A farmer from Fuyang, Anhui Province, told the story of two fertilization methods that produced different results in the summer maize planting.
After harvesting wheat in early June last year, the farmer couldn’t turn over the ground to plaster the summer corn. The two lands he and his parents are responsible for are adjacent. Although the manure was bought by him as a compound fertilizer with a total content of 40%, including 20% ​​of nitrogen, 12% of phosphorus, and 8% of potassium, the management of fertilization in these two plots was different. He transported the compound fertilizer directly to the ground and used 30 kg per acre. He applied it once at the bottom of the sulcus and did not cover the soil. He waited for rain, and it rained the next day. The weather was fine, and there were many undissolved fertilizer granules, leaving a grayish residue on the soil, but he had already gone to work in the city.
In the neighboring plot, his parents did not apply fertilizer according to his methods. Only 15 kilograms of compound fertilizer was applied per acre. The method of fertilization was different. When summer corn grows until the trumpet period, they also topped 10 kilograms of urea.
By the time corn was harvested, the yields of the two plots in the two different fertilization methods differed by half. The peasant did not understand that he had no shortage of fertilizer, no money spent, and how could he produce so much?
Expert Comments: From this case it can be clearly seen that the method of fertilization is different and the effect is very different. It is right to use granular compound fertilizer as a base fertilizer for deep application, but it cannot be applied to the surface of the earth, because the fertilizer on the surface of the earth cannot be washed even if it is filled with water or rain. Nitrogen's personality is too lively and it is easy to lose. The personality of phosphorus is too lazy to move in the soil, leaving the roots of corn out of reach. The utilization of nitrogen and phosphorus nutrients is very low. However, the fertilization method of the neighboring plots is counter-fertilizer, and the fertilisers are all put up.
On the other hand, from the point of fertilization, for the summer maize, it is not as good to apply basal fertilizer and top dressing separately. Compound fertilizer as base fertilizer, chasing nitrogen fertilizer during the bell, the effect is good. Especially in the summer and autumn high temperature season, the application effect is not good, waste is much, and the utilization rate is low.
Case Tip: In the summer corn fertilization, sub-basal fertilizer and top dressing twice the efficiency of high application. Granular compound fertilizers cannot be applied to the surface, causing large losses and low utilization rates. (Author: Cao Yiping)
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