The deficiency of base fertilizers for top dressing and base fertilizers (mainly farmyard fertilizers) has the advantages of increasing the organic matter content of the soil and enhancing the aggregate structure of the soil. Most farmers often ignore this point in corn cultivation, and do not pay attention to the application of basal fertilizer. "Filling up the base fertilizer (mainly based on chemical fertilizers)" can only make the soil more leaner and more compact. It is a predatory cultivation method and it is not desirable.
When there is fertilizer on the chase, there is water in the seedling stage before the jointing of corn. If it is not based on actual conditions such as the degree of drought, good or bad conditions, and the condition of the seedlings, timely and appropriate top-dressing and watering will often result in the aerial part of corn. The seedlings are long and the underground part of the roots is difficult to lower, which causes the corn to lose the chance of seedlings training, thus laying down hidden troubles for the corn plants. The top-dressing and watering during corn filling period not only increases the investment in corn production, but also wastes fertilizer. At the same time, it also causes late-maturing corn glutinous rice, and even causes frost and other adverse consequences.
Diazo phosphorus potassium, light micro fertilizer corn in the process of growth and development, not only need a large amount of nitrogen, phosphorus and potassium fertilizer, but also trace elements such as trace fertilizer. In the growth and development process of corn, although the demand is small, but it is not trivial, we took zinc fertilizer. Some experiments showed that the appropriate amount of zinc fertilizer was applied to corn, and the number of grains per spike increased by 50 to 80 grains compared to the control, and the grain weight increased by 15 ~ 30 grams, generally 8% ~ 15% of corn per acre.
After heading without top-dressing, the majority of plots are underutilized or the quality of base fertilizers is not high, and the fertilizer efficiency is almost exhausted. The nutrients in the soil can no longer meet the needs of the later growth and development of corn. In order to obtain high-quality and high-yield corn, Apply some fast-acting nitrogen fertilizers to prevent premature corn aging, promote corn filling and grain filling, and increase grain weight. This time, the “grape attacking fertilizer†cannot only be saved, but it is necessary to apply it early, apply acupuncture points, and apply in appropriate amounts. We must thoroughly change the old practice of “establishing autumn ties and making unrestrained visits.†After the beginning of autumn, it should not be idle, but should be superficial and diligent. It should remove the big grass and lay the foundation and guarantee for “clearing†production next year.
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