Long-acting urea contains hydroquinone, which has an inhibitory effect on the decomposition of nitrogen in urea. In the early stages of corn growth, the inhibitory effect is large. With the gradual depletion of hydroquinone, the inhibitory effect is gradually weakened, and after 70 days of application, urea decomposition returns to normal. . At this time, the period of maize needs to increase the amount of fertilizer after jointing, which satisfies the demand for nitrogen, and basically realizes that the crop needs fertilizer and long-acting urea and nitrogen is released simultaneously. In this way, the nitrogen fertilizer needed before maize emergence and jointing can be reduced, and less normal urea nitrogen can not be utilized due to the normal decomposition of nitrogen. Normal fertilizer efficiency can be used in the later period to extend the fertilizer effect period and meet the needs of corn, thus improving nitrogen utilization. rate. From the production point of view, the long-acting urea maize growth trend was slightly lower than that of the plants with normal urea. There are significant differences in the later period. According to a multi-point survey during maturity, the plant height was 24.9 cm lower than that of normal urea, and stem diameter was increased by 0.29 cm; the most obvious was that the area of ​​green leaves was more at maturity, with an average of 1.9 leaves and an area of ​​362.7 cm2. It is particularly prominent on sandy soils. The reason for this is that the poor soil fertility of sandy soils, the serious leakage loss, the slow release of long-acting urea nitrogen application, the reduction of losses, and the improvement of the utilization rate. The long-acting urea plant has large leaf area, increased photosynthesis area, favorable nutrient production and accumulation, and lays a foundation for increasing production. The ear length was 1.3 cm more than that of ordinary urea, and the 100-grain weight was increased by 1.5 grams, which had a significant effect on yield increase.
Long-acting urea should pay attention to three points in the promotion and application:
1. Long-acting urea can be applied in brown soil, meadow soil, aeolian sand and other types of soil in corn fields, but attention should be paid to the content of hydrogenated thorium, and the high-viscosity, high-fertility plots should use high content. , on the contrary, use low-specification products.
2. When applying long-acting urea, it is necessary to pay attention to the seed and fertilizer isolation layer and implement the bottom deep application. Keep a distance of 5 cm or more from the seed to prevent the seedlings from affecting the seedlings.
3. The amount of long-acting urea must be used in accordance with the amount, the amount of fertilizer should be given enough, generally 30 kg per mu, to prevent defertilization can not reach high yield and high efficiency.
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Corn (Maize) is cultivated throughout China. It is also widely grown in tropical and temperate regions of the world and is an important cereal. With yields of up to 700-900 kg per mu, maize is one of the more productive grains.
Corn is rich in nutrients, with protein, body fat, tapioca starch, vitamin B1, vitamin B2, vitamin B6, vitamin A, vitamin E, carotene, methyl cellulose and calcium, phosphorus and iron. Corn is a good source of vitamin C, which can help boost the immune system and help fight cancer. Compounds found in corn have been shown to reduce the risk of cardiovascular disease. According to research, fresh corn contains 4-5 times more body fat than rice and flour, and contains unsaturated fat, of which 50% are fatty acids, which inhibit the digestion and absorption of cholesterol. It is an excellent medicine for long-term use to reduce blood cholesterol and soften blood vessels, making it an ideal vegetable oil for patients with hypertension, coronary heart disease, obesity and the elderly.
Corn is also a cereal and low-fat food. Researchers have found that a low-fat diet has no significant effect on the risk of several diseases. In past follow-ups, a low-fat diet was found to provide significant and sustainable health benefits.
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