Summary of high-yield fertilization techniques for winter wheat, winter wheat is the main food crop, and its growth period is long, which is one of the crops with more fertilizer. Studies have shown that under normal cultivation conditions, for every 100 kg of wheat produced, about 3 kg of nitrogen should be absorbed from the soil, 1 to 1.5 kg of phosphorus pentoxide, 2 to 4 kg of potassium oxide, and the ratio of nitrogen, phosphorus and potassium should be about It is 3:1:3. In addition, the amount of fertilizer needed for different growth stages of winter wheat is different. The nutrient is absorbed more during the tillering stage before winter, and the nutrient is absorbed less when wintering. After returning to green, it absorbs a lot of nutrients. From the jointing to the flowering stage, it is the peak period of winter wheat absorption nutrients.
Apply enough base fertilizer to cultivate strong seedlings. The farmer said that "the wheat is rich and the base is the foundation." Applying the base fertilizer to promote the growth of strong seedlings and roots, there are a certain number of healthy tillers before winter, and lay the foundation for the growth of ear, grain and weight gain after spring. The base fertilizer is generally applied in combination with ploughing and ploughing before planting. In the dry land, the fertilizer can be applied to the bottom of the plow and then turned over. The soil is heavily viscous and the soil is firstly spread, then ploughed, and the fertilizer is turned into the soil. in.
Green control to prevent lodging. The spring tillering of the regreening wheat began to occur. The management principle of this period is to consolidate the large divergence before winter, control the ineffective spring, and maintain the stable development of the group. For Wangchangtian block, top dressing is generally not needed to control and delay the occurrence of spring tillering and elongation at the base of the stem to prevent lodging. For wheat with weak growth, in the greening and rising period, combined with watering for topdressing, apply high-nitrogen compound fertilizer or nitrogen fertilizer 15-20 kg per acre to increase effective tillering and strive for sufficient number of ears per mu.
Jointing and re-application, increase the grain of the ear. The jointing stage is the period of reproductive growth and vegetative growth. The demand for nutrients is large, so it is necessary to re-apply the joint fertilizer to increase the number of grains per panicle. For high-yield, high-yield fields, 20-30 kg of high-nitrogen compound fertilizer per acre combined with watering at jointing stage can reduce inefficient tillering, promote stalk robustness, improve the ability of wheat to resist lodging, and strive for large-grain, full-grain Multi-grain weight.
Top dressing increases the grain weight. The heading and filling period is a key period for the grain number and grain weight of wheat. The main target of management is to prevent greed, premature aging and increase grain yield. In this period, the soil is generally no longer fertilized, so as not to cause gluttony and late maturity. It can be combined with the control of wheat ear mites. Spraying potassium dihydrogen phosphate solution on the foliar surface can effectively improve the ability of wheat to resist dry hot wind, delay leaf senescence, increase 1000-grain weight, and achieve the purpose of increasing yield.
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