In the spring, the highest temperature in the outside world has risen above 15 °C. When the weather is fine, the temperature in the shed is kept high and the plants grow very rapidly. The peppers in the shed are uneven, and the growth of the plants is quite different. One third of the trees in the row are taller than the other plants by more than 20 centimeters, and there is a clear trend. There are also some trees because the fruit is early, the roots are weak, and the plants are short. In the spring, such problems occur in the greenhouses of many vegetable farmers. The reason why it is prosperous is that the weather is fine in recent times, and the temperature in the shed has been kept high. On the other hand, this period is the period of the pepper fruit expansion, the water and fertilizer supply is sufficient, when the fruit is less or the fruit After the removal of the seeds, the burden on the plants is suddenly reduced, and the nutrients are supplied in large quantities to grow stems and leaves, resulting in internode elongation and large and green leaves. The plants with severe growth and long-term growth are greatly affected by flowering and fruit setting, and they are easy to fall into a vicious circle. And those low-lying plants, because of the high occlusion and soil nutrient competition, the lack of nutrient supply, the growth is always slow, it is difficult to make the plant growth in the shed. Plant growth is uneven, which has a great impact on overall yield. Therefore, as the temperature rises, more attention should be paid to controlling the uneven growth of vegetables. First of all, the prosperous tree should be controlled by drugs alone. Vegetable growers can use 500 times as much as the helper or 200 times more than love, and spray the top of the plant with a small watering can to suppress the growth of the plant. If the plant is severely flowered, it can be sprayed with 6000 times of 2% naphthaleneacetic acid. It should be noted that it is best to use a small watering can to point to avoid the large amount of chemicals falling on other plants. Second, adjust the plant fruit set. For plants with a prosperous trend, it is necessary to retain more fruits to ensure the balance between reproductive growth and vegetative growth. For low-lying plants, try to keep less fruits and promote their vegetative growth. Once again, increase the time of seeing light and increase the temperature difference between day and night. In the afternoon, it is necessary to delay the shed, increase the illumination in the shed, and increase the temperature difference between day and night, reduce the consumption of organic matter at night, and avoid excessive growth of plants. The daytime temperature is controlled at around 25 °C and drops to 13 °C during the night. The supply of water and fertilizer should be appropriate. It is not possible to increase the amount of water and fertilizer for the purpose of expanding the fruit, so as to ensure that the nutrients in the soil are sufficient to expand the fruit. In addition, the field is closed, and the ventilation and light transmission are poor. It is also a factor that causes prosperity. Therefore, it is necessary to strengthen the pruning, remove the excess side branches and old diseased leaves, especially the inner lychee, and improve the ventilation and light transmission conditions. Prosperous.
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