High-yield fertilization techniques for wheat! When is winter wheat fertilized?
Importance of applying wheat seed fertilizer
Seedling stage is an important stage of wheat hairy tillering. The root system is well developed and has many tillers, which can fully utilize the nutrients and water in the deep layers of the soil, and form more effective tillers, laying a foundation for high yield.
Summer and autumn rainwater will carry soluble nutrients, especially nitrate nitrogen to the place where the water flow stops, which is the leaching of nutrients. Due to nutrient leaching, the upper soil nutrient is lacking, and the wheat seedlings are weak and cannot obtain sufficient nutrients from the lower layer.
Straw biting is also a condition of plundering soil nutrients. Most of the dry land in the north, only one season of wheat is planted in a year. It is harvested by machine, and the wheat stubble is kept high. After harvesting, the wheat bran is turned into the soil when the wheat is planted. This measure is good for accepting precipitation and also providing energy materials for microorganisms. However, the less carbon and nitrogen in the wheat stalks will cause the microbes to seize the nitrogen in the soil, so that the wheat does not get the nitrogen needed, resulting in severe production cuts.
The fertilizer should be based on nitrogen and phosphate fertilizers.
At present, the most common and most convenient way to apply seed fertilizer is to sprinkle chemical fertilizer on the seeding, then spin till, apply the fertilizer to the soil layer of about 10-15 cm, and then plant it. The advantage of this method is that the application of fast-acting nutrients is immediately utilized by wheat seedlings; the application depth is where wheat seedlings can reach;
The surface layer is rich in nutrients and can meet the requirements of wheat tires. The fertilizer should be mainly nitrogen fertilizer and phosphate fertilizer. Generally, 15-20 kg of urea per mu and 50 kg of superphosphate can be applied. 40-50 kg of compound fertilizer can also be applied. The amount is adjusted according to the soil nutrient condition. It should be noted that the phosphate fertilizer is applied to the soil and is not easy to flow, so it should be applied as deep as possible.
Focus on the application of trace element fertilizer
The application of nitrogen and phosphorus fertilizers is likely to lead to insufficient trace elements. Trace elements include five nutrients such as boron, zinc, molybdenum, manganese and copper, but it is customary to include iron as an element. These elements are characterized by a small amount and a small amount, but their effects are not "micro". In the experiment, 0.5 kg of zinc sulfate and 0.5 kg of ferrous sulfate per acre were mixed with the nitrogen and phosphorus fertilizers, which increased the yield of wheat by more than 14%. (Miao Yanfang Wang Zengrang Li Shengxiu)
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The most common waxy and sweet corn market, waxy corn has higher nutrient content than ordinary corn, containing 70-75% starch (and almost all amylose), more than 10% protein, 4-5% fat and 2 % Of multivitamins have more grains, VA, VB1, and VB2 than rice with the highest content of protein, fat and VB2. Yellow corn also contains carotenoids, such as rice and wheat. The molecular weight of waxy corn starch is more than 10 times smaller than that of ordinary corn. The starch makes glutinous rice sticky and softer than ordinary hard corn. Its digestibility is more than 20% higher than that of ordinary corn, and it is suitable for people with irregular teeth. At the same time, the content of amylose (a kind of polysaccharide) is very high, which is not suitable for diabetics.
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