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(Original title: If you have finished harvesting corn, you should hurry up with urea, otherwise it will reduce production. Do you know the reason? )
[ China Agricultural Machinery Industry News ] With the end of the wheat harvest, the problem of straw treatment has also been re-introduced. The current straw treatment method is to return the straw to the field, which can effectively improve the soil properties, accelerate the soil ripening process, and improve soil fertility. But returning straw to the field can also cause a series of problems. For example: insufficient nitrogen, affecting crop yields.
The corn is in the midst of a raging harvest, and the scene of the smashing of the corn in the field is reduced. What is more is the roar of the combine harvester. There is no such thing as corn, thresher, and corn peeling. I feel that I still miss the sight of the past.
Before the combine harvester, a group of people went to the ground to smash the sticks, cut the cornstalks, and sun-dried the corn cobs at home. The family used an awl to peel the corn at night. It is now replaced by a combine harvester.
Corn stalks are not allowed to burn, and harvesters that conform to the market have become popular. After collecting the corn, directly smash the straw in the ground, and get more at one stroke.
Saving manpower, but also doing straw back to the field, but many people do not know what to do when the straw is returned to the field, most of the growers just leave the corn intact, let the broken straw naturally corrode in the field.
The corn mash that returns the straw to the field has a low rate of wheat sprouting, and the wheat seedlings are yellow and weak. Many people are surprised that others say that straw is a good fertilizer, but why is the wheat that is returned to the field, but the growth is weaker than the lack of straw?
The main reason for this phenomenon is that the ratio of carbon and nitrogen is imbalanced, which causes microorganisms in the soil to grab nitrogen with wheat, and the lack of nitrogen is naturally weak.
Because the carbon to nitrogen ratio of corn stover is 75:1, and the carbon to nitrogen ratio of organic matter to microorganisms is 25:1. When the straw is decomposed, the microorganisms will be robbed from the soil due to insufficient nitrogen in the straw. Nitrogen, so there is a shortage of nitrogen.
The correct way should be to apply 20 kg of urea per mu of land after the straw is returned to the field, and turn the land deep. It is better to rotate the rotary tiller once, so as to bring good results and avoid the shortage of nitrogen in the straw returning to the field.