Preparation method of slow-release water-soluble fertilizer

Abstract

The invention discloses a preparation method of a slow-release water-soluble fertilizer, the slow-release water-soluble fertilizer comprises, by mass, 78%-80% of ammonium dihydrogen phosphate, 6%-8% of potassium sulfate, 8%-10% of amino acid, 2%-3% of a slow-release material, 3.5%-5% of a binder and 2.5%-4% of a cross-linking agent, the water-soluble fertilizer ammonium dihydrogen phosphate prepared by the device is acidic in soil, is better than calcium superphosphate and ammonium sulfate in acidic soil, and has a good slow-release effect. The amino acid is added, the amino acid is a natural growth active substance, has multiple effects of relieving phytotoxicity, increasing yield and guaranteeing quality, balancing nutrition, obviously protecting roots, enhancing resistance, inhibiting salt and alkali and the like, does not cause any damage to the environment, can also improve the soil and increase the pH value of the acid soil, and has a good application prospect. And nutrition loss and environmental pollution are not caused, and the method is suitable for popularization and application.

Description

technical field [0001] The invention relates to the field of water-soluble fertilizers, in particular to a preparation method of slow-release water-soluble fertilizers. Background technique [0002] Slow-release fertilizers are the future development trend. Slow-release fertilizers can release nutrients in slow-release fertilizers at different slow-release times according to different growth cycles of crops, so as to accurately control the release of nutrients from fertilizers and synchronize the absorption of nutrients by crop growth, which can ultimately reduce the use of fertilizers. The dosage can enhance the quality of crops. Water-soluble fertilizer has the advantages of instant dissolution, high absorption rate, quick effect, no residue, and convenient use. It can save water, fertilizer, and labor through drip irrigation and fertilization integrated with water and fertilizer. However, water-soluble fertilizers are prone to leakage and loss in the soil, causing nutrien...

AI Technical Summary

Problems solved by technology

[0002] Slow-release fertilizers are the future development trend. Slow-release fertilizers can release nutrients in slow-release fertilizers at different slow-release times according to different growth cycles of crops, so as to accurately control the release of nutrients from fertilizers and synchronize the absorption of nutrients by crop growth, which can ultimately reduce the use of fertilizers. The dosage can enhance the quality of crops. Water-soluble fertilizer has the advantages of instant dissolution, high absorption rate, quick effect, no residue, and convenient use. It can save water, fertilizer, and labor through drip irrigation and fertilization integrated with water and fertilizer. However, water-soluble fertilizers are prone to leakage and loss in the soil, causing nutrient loss and environmental pollution

[0003] Patent 200910027502.2 uses starch and its derivatives as a slow-release material coating. Although the coating is an environmentally friendly coating, this environmentally friendly coating material is soluble in water, resulting in poor slow-release effect, and does not have Balanced nutrition, enhanced resistance, inhibition of salinity and other multiple effects, a slow-release water-soluble fertilizer preparation method is needed to solve this problem