At present, the temperature is gradually increasing and the growth of vegetable plants in greenhouses is gradually increasing. Care should be taken to prevent plant growth. Specifically, the following four points should be made:
First, control the night temperature
In spring, the temperature rises quickly. If the air outlet is closed prematurely and the grass cover is covered prematurely, it is easy to make the night temperature higher, the respiratory consumption consumes too much nutrients, and the vegetables are prolonged. Therefore, we should adjust the ventilation and shelf time according to the insulation conditions of the greenhouse and the types of vegetables grown. In sunny weather, the temperature of the shed can be reduced to about 18°C ​​and the air outlet can be set at about 16°C. The night temperature of the sweet pepper was controlled at 15°C-17°C, and the cucumber was controlled at 13°C-15°C. In fine weather, we can put a few grasshoppers in a few places. We can use a roller blind machine to put it on several occasions, first placing it on half of the shed.
Second, rational watering and fertilizing
After the spring temperature rises, the growth of vegetables is accelerated. In order to meet the needs of plant growth, many vegetable farmers have increased the amount of water applied to the plants, causing the plants to grow in a leggy manner. Therefore, in order to prevent crop plants from appearing leggy, it must be properly watered and fertilized, and should be based on the growing condition of the plants and the fruit setting situation. For example, the spring cucumber can not be fertilized before setting up the fruit, and no water can be used to cultivate the strong tree.
Third, timely and appropriate amount of fruit
For the spring cucumber, if the plants are long, they can leave the root melon as early as possible to promote the transformation from vegetative growth to reproductive growth, and then regulate the growth of the plant. However, the root melon should be removed in due course so as not to fall down on the tree and affect the fruit set in the later period. For a large number of peppers over the winter, if the plants grow vigorously, you can take more to control fruit trees and then the practice of fruit thinning.
IV Spraying plant growth regulators
The plants can be sprayed with a 750-1000-fold booster or a 1500-2000-fold dilution of chlormethorine after a period of growth. However, when using growth inhibitors in the spring, it is necessary not only to pay attention to the amount of use, but also to pay attention to the weather conditions. After the growth inhibitors are sprayed, once the temperature drops, under the dual effects of low temperature and growth inhibitors, it is very easy to cause vegetable growth. over.
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