The specific role and necessity of fertilizer
Fertilizing is the method of applying a small amount of fertilizer under the seed when the crop is sown. Different names are called different places, such as the northeast region will be called fertilizer "mouth fat." Fertilizer is a fertilizer method that saves fertilizer and improves fertilizer efficiency.
The specific role of seed fertilizer is mainly to achieve strong seedlings, laying the foundation for the final high crop yield. The seedling growth of spring sowing maize, cotton and soybeans does not require much nutrition. It requires that the supply of seed fertilizers is small and fine, but the response of the crops to the nutrition level is very strict and sensitive, especially general crops for phosphorus nutrition. The critical period of demand is at the seedling stage. If there is a slight shortage of phosphorus supply, symptoms of phosphorus deficiency will affect the subsequent production. Therefore, fertilizers are particularly demanding for the supply of phosphate fertilizers. For example, in the three-leaf period of maize, there is a purple leaf symptom, and when the soybean seedling lacks phosphorus, two leafy leaves show yellow leaf disease. Once the symptoms of phosphorus deficiency appear at the seedling stage, it will be difficult to make up for the loss caused by the lack of phosphorus at this time even if the phosphate fertilizer is added later. Especially when planting corn and soybeans in soils with low fertility or no organic fertilizer all year round, it is necessary to combine planting with phosphorus fertilizers.
Fertilizer with the principle of fertilizer, with phosphorus as the main nitrogen, at the same time to accurately fertilize the spring crop sowing fertilizer most need phosphate fertilizer, followed by appropriate amount of nitrogen fertilizer. Both promote growth and keep seedlings strong. During the seedling stage of spring crops such as corn, cotton, and soybean, phosphorus is urgently needed. Phosphorus-applied fertilizer can promote the development of root system and improve the stress resistance of seedlings, so as to meet the target of Miao Qi and Miao Zhuang under adverse conditions such as cold-tolerance or drought.
The amount of fertilizer applied is much less than that of basal fertilizer. Fertilizers with seed fertilizers can be either unit fertilizers or compound fertilizers. First of all, in the unit phosphate fertilizer, superphosphate is a quick-acting phosphate fertilizer, which can be used as a fertilizer. The appropriate dosage is between 6 and 10 kilograms per mu. In the unit nitrogen fertilizer, ammonium sulfate is used as a seed fertilizer, which has no adverse effect on seed germination and is an ideal nitrogen fertilizer variety. The amount of 5 kg per acre is appropriate, other nitrogen fertilizers are not all suitable for seed fertilizer. For urea, because of its high nitrogen content, it is generally not suitable for seed fertilizer. If only urea is used as a seed fertilizer, the dosage should be controlled. It is appropriate to apply 2.5 kg of urea per acre, and it is required that the content of biuret in urea products should not be More than 1%.
In the compound fertilizers, DAP is a fast-acting N- and P dual-component compound fertilizer with high total nutrients and is mainly supplemented with phosphorus, which is suitable for all types of crops. In the spring sowing of corn and soybeans in the northeastern region, farmers are accustomed to using diammonium phosphate as mouth fat, with an average dosage of 3 to 5 kg/mu, which works well. High-nitrogen compound fertilizers, due to high nitrogen content and low phosphorus content, do not meet the requirements of seed fertilizers, and the application rate is a little higher. High concentrations of urea-based nitrogen will inhibit seed germination. In recent years, high-nitrogen compound fertilizers have been used as seeds. The burning of seedlings caused by fertilizers is more serious and widespread.
Accurately grasp the application position of seed fertilizer
Do not directly contact the seed with the seed fertilizer to prevent burning the roots. Phosphorus-nitrogen-phosphorus fertilizers should be applied at a certain depth below or below the seeds. It is advisable to isolate 2-5 cm between seed and fertilizer. Especially when high concentrations of phosphorus and urea are used as seed fertilizers, the dosage must not be controlled, and direct contact with the seed must be avoided.
Under the conditions of mechanical sowing, the seeds and fertilizers should be separated from the two reserve tanks and the two pipes, so that the fertilizers and seeds are not on the same soil surface to ensure safe emergence.
In short, one of the keys to fertilizer application is to master the position of the fertilizer and apply it under the slope of the seed to separate the seed from the fertilizer, otherwise it will burn seedlings. Second, the allocation of fertilizers should be based on the appropriate amount of phosphorus with nitrogen, strictly control the amount of nitrogen, so that precise application, accurate location.
The fruit, corn, contains a lot of magnesium, which is known to be one of the few trace elements in the food and can help prevent cancer development.And the fruit corn contains a substance called glutathione, which can make some chemical carcinogens in the body toxic.To ward off cancer.
Although corn is highly nutritious, it is rich in crude fibre, so for children with delicate stomachs, too much of it can easily cause indigestion. If you add milk to the juice and then give it to your child, it will be less taxing on the stomach and more nutritious, and your child will be able to eat more food. (This method uses a wall breaker, but if you don't have one, a juicer is fine.)
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