Using high-quality agricultural fertilizer as base fertilizer can increase soil organic matter and soil aggregate structure, and provide various nutrients needed for corn growth and development. Fertilizer does not have this advantage. "Insufficient base fertilizer to chase (chemical) fertilizer generation" can only make the land more and more thin, and the more the species will become more and more knotted.
Misunderstanding 2: There is fertilizer to chase, there is water to pour
In the seedling stage before jointing, if the topdressing and watering are not carried out according to the actual conditions such as the degree of drought, good moisture, and the strength of the seedlings, the seedlings in the upper part of the ground are often long, and the roots in the lower part are difficult to deepen, so that the seedlings are lost. The opportunity for the seedlings to exercise, to plant the plant after lodging to bury hidden dangers. Excessive topdressing and watering during the filling period not only increases investment, but also wastes fertilizer, and also causes corn to be late and ripe, and suffers from the adverse consequences of frost.
Misunderstanding 3: Most of the water and more water
Fat and water is a prerequisite for high yields of corn. But improper use is only harmful and unprofitable. Spring sowing corn begins at jointing stage, and vegetative growth and reproductive growth go hand in hand. The booting to heading reaches the peak period, and the flowering to filling stage turns to reproductive growth. The period from the booting to the filling stage is the period in which the water and fertilizer are most needed. The cultivation should be carried out with “three top dressing, three watering, and three medium farmingâ€. After the beginning of jointing, the first point of topdressing is carried out, and timely tillage is carried out. After the start of the booting, a second top dressing is carried out and cultivating. In the third round of top dressing during grouting, the total amount of these three top dressings should not exceed 30 kg. The amount of topdressing can be grasped before the light, medium and heavy weight: the jointing period is 30% of the total fertilization, the booting stage is 60% of the total fertilization, and the filling period is 10% of the total fertilization. Topdressing with urea is appropriate.
Misunderstanding 4: Emphasis on NPK, ignoring micro-fertilizer
Micro-fertilizer has a great influence on the growth and development of crops. In terms of zinc fertilizer, corn is very sensitive to its response. Some experiments have shown that: the application of zinc fertilizer in corn, the number of grains per ear can be increased by 50 to 80, the weight of 1000 grains can be increased by 15 to 30 grams, the rate of baldness is reduced by about 50%, and the yield per acre is increased by 8% to 15%.
Misunderstanding 5: No need for topdressing or cultivating after heading
After the heading of corn, there are many plots due to insufficient or low quality of the base fertilizer, and the effect of topdressing has been exhausted. The nutrition in the soil can not meet the growth needs of corn. It is urgent to consider some quick-acting nitrogen and phosphorus fertilizers to prevent premature aging, promote grouting and grain fullness, and increase 1000-grain weight. This time, "seeding the seed fertilizer" should be applied early, the hole is applied, and the amount is applied. To change the old practice of "establishing the autumn hook, eliminating the leisure and other autumn harvest", it is necessary to be shallow, diligent, and always keep alive.
Feicheng Agricultural Bureau Zhao Xuening
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