Acid-controlling nitrogen-saving fertilizer for red upland soil and fertilization method

Abstract

The invention provides an acid-controlling nitrogen-saving fertilizer for red upland soil. The fertilizer comprises dicyandiamide and a nitrogen fertilizer, wherein the mass of the dicyandiamide is 5-7 percent of the mass of the nitrogen fertilizer. According to the acid-controlling nitrogen-saving fertilizer for the red upland soil provided by the invention, the mass of the dicyandiamide is 5-7 percent of the mass of the nitrogen fertilizer, the ratio refers to the result obtained by comprehensively considering the effects of dicyandiamide on the nitrogen fertilizer utilization rate and the acid control effect, and according to the ratio, the dicyandiamide can achieve obvious nitrogen-saving and acid-controlling aims, the pH value of the red upland soil can be effectively improved, and the exchangeable acids of the soil are reduced. In addition, the invention also provides an acid-controlling nitrogen-saving fertilization method for the red upland soil. The method comprises the following steps: step 1, mixing the nitrogen fertilizer and the dicyandiamide which accounts for 5-7 percent of the mass of the nitrogen fertilizer under shading conditions, and uniformly stirring; step 2, ploughing grooves on the land, and spreading the nitrogen fertilizer and the dicyandiamide which are uniformly stirred in the step 1 into the grooves; and step 3, raking the land, and burying the fertilizer under the ground.

Description

technical field [0001] The invention belongs to the field of fertilizers, and relates to an acid-controlling and nitrogen-saving fertilizer and a fertilization method for red soil dry land. Background technique [0002] Red soil dryland generally has problems such as low nitrogen fertilizer use efficiency and aggravated soil acidification. A large number of long-term positioning experiments have proved that the nitrification of ammonium nitrogen and the leaching of nitrate nitrogen after nitrogen fertilizers are applied to the soil will lead to a decrease in nitrogen fertilizer use efficiency. And aggravate soil acidification, seriously restricting the productivity of red soil dryland. Many studies have shown that the application of amendments such as lime, bio-black carbon, and alkaline conditioners can significantly increase soil pH and increase crop yields. For example, if 200kg of lime is applied per mu, the acidity of the surface soil will be significantly reduced afte...

AI Technical Summary

Problems solved by technology

Domestic technical patents for improving acidic soils mainly involve the combination of organic non-metallic minerals such as zeolite, calcium silicate, serpentine, malachite, etc. Larger, more expensive, single access, cumbersome application methods, etc., so it is difficult to be accepted by farmers and promoted on a large scale

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