The temperature is high, and the vegetables grow "crazy" after planting, what should I do?

Now the temperature is high, and the vegetables grow seriously after being planted, resulting in poor fruit setting of the vegetables. So how should it be managed? It is recommended that everyone take multiple measures to control prosperity.

The dangers of high night temperatures

From the physiological point of view of vegetables, leaves perform photosynthesis during the day to synthesize and store organic nutrients, while at night, they decompose organic nutrients through respiration to supply their own vegetative growth. The higher the night temperature, the stronger the respiration, the more organic products decomposed, and the more the plants are inclined to vegetative growth, which is why the plants grow leggy under high temperature and low light. At the same time, due to the large consumption of organic nutrients, flower buds and fruits cannot get enough nutrient supply, which in turn manifests as flower drop, fruit drop, and abnormal fruit growth.

Night temperature control measures to prevent leggy growth

Reasonable ventilation to control night temperature

At present, vegetable farmers should adjust the opening and closing time of the tuyere according to the weather conditions, the insulation of the greenhouse and the types of vegetables grown, to avoid excessive night temperature, reduce breathing consumption, and promote reproductive growth. In fine weather, vegetable farmers can close the tuyere when the shed temperature drops to about 18°C.

Strengthen management to prevent leggy

In order to prevent the plants from growing too long, the fertilizer and water can be properly controlled according to the growth of the plants, especially the vegetables in the early stage of growth. If the vegetables are leggy during the fruit-setting period, the vegetable farmers can keep more fruits and pick them late in time, which can inhibit the vigorous vegetative growth and promote the transformation of the plants from vegetative growth to reproductive growth.

Suppress top edge by managing small measures.

For example, in order to prevent lodging, many vegetable farmers hang branches earlier, resulting in strong apical dominance and serious plant growth. Vegetable farmers do not need to rush to hang the branches. By increasing the opening angle of the main fruiting branch, the apical dominance of the plant is suppressed and the fruiting is promoted. For plants that are prosperous, they can also inhibit vegetative growth by leaving fruits early to avoid prosperous growth.

Reduce nitrogen fertilizer usage.

Vegetable farmers use rice husk manure, chicken manure, etc. as base fertilizer, which contains a lot of nitrogen. In the early stage of flowering and fruiting, nitrogen fertilizer can fully meet the needs of growth, and there is no need to fertilize early.

Reasonable pruning and fruit retention

Combined with the growth of the plants, for leggy plants, due to the thin and weak stems, it is necessary to keep the fruit late, and pick them in advance in time. After the growth of the plants is restored to robustness, or the number of remaining fruit is increased, normal pruning and fruit retention are carried out. For leggy seedlings, you can lay down the seedlings without hanging the vines first, weaken the vertical growth potential of the plants, and cultivate robust seedlings.

Chemical control

If the plants are still leggy after physical control measures, it is recommended to use chemical agents to control the growth, but remind vegetable farmers that the control agents should be sprayed separately and should not be mixed to prevent phytotoxicity, and only the top of the plant should be sprayed when spraying. , the concentration should not be too large. When using, it must be combined with the weather conditions and plant growth. It must be adjusted flexibly according to local conditions, and the appropriate concentration of the agent should be configured. It is best to do a small area test before use, and then spray the whole shed.