Latest Key Points for Fertilizer and Water Management of Crops in Winter
In winter, many plants enter a dormant period, and at this time fertilizer and water management for crops must be handled with great care, otherwise even a slight mistake can affect the crops' growth in the coming year. So how should fertilizer and water management for crops be done? Follow the editor and take a look.
1. Do not water or fertilize too much
In winter, both the air temperature and soil temperature inside greenhouses are relatively low. At this time, crops absorb fertilizer nutrients slowly. If fertilization is carried out according to the previous amount, the fertilizer will only accumulate in the soil and cannot be absorbed by the roots. Over time, the solution concentration in the soil will rise, causing burns to the crop roots, and in severe cases it can even lead to crop death or leaf wilting. Likewise, after watering in winter, both the soil temperature and soil aeration are affected, resulting in yellowing leaves or root rot, so watering should also not be excessive.
2. Fertilize according to the weather
When the soil is relatively moist, there is no need to apply flush fertilizer, so as to avoid root rot and yellowing leaves. When applying flush fertilizer, in order to avoid cloudy days after fertilization, it is best to fertilize when the weather clears after a cold snap. If cloudy days occur during flush fertilization, the humidity inside the greenhouse will increase further, making it difficult for the surface temperature to recover, which is not conducive to the growth of vegetables.
3. Pay attention to ventilation
A greenhouse is a closed environment with relatively poor ventilation. When nitrogen-containing chemical fertilizers are used, nitrogen gas is released during the decomposition of the fertilizer. Once the concentration of nitrogen gas exceeds the standard, the stems and leaves of crops will change color. Therefore, from winter to early spring, nitrogen-containing chemical fertilizers should be reduced as much as possible to avoid harm from toxic gases such as nitrogen gas. In addition, attention should be paid to proper ventilation at noon on clear days. At this time the temperature is relatively low, and proper ventilation can promote crop growth and development.
4. Temperature management
On the second day after applying flush fertilizer, the vents can be properly closed to raise the temperature inside the greenhouse by 2-3 degrees, which can effectively increase the surface temperature and ease the adverse effects caused by flush fertilization.
The above is an introduction to the key points of fertilizer and water management for crops in winter. We hope it can help you. If you want to learn more related knowledge, please stay tuned to us.