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Common nitrification inhibitors are listed below: Nitrogen-pyridine, code CP, trade name N-Serve. Nitrification inhibitors in US farms tend to use nitrogen fertilizer plus nitrification inhibitors or spring nitrogen fertilizers plus nitrification inhibitors. Crops are commonly used in corn, sorghum and wheat. The optimum amount of nitrogen-pyridine is about 1% of the active ingredient of nitrogen fertilizer. When it is 1-100ppm in soil, it has obvious inhibitory effect on soil nitrification, and the effective period is 30 days. Experiments conducted by the Chinese Academy of Agricultural Sciences in the 1980s showed that crops such as rice, corn, wheat, sorghum, cotton, rubber, and rapeseed had the effect of increasing yield or reducing fertilizer. However, both domestic and foreign experiments have shown that it has an inhibitory effect on the growth and development of legumes. For example, continuous application has residual toxic effects on soybeans, and soybeans have a tendency to reduce production.
Dicyandiamide, codenamed DCD. Under the influence of dicyandiamide, the ammonium in the fertilizer can be stabilized for 6-8 weeks. The length of the stabilization time depends on the total amount of nitrogen applied and the proportion of dicyandiamide added, in addition to soil temperature and humidity. Fertilizers added with dicyandiamide can be applied to most crop types. Nitrogen-containing fertilizers include ammonium sulfate, ammonium sulphate, urea, and ammonium nitrate. The appropriate ratio is that the nitrogen of dicyandiamide accounts for the total nitrogen. 5%-10%. Within one month after application, it had a significant inhibitory effect on soil microorganisms and returned to normal after two and a half months. The application rate is 10% of the amount of nitrogen fertilizer (based on the active ingredient). Dicyandiamide is both a synergist and a slow-acting nitrogen fertilizer.
3,4-Dimethylpyrazole phosphate, code DMPP, trade name "Entek". After the application test on potato, summer corn, banana and other crops, the effect of nitrogen production increase has been initially achieved.
In recent years, such stable fertilizers have developed rapidly, and there are many names on the market. Farmers' friends often ask about the application principles of such fertilizers, which are summarized as follows:
The first thing to understand and choose. The production enterprise should truthfully indicate on the product packaging bag, and cannot be false. Such as indicating the type of nitrification inhibitor, the amount of addition, the amount of nitrogen fertilizer. Because there are suitable addition amounts for different types, some ratios are 0.25%, and others are 0.7%-1%.
The effects of nitrogen fertilizer synergists vary greatly depending on the conditions of application. For example, most of the food crops in irrigated land have increased production, while the fertilizer efficiency of vegetable crops is uncertain, and most of the legume crops have reduced production. The application of soil conditions in paddy fields is superior to that in dry land and so on.
At present, there are many kinds of products in the agricultural capital market, and what kind of farmers' friends choose, in general, must be considered from two aspects. First, we must refer to the field test results, the quality of the product. Second, we must pay attention to whether it is safe for humans and animals, and it is not harmful to seedlings; it has less side effects on beneficial microorganisms such as soil rhizobia.
How to use nitrogen fertilizer synergist
The addition of nitrification inhibitors to common nitrogen fertilizers (including ammonium, ammonia, urea) and nitrogen-containing compound fertilizers is called stable fertilizer, and nitrification inhibitors are commonly known as “nitrogen fertilizer synergistsâ€. It can be seen that the nitrification inhibitor is a kind of substance which can improve the stability of ammonium and urea, thereby increasing the efficiency of nitrogen fertilizer.
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