Corn is a high-water-tolerant fertilizer and requires high-yield crops. The application of balanced fertilization technology is an important measure for the significant increase in maize production. About 200 kg of corn need to be absorbed from the soil per 2.2 kg of corn, with an average of 2.57 kg; phosphorus (p2o5) 1-1.5 kg; potassium (k2o) 1.52-4.00 kg, an average of 2.14 kg, the higher the yield The more nitrogen, phosphorus and potassium are absorbed.
First, the characteristics of corn requirements and fertilization principles
Corn is very sensitive to nitrogen fertilizer. On the basis of applying farmyard manure and phosphate fertilizer, within the range of 3-10 kilograms of urea per acre, 1 kilogram of urea can increase 6-11 kilograms of corn. Phosphorus is less required for corn, but it cannot be lacking. Phosphorus is lacking at the three-leaf stage, which will lead to the subsequent empty straw baldness. The corn is a zinc-promoting crop. Applying zinc fertilizer increases the yield by about 15%. The principle of fertilizing corn is based on organic fertilizer, re-applying nitrogen fertilizer, applying phosphate fertilizer, increasing potassium fertilizer, and applying micronutrient fertilizer. Farmyard manure and phosphorus, potassium, and trace fertilizers were used as base fertilizers, and nitrogen fertilizers were mainly topdressing fertilizers. Spring corn top dressing should be light before heavy, summer corn should be light before heavy.
Second, determine the amount of corn fertilizer
Tests have shown that on medium-fertility plots, it is necessary to apply 5 kg of nitrogen, 2 kg of phosphorus, and 3 kg of potassium per 100 kg of corn. The application of this amount of fertilizer is very simple. It is only necessary to multiply the number of kilograms of production increase by the amount of fertilizer required for a hundred kilograms of grain. This is only a reference calculation method, and the specific application should also be properly adjusted due to the differences in land use and species. The reference fertilization amount per mu of jacking corn is: 1500 kg of farmyard manure, 9-11 kg of nitrogen, 4-5 kg ​​of phosphorus, 5-6 kg of potassium, and 1 kg of zinc fertilizer.
Third, fertilization method
(1) Spring corn in the shallow top of base fertilizer: The required phosphorus, potassium, zinc fertilizer and 2-3 kilograms of urea should be blended with the farmyard fertilizer and applied to the planting hole to ensure proper planting. The remaining nitrogen fertilizer is left as top dressing. The mulching in the mountainous areas covers live corn: the mulching corn grows stronger and consumes more nutrients. It is necessary to use the phosphorus, potassium, zinc fertilizer and 70% nitrogen fertilizer as the base fertilizer for the whole growth period of corn. The method is to open a groove about 3-4 inches deep and 8 inches wide between sowing two rows of corn. First apply the nitrogen fertilizer to the bottom layer, mix all the phosphorus, potassium and zinc fertilizers with the farmyard fertilizer and apply it on the nitrogen fertilizer. Then ridge cover soil, 2-3 inches high ridge, sowing film.
(b) Seed Fertilizer For uncoated seeds, sowing before the broadcast 2-3 days, with zinc fertilizer 2 money plus one or two, 1.5-2 kg seed dressing, heap dull for 1 hour, spread out and dry to plant. At the time of sowing, the conditional peasant households use 20 to pick up about 2 people of animal manure urea and 2 kg of urea, sowing seedlings at the edge of the seedlings to reach Miao Qi Miao Zhuang.
1. Live spring corn crops should be light and heavy. Nitrogen fertilizer fertilizers (6-7 leaf stage) accounted for 1/3 of total nitrogen application, and horn fertilizer (10-11 leaf stage) accounted for 1/3.
2, live summer corn top dressing should be light before. Summer sowing of glutinous maize is very important due to the busy agriculture and the tight agriculture time, most of which are seeded with white seeds. The jointing fertilizer (5-6 leaf stage) should account for two-thirds of the total nitrogen application, and horn fertilizer (10-11 leaf stage) accounts for one third.
3. Transplanting corn to top-dressing: When transplanting, mu with 10 kg of urea or other nutrient content of other nitrogen fertilizer is mixed into human excrement. Put the nutrient seedlings first, and then cover the nests with leaching manure to replace the jointing fertilizer. To the trumpet period, apply about 15 kg of urea again.
4. Plastic film corn: Due to sufficient base fertilizer and long fertilizer effect, 30% of nitrogen fertilizer that is not applied per acre will be applied once in the bell mouth. The method is to apply a fertilizer hole every two corns and apply fertilizer.
Zhuhai Mingke Electronics Technology Co., Ltd , https://www.zhmkdz-electronics.com