High nitrogen compound fertilizer and preparation method thereof

Abstract

The invention relates to a high nitrogen compound fertilizer and a preparation method thereof. The high nitrogen compound fertilizer is prepared from, by weight, 5-10 parts of ammonium sulfate, 2-4 parts of ammonium chloride, 3-5 parts of ammonium bicarbonate, 5-10 parts of urea, 2-4 parts of calcium cyanamide, 5-7 parts of potassium magnesium fertilizer, 8-10 parts of plant ash, and 70-80 parts of straw fermentation substance. The high nitrogen compound fertilizer is prepared into granular fertilizer, wherein the granular fertilizer is divided into an inner layer and an outer layer, the outer layer comprises straw fermentation substance; ammonium sulfate, ammonium chloride, ammonium bicarbonate, urea, calcium cyanamide, potassium magnesium fertilizer and plant ash are located in the inner layer. The high nitrogen compound fertilizer can avoid the nutrient loss of the fertilizer due to irrigation, thereby ensuring the nutrients in cultivation, at the same time, avoiding the pollution of downstream water quality.

Description

technical field [0001] The invention relates to the biological field, in particular to a high-nitrogen compound fertilizer and a preparation method thereof. Background technique [0002] Vegetable production is a highly intensive planting system, and excessive application of fertilizers is a common phenomenon. Due to the high planting efficiency, vegetable farmers use super-high amounts of nitrogen and phosphorus fertilizers in order to pursue benefits. The average pure nutrient consumption of single-season crops is 569-2000kg / hm2, which is several times or even dozens of times that of ordinary field crops. Many studies have shown that long-term and large-scale application of nitrogen and phosphorus fertilizers will lead to excessive accumulation of nitrogen and phosphorus nutrients in the soil. Excessive soluble nutrients in vegetable field soil enter the environment through farmland surface runoff, drainage, and underground seepage, resulting in eutrophication of groundwa...

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Problems solved by technology

[0003] Aiming at the problems that long-term excessive fertilization has caused the soil environment quality to deteriorate in many vegetable fields, excessive nitrogen and phosphorus enrichment in vegetable fields has led to a large amount of leaching loss, and caused eutrophication of water quality in some areas, many treatment methods have been proposed in the prior art

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