Preparation and Properties of a Slow-Release Membrane-Encapsulated Urea Fertilizer with Superabsorbent and Moisture Preservation

By M. Guo, Mingzhu Liu, and Falu Zhan, Lan Wu. 2005

160 citations recorded by the source corpus.

A slow-release membrane-encapsulated urea fertilizer with a superabsorbent and moisture preservation was prepared by cross-linked starch (the first layer), acrylic acid (AA) and acrylamide (the second layer; AM), ammonia, borax, urea, and so on. The variable affecting the water absorbency was investigated and optimized. The water absorbency of the product was 80 times its own weight if it was allowed to swell in tap water at room temperature for 80 min. Elemental analysis results showed that the product contained 26.74% nitrogen. The water retention property of the product and the slow-release behavior of nitrogen in the product were also investigated, and the results showed that the product not only had good slow-release property but also excellent water retention capacity. This will efficiently improve the utilization of fertilizer and water resources at the same time.

Subfields: Biomedical Engineering, Molecular Medicine, Water Science and Technology

View Paper: https://www.semanticscholar.org/paper/7296051c27e8d2b3f723f83118abc450062cfb60

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In Biomedical Engineering

In Molecular Medicine

In Water Science and Technology

Citations in the corpus

Review on materials & methods to produce controlled release coated urea fertilizer. (2014, methodology): “A similar release mechanism was presented by Guo [12], Liang [13], Liu [14], and Wu [15].”
A preliminary study of the incorparation of NPK fertilizer into chitosan nanoparticles (2010, unknown): “and to minimize environmental pollution [6, 7].”
A comprehensive review on biodegradable polymers and their blends used in controlled-release fertilizer processes (2015, methodology): “[Adopted from Guo et al. (2006), with copyright permission 2014 from John Wiley and Sons.”
Starch-based completely biodegradable polymer materials (2009, background): “However, due to surface runoff, leaching and vaporization, the fertilizers escape to environment to cause diseconomy and environmental problems [68, 69].”
Polymer in Agriculture: a Review (2008, background): “Guo et al. described another superabsorbent and release devices on the preparation for the slow-release membrane-encapsulated urea fertilizer with superabsorbent and moisture preservation (SMUSMP)[33].”
Superabsorbent hydrogels based on polysaccharides for application in agriculture as soil conditioner and nutrient carrier: A review (2015, methodology): “…[203]; (iii) alginate-based hydrogels in controlled NSO release [204]; (vi) crosslinked amide hydrogel as carrier for controlled urea release [205]; (v) controlled root targeted release of fertilizer using an ionically crosslinked carboxymethyl-cellulose hydrogel matrix [142]; (vi) sodium…”