Misunderstanding of vegetable management in greenhouse in winter

Recently, due to the cold air attack, the temperature dropped sharply, at this time to grow vegetables need to pay attention to some details, otherwise a small mistake will cause serious losses to vegetables in the greenhouse. And winter greenhouse vegetables in the management should pay attention to the following misunderstandings, along with the editor to have a look.

1. The higher the temperature, the faster the growth.

Many vegetable farmers believe that the main function of the greenhouse is to keep warm, and that the higher the temperature, the faster the vegetables grow, which is a wrong idea. Vegetables have an upper limit on temperature, and the general temperature should not exceed 32 degrees. Once the temperature is too high, the respiration of vegetables will be strengthened, resulting in plant disorder, overgrowth, imbalance between vegetative growth and reproductive growth, and yield will decrease.

Preventive measures: it is necessary to set up two air vents in the greenhouse to cool down in time, and the second is to manage strictly according to the temperature needed during the growing period of vegetables, so as to avoid the phenomenon of long leaves without fruit caused by high temperature.

2. the more fertilizer you apply, the faster you grow.

Many vegetable farmers think that fertilizer can promote the growth and development of vegetables, so the more fertilizer, the faster the vegetables grow, which is also a wrong idea. The soil salt content needed for the growth and development of vegetables is limited, but the root system will appear reverse osmosis after excess, resulting in plant death and yield decline. Especially in the environment of high temperature and humidity, the decomposition of organic fertilizer is fast, the volatilization of nitrogen fertilizer is large, and excessive fertilization is easy to cause fertilizer damage.

Common sense of prevention: generally grow vegetables for more than three years, farm manure needs to be controlled within 2500 kilograms, chemical fertilizer needs to be reduced to about general. For the plots with high salt content, more humic acid and bacterial fertilizer should be applied to increase the ratio of soil carbon to nitrogen, increase soil permeability, reduce oxygen content and reduce fertilizer damage. In addition, it is necessary to balance fertilization and supplement trace elements such as boron, zinc and magnesium to strive for sustained high yield.

3. The more prosperous the vine, the better.

Many farmers think that the stronger the vine growth, the better the crop growth. in fact, the water is leafy and the root is shallower, and too late vegetative growth is bound to affect reproductive growth and reduce yield.

Preventive measures: first, squatting seedlings in the seedling stage. Promote the root system to tie down and form strong seedlings; second, the vegetative growth of vegetables is exuberant in the early stage, while the reproductive growth in the later stage is fed, so a certain assimilation leaf area is needed in the early stage. In the later stage, it is necessary to control the vine to promote fruit and increase the yield.

4. The more frequently spraying, the fewer diseases.

In order to control diseases and insect pests, many vegetable farmers spray pesticides every 2-3 days in the middle and later stages of growth, because the more frequently they are sprayed, the lower the incidence of diseases. In fact, the more frequently spraying agents, it is very likely to cause drug damage, which is extremely disadvantageous to crop production.

Preventive measures: first of all, if you want to change the ecological environment, if the field humidity is high, the field permeability is poor, then even if spraying every day is not necessarily good. Second, we should improve the soil, pay attention to soil treatment when transplanting, especially pay attention to soil-borne bacteria, targeted pesticide prevention. Third, it is necessary to prescribe the right medicine and choose copper preparations as far as possible, which can not only kill fungi and bacteria, but also promote crop growth.

The above is the misunderstanding of vegetable management in winter greenhouse. I hope it can help you. If you want to know more about it, please follow us.