Before using calcium ammonium nitrate fertilizer, it is necessary to understand what kind of chemical fertilizer calcium ammonium nitrate is. In rural areas, the use of calcium ammonium nitrate was more common in the last century, but today it is relatively rare and has been unknown to the new generation of farmers. In fact, calcium ammonium nitrate is an inorganic chemical fertilizer with very good properties.
Calcium ammonium nitrate is produced by mixing and melting ammonium nitrate and limestone or dolomite according to the ratio of 3:2, which can reduce the hygroscopic property of ammonium nitrate, so as to avoid the caking of ammonium nitrate, and avoid inconvenient and safety risks in use. Calcium ammonium nitrate is usually grayish-white or grayish-brown particles with a nitrogen content of 20 to 21%, of which 1/2 is nitrate nitrogen and 1/2 is ammonia nitrogen. Although the nitrogen content is much smaller than ammonium nitrate, it has better physical properties, absorbs less moisture, will not easily condense into hard pieces, and is very convenient and safe in storage and use. At the same time, calcium ammonium nitrate contains a large amount of calcium carbonate, which can be used on acidic soil to alleviate and reduce soil acidity and improve acidic soil. The application method of calcium ammonium nitrate is the same as that of ammonium nitrate, which should be applied deeply and covered with soil after application, not applied on the surface.
The use of calcium ammonium nitrate in grapes should be used as topdressing during the seedling period when grapes begin to sprout after the spring. Calcium ammonium nitrate is a mild nitrogen fertilizer, suitable for grape bud stage and long vine stage and the growth of branches and leaves when the main nutrient fertilizer. In the vegetative growth stage of grapes, what is needed is the main nutrients based on nitrogen fertilizer, which can promote the germination of grapes, the elongation of branches and vines, and the growth of young leaves. In addition, in the grape base fertilizer, an appropriate amount of calcium ammonium nitrate can be added to promote the basic nutrients of budding, solve the problem of late fertilizer application of grape seedlings, provide nitrogen source support, and promote the germination of young buds in early spring. Others in the fruit period of grapes, along with fruit fertilizer, appropriate application of appropriate amount of calcium ammonium nitrate, as the need for nitrogen nutrients required in the reproductive growth stage, is conducive to the growth and thickening of leaves, promote the photosynthetic ability of leaves, can promote the growth of roots, enhance the physiological function of roots.
In short, calcium ammonium nitrate is a mild nitrogen fertilizer, suitable for grape base fertilizer and seedling fertilizer and ancillary fertilizer in fruit and fruit period, suitable for deep application, not surface application.
