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Scientific use of nitrogen fertilizer synergist
The addition of nitrification inhibitors to common nitrogen fertilizers and nitrogen-containing compound fertilizers is called stabilizing fertilizer. Nitrification inhibitors are commonly called “nitrogen fertilizer synergistsâ€. The following three kinds of common nitrification inhibitors. The suitable amount of nitrogen-pyridine is about 1% of pure nitrogen. It has a significant inhibition effect on soil nitrification when the soil concentration is 1-100 mg/l, and the effective period is 30 days. Nitrogen-pyridine has the effects of increasing yield or reducing fertilizer in crops such as rice, corn, wheat, sorghum, cotton, and rape, but has inhibitory effects on the growth and development of leguminous crops. Dicyandiamide Ammonium in fertilizers can be stabilized for 6-8 weeks under the influence of dicyandiamide. Fertilizers containing dicyandiamide can be applied to most crops. Nitrogenous fertilizers include ammonium sulfate, ammonium nitrate, urea and ammonium nitrate. The amount of dicyandiamide is preferably 5% to 10% of the total nitrogen. Within one month after application, soil microorganisms were significantly inhibited and returned to normal after two and a half months. Dicyandiamide is both a synergist and a slow-acting nitrogen fertilizer. The application of 3,4-dimethylpyrazole phosphate in potato, summer maize and other crops has achieved initial nitrogen-saving production. There are a wide variety of products containing nitrogenous fertilizer synergists in the current agricultural resources market. When selecting, reference should be made to the results of field trials and the quality of products. And pay attention to whether the safety of humans and animals, no harm to the seedlings, soil and other beneficial microorganisms rhizobia side effects. Manufacturers should indicate the type of nitrification inhibitor, the amount of nitrification inhibitor, and the amount of nitrogen fertilizer in the product packaging bag. Different kinds of nitrogen fertilizer synergists are suitable for different amounts, some of which are 0.25%, and some are 0.7% to 1%. The effect of nitrogen fertilizer synergists varies greatly depending on the application conditions. For example, most of the irrigated food crops have increased production, while the fertilizer efficiency of vegetable crops is uncertain, and most legume crops have reduced their yields. The application of soil conditions to paddy fields was better than that of dry land.