Snow fertilization technology refers to an important technique for fertilizing winter crops such as winter rape and winter wheat planted on dry lands using winter snowfall, and in fields with poor fertility and weak pre-winter seedlings.
The main effect of post-snow fertilization of crops is that after the winter crops return to spring, with the increase of temperature, the growth rate is accelerated, and the vegetative growth and reproductive growth of some crops are carried out at the same time. This is an important period for fertilization and water use. The use of winter fertilizers has solved the phenomenon of defertilization due to lack of fertility during the period of strong fertility of spring crops, promoted the transformation and upgrade of the seedlings, and laid the foundation for high and stable yields.
The specific fertilization requirements are that when the snowfall reaches 8 to 10 cm, evenly volatile, fast-dissolving compound fertilizers (such as potassium phosphorus nitrate) should be evenly spread on snow. Generally, 15 to 20 kg per mu can be applied, and the fertility is poor. The amount can be increased to 20 to 25 kg. It can also be applied to the fields before the snowfall according to the weather forecast, so that the snow will be covered with chemical fertilizers, and the fertilizer will melt with the snow and infiltrate into the soil.
Pay attention to fertilization, if the amount of snowfall is too small, do not apply chemical fertilizers, because it is difficult for chemical fertilizers to completely melt, fail to achieve the desired results, and can easily lead to loss of fertilizer and pollute the environment.
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