First, high temperature This is the culprit that caused the tomatoes to fall. In the cultivation of summer vegetables, the high temperature of around 32°C often exists. High temperatures severely affect the fruit setting rate of vegetables. The high temperature makes the adhesion of pollen and stigma lower, and seriously affects the pollen germination rate and pollen tube elongation rate, making pollination fertilization poor, resulting in a large number of fruit and fruit off and produce a large number of malformed fruit. In the high temperature at noon to strengthen the ventilation, and use shade net cover. Second, another point, the summer air drying The appropriate air humidity is also very important for normal fertilization. Generally, the air humidity for flower bud differentiation is 70~80%. Especially during the fruitful period of flowering and fruit setting, keep the ground dry and wet. Sprayer can be sprayed with fresh water to increase air humidity. Third, the lack of certain nutrients Boron and phosphorus play an important role in promoting flower bud differentiation and improving fruit set. In flowering and fruit setting period, borax and potassium dihydrogen phosphate solution can be sprayed on the leaves. During the fruitful period, calcium fertilizer should be added to enhance plant resistance, improve pollination performance, improve fruit quality, and prevent physiological diseases such as umbilical rot, sun scorch, and bud blight causing fruit drop and fruit drop. For the above reasons, the following prevention measures are specifically proposed: It is also critical to cultivate age-appropriate seedlings to enhance plant resistance and increase fruit set. The flower bud differentiation at the seedling stage directly determines the fruit setting rate of the first to the second pod after planting. The vegetables that are currently in the nursery period should be covered with shade nets and insect nets to reduce the seedbed temperature. In the middle and later stages, potassium dihydrogen phosphate solution can be sprayed on the leaves. In summer, the temperature is high, the temperature difference between day and night is small, the seedlings are easy to grow, and the control of plant growth can be timely sprayed with booster and chlormequat. After the planting of vegetables under the influence of high temperature, long days, the growth point is also easy to produce a large number of endogenous gibberellin, so that the internodes are too long, nutrient growth is too prosperous, reproductive growth weakened, resulting in falling flowers and fruit. Excessive application of nitrogen fertilizer, phosphorus and potassium fertilizers are also likely to cause flower drop. The summer vegetables are easy to be long, and the early stage nitrogen fertilizer should be used in a proper way. The result should be to control the amount of nitrogen fertilizer and increase the application of phosphorus and potassium fertilizer. Through the analysis of this article and the exploration in practice, I hope to gain more experience, increase the yield and quality of vegetables, and thus increase economic efficiency.
