Vegetable stems and leaves are prosperous, how to control the hot weather

In the high temperature season, the metabolism of vegetables is accelerated. Once the environmental conditions are suitable, it is easy to have a vigorous growth, which is not conducive to the flowering and fruit setting in the later stage, and it will take some time for the vegetables to return to normal after the vigorous growth. Therefore, to control the prosperity of vegetables, it should start from the seedling stage. Specifically, it can be regulated from the following aspects:

One is the regulation of greenhouse temperature. In the high temperature season, the night temperature is too high, which is easy to cause the plants to grow vigorously. The effective way to reduce the night temperature is to reduce the heat storage of the wall and soil during the day, such as shading, irrigation, and interplanting creeping vegetables.

The second is moderate fat control. Vegetable farmers can delay the original watering time for 2 days, and at the same time pay attention to the amount of watering, and water it thoroughly to avoid flooding. In summer, the amount of evaporation is large, and when water is used to control prosperity, it is recommended to use small water frequently to avoid excessive water control and affect the normal growth of plants.

The third is to keep the fruit at the right time and prune the branches reasonably. Combined with the growth of the plants, the fruit should be kept early for the prosperous plants, and the fruit picking should be delayed appropriately to compete for the nutrients of the plants as much as possible and reduce the flow of nutrients to the plants. Conversely, when the plants are weak, they should be picked earlier. Prosperous plants should be properly pruned late.

The fourth is to choose the appropriate control agent to force the vigorous backflow of nutrients in the tip, and the inertial advantage of the tip is rapidly weakened to the capping situation. The main nutrition of its trunk is turned to the young fruit development system, which can improve the fruit expansion vigor, avoid the phenomenon of leaf hypertrophy, and improve the permeability of the field.

Fifth, the large and small water is alternately carried out. In summer, the temperature is high, and the amount of water evaporation is large. After two or three days of watering, the surface will dry out quickly. In addition to the high temperature, the plants are prone to wilting. At this time, vegetable farmers often immediately water and flush Fertilizer, water and fertilizer are sufficient, so that the stem and leaves of the plant grow vigorously, resulting in an imbalance of nutrition and reproductive growth. Then, watering in summer has the dual functions of replenishing water and cooling. If watering is too frequent, the amount of water is too large, and the soil humidity is too high, one is that the root system floats on the surface and does not stick down; the other is that the plant growth is unbalanced.

Therefore, it should be irrigated frequently with small water or alternately with large and small water. When the soil is dry, irrigation with large water intervals can ensure both root growth and cooling. Of course, when the shed temperature is too high, it should also be supplemented with artificial or micro-spraying for foliar watering, and the temperature of the shed should be lowered.

Sixth, reduce the use of nitrogen fertilizers. Plants grow too vegetatively, and there are often more nitrogen fertilizers in the soil. Vegetables can easily lead to vigorous growth after absorption. Therefore, in order to inhibit the vigorous growth of stems and leaves, vegetable farmers should pay attention to adjusting the proportion of fertilizers. When topdressing, they can choose potassium dihydrogen phosphate, suspended calcium, etc., and focus on supplementing potassium, calcium, phosphorus, etc., and can be used in conjunction with fertilizers containing amino acids. To promote nutrient absorption, coordinate plant growth, cultivate strong trees, and improve resistance.

The seventh is to increase the temperature difference between day and night. The high temperature at night will increase the respiration of vegetables, which will consume a large amount of organic nutrients, thereby reducing the part transported from the fruit, which will slow down the expansion of the fruit. Therefore, it is very important to reduce night temperature in summer. Specifically, it can be carried out from the aspects of reducing the shed temperature during the day and reducing the heat storage of the shed.