Misunderstanding one: Base fertilizer is insufficient for fertilizer generation. The use of high-quality farmyard fertilizer as base fertilizer can provide various nutrients needed for the growth and development of corn. The use of fertilizer as a top-dresser to make up for the deficiency of basal fertilizer can only make the land more and more lean, and the more it grows, the more it builds. Misunderstanding 2: see fertilizer to use. Maize base fertilizer should be based on the characteristics of the soil to choose different fertilizer varieties. Low-lying land and saline-alkali land should use acidic fertilizers such as ammonium sulfate and superphosphate; acidic soils should use alkaline fertilizers such as urea and ammonium bicarbonate; and low-volatile urea should be used for sandy lands with poor water and fertility conservation capabilities. Myth 3: There is fat to chase. Before the jointing, top dressing often results in shoots being long and the underground roots are difficult to deepen. This leaves the seedlings losing the chance of seedlings training and planting hidden dangers. Excessive top-dressing during the grain filling period will cause corn gluttony to ripen and suffer the adverse consequences of frost. Misunderstanding 4: Fertilizer can produce more. Adequate fertility is a prerequisite for high yields of corn. However, improper use is only harmful and unprofitable. The spring sowing of maize was carried out for the first time from the jointing stage to the top-dressing cultivator, and after the start of the booting, the second top-dressing cultivator was conducted, and the top dressing was performed for the third time during grouting. Topdressing with urea is appropriate. The total amount of top dressing is not more than 30 kg, and the second time is more than 60% of top dressing. Myth #5: Pay attention to nitrogen, phosphorus, and potassium and lighten trace element fertilizer. Trace element fertilizers have a great influence on the growth and development of corn, and corn reacts very sensitively to zinc. Experiments have shown that: Applying zinc fertilizer to corn, the yield per hectare increased by 8%-15%. Misunderstanding 6: Do not need top dressing after heading. Insufficient or inefficient use of basal fertilizer, the efficiency of top dressing after heading has been exhausted, and the nutrients in the soil cannot meet the growth needs of corn. This necessitates the application of some urea to prevent premature decay and promote grouting and grain filling. Increase grain weight. Excerpted from China Agricultural Press>
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