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Why is long-acting urea more significant than ordinary urea? Because long-acting urea contains hydroquinone, it has an inhibitory effect on the decomposition of nitrogen in urea, and it has a great inhibitory effect in the early stage of corn growth. With the gradual consumption of hydroquinone, the inhibitory effect is gradually weakened, and urea is decomposed after 70 days of application. Back to normal. At this time, the fertilizer needs to increase the amount of fertilizer after the jointing, which satisfies the demand for nitrogen, and basically realizes that the crop fertilizer needs to be synchronized with the long-acting urea. This can reduce the need for nitrogen fertilizer before the emergence of maize to the jointing, and the normal nitrogen decomposition of normal urea can not make use of the loss, the normal play fertilizer effect, the fertilizer effect period is extended, meet the needs of corn, and thus improve the nitrogen utilization. From the perspective of the growth trend of long-acting urea maize applied in production, the early stage was slightly lower than that of ordinary urea. There are significant differences in the later period. According to the multi-point survey at maturity, the plant height is 24.9 cm lower than that of common urea, and the stem diameter is increased by 0.29 cm. The most obvious is the green leaf area at maturity, with an average of 1.9 leaves and an area of ​​362.7 square centimeters. Especially outstanding. The reason is that the sandy soil has poor fertility and serious leakage loss. Slow application of long-acting urea nitrogen reduces the loss and improves the utilization rate. The plant area of ​​the long-acting urea is large, the photosynthesis area is increased, and the nutrient production is favorable. Accumulation has laid the foundation for increasing production. The ear length is 1.3 cm more than that of ordinary urea, and the 100-grain weight is increased by 1.5 g. The yield increase effect is remarkable.
Practice has proved that long-acting urea has the characteristics of labor saving, increased production and high efficiency due to deep application at one time. It is popular among farmers and should be promoted and applied in corn production. There are three points to note in promoting the application:
1 Long-acting urea can be applied in brown soil, meadow soil, wind-sand soil and other soil corn fields, but attention should be paid to the choice of hydrogenation content. For sites with good texture and good fertility, high content should be used. On the contrary, the product with a low content is selected.
2 When applying long-acting urea, we must pay attention to the seed and fertilizer isolation layer, and carry out the deep application, and keep the distance of 5 cm or more with the seeds to prevent the seedlings from affecting the whole seedlings.
3 The amount of long-acting urea must be measured according to the amount of fertilizer. The amount of fertilizer should be given to the foot. Generally, 30 kg per acre should be applied to prevent the high yield and high efficiency.
Corn application of long-acting urea to increase production
Long-acting urea is formed by adding a certain amount of urease inhibitor (hydroquinone) to ordinary urea during processing. This fertilizer was tested in a three-year plot and large-scale production in corn fields in 12 townships of Changtu County, all of which showed an increase in production. The long-acting urea has an average yield increase of 14.6% compared with ordinary urea (fertilizer + top dressing), and the yield increase range is 8.6%-25.1%; the long-acting urea at the bottom of the corn is increased by 16.6% compared with the ordinary urea. It is 11.4%-21.7%.
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