable farmers can sum up the planting experience from the production, find out the law and seize the opportunity to prevent it early, and improve the quality and yield of the summer vegetables.
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