The best topdressing period for 7 crops such as corn and rice
The best topdressing period of corn: Under the principle of balanced fertilization, corn is the peak period of nutrient absorption after jointing to large bell mouth. Generally, the first fertilizer can be applied before and after jointing. 10 kg of urea should be applied per acre; 7-10 days before the tassels should be applied, the second fertilizer should be applied, and 20 kg of urea can be applied per acre. If the base fertilizer and the seed fertilizer are sufficient, and the soil is very fertile, one can concentrate the top dressing and combine the second weeding for deep fertilization.
The best topdressing period of rice : the absorption of nitrogen fertilizer by rice is gradually increased from the time of greening, and reaches the highest peak of fertilizer absorption at the peak of tillering. In order to promote early rice and early tillering, early application and heavy application of manure should be applied. Generally it can be 7-10 days after transplanting. 10 kg of urea per mu is topdressed, and 15-20 kg of urea is applied after heading.
The best topdressing period of sorghum : In order to meet the nutrient needs of sorghum from jointing to heading, the first fertilizer should be pursued at the jointing stage, and 8-12 kg of urea should be applied per acre; 10 kg of urea per mu.
The best topdressing period of peanut : the nutrient critical period of peanut is in the early stage of fertility, and about 15 days after emergence of peanut, the flower bud begins to differentiate and the nodule begins to form. When two pairs of side branches appear in the plant, the nitrogen fertilizer should be applied once in time, and 5-10 kg of urea should be applied per acre. After the peanut is flowered, it is combined with the soil and sprayed with multiple micro-fertilizers, which is beneficial to reduce the empty fruit rate and increase the peanut yield.
The best topdressing period for soybeans : Soybeans are crops that require more nitrogen, but they have rhizobial nitrogen fixation that can solve some of the nitrogen sources. However, during the growth period, the fertilizer should be applied in stages. Usually, the nitrogen fertilizer is applied once in the early flowering stage of soybean, which can reduce the rate of flowering and falling, and can prolong the life of the plant, increase the grain weight and increase the yield. Generally, 8-12 kg of urea can be applied per acre. In the pod-forming stage of soybean, if the multi-micro-fertilizer is sprayed once on the leaf surface, the yield increase effect is more obvious.
The best topdressing period of beets : After the seedlings are fixed, the beets quickly turn into the lush growth stage. In the early stage of beet growth, about 10 kg of urea per mu should be applied.
The best topdressing period of potato: Generally, the topdressing can be carried out before the flowering stage of the potato. The early maturing varieties are suitable for topdressing in the seedling stage. The middle and late ripening varieties are better applied before the bud, and 10 kg of urea and potassium sulfate are applied per mu. 10 kg, not only can increase production, but also improve quality.
It should be noted that crops should be fertilized rationally under the principle of balanced fertilization. Topdressing is only an important part of the fertilization program, and the base fertilizer cannot be ignored.
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