When is the best time to water the wheat? How to use chemical fertilizer is the most reasonable?

Wheat should be topdressed with green manure and watered with green water until the Spring Festival. It is most suitable to apply green fertilizer to wheat within a few days. By that time, it will be too late to apply anti-green fertilizer after nine days, and the wheat has already started to jointing and grow taller. In general, wheat green manure and green water are carried out simultaneously. Apply green manure first, and then water green water quickly, so as to prevent the fertilizer from burning the wheat roots and affecting the normal growth and development of wheat. If it is sunny, water green water immediately after topdressing to prevent urea from harming wheat. If it rains, topdressing can save water. Greening water doesn't have to be watered, except topdressing greening fertilizer on sunny days, which depends on soil moisture in wheat fields. When there is enough rain, there is no need to water it; If it doesn't rain for a long time and the soil moisture is poor, it needs to be watered once to prevent spring drought.

Most wheat in early spring can't be watered too early. I would rather water it later than earlier. Under normal circumstances, farmers will irrigate enough fertilizer and water before winter to ensure that wheat can quickly absorb nutrients and grow rapidly. In this way, wheat can enhance its resistance and store enough nutrients for the winter. However, some farmers may not water the wheat before winter, which may easily lead to excessive drought and withering. If this is the case, it is necessary to water it in time when the weather gets warmer to prevent the wheat from dying.

It is difficult to predict the weather in early spring in the north, and the temperature difference between day and night is very large. Unless the weather temperature is relatively stable and stays above 4 degrees, it is best not to water it. If you must water it, don't pour it in large quantities. You should spray water to dry it. This can prevent wheat from freezing to death due to low temperature at night, and at the same time can alleviate the drought of wheat. It is very important to water the wheat to make it green. Once the weather is cold at the end of spring, premature watering can easily lead to frostbite. It is best to wait until the temperature is stable before watering. Nitrogen fertilizer should not be used in the greening stage, and potassium fertilizer or phosphate fertilizer can be used in moderation. However, in the turning green stage, small granular urea will be the main material, and turning green water will be poured at the same time, so that wheat can be easily absorbed and accumulate energy for subsequent growth.