Slow release fertilizer applicable to water-fertilizer integration and preparation method thereof

Abstract

The invention discloses a slow release fertilizer applicable to water-fertilizer integration. The slow release fertilizer is a nano capsule slow release fertilizer prepared from nutritional ingredients as core materials and a slow soluble film-forming polymer as a capsule wall material. The slow release fertilizer can be evenly dispersed into the water to form a colloidal solution and achieves the slow release and controlled release targets. The invention further provides a preparation method of the slow release fertilizer. The method comprises the following steps: dissolving the slow soluble film-forming polymer into an organic solvent which is not mixed and dissolved with the water; dispersing a core material water solution into the organic solvent to form a water-in-oil W/O emulsion; and adding the W/O emulsion to the water solution containing protective colloid to disperse, so as to form a W/O/W emulsion, and then evaporating a solvent, so as to form the nano capsule. The slow release fertilizer can be evenly dispersed into water to form the colloidal solution, and can be irrigated together with water; and the capsule wall material is a slow soluble film-forming polymer, and can be slowly dissolved into soil to achieve the controlled release target, secondary pollution to the soil is not generated, and the slow release fertilizer has market function value.

Description

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AI Technical Summary

Benefits of technology

This patented technology describes combining two types of components: one acts like both liquor solvents (water) and control release agents that gradually releases their contents over several hours or days after being applied onto plants' roots. Another component called poly(vinyl alcohol)) helps keep it from breaking down too quickly by creating tiny particles when wetting them on top. These small particles help deliver certain ingredients into root systems more efficiently through absorption than other methods such as liquid injection. Overall this combination allows for precise dosage and delivery of various beneficial chemical compounds while minimizing environmental impact during farming operations.

Problems solved by technology

This patent describes various technical measures aimed at improving the efficiency and usability of existing hydraucal fertilants (HSC) such as liquid ameliorators and slow receptors. These improvements include decreased dosages due to their small sizes, less efficient usage of pesticides during crop rotation, slower release from hydrophobically solvent treated fertils compared to traditional ones, and improved stability over long periods without excessive weight loss. Additionally, there may exist other ways to integrate both water and agriculess sources like seawater desalination systems and greenhouse gas emission controls.