A Novel, Simple Route to Produce Urea:Urea–Formaldehyde Composites for Controlled Release of Fertilizers

Giroto, Amanda S.; Guimarães, Gelton Geraldo Fernandes; Ribeiro, Cauê

doi:10.1007/s10924-017-1141-z

Cited by 21 publications

(22 citation statements)

References 25 publications

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“…On the other hand, the remarkable delayed release is due to the urea-formaldehyde polymer structure, which needs to be disrupted to further solubilize urea. However, urea-formaldehyde polymer displays hydrophobic characteristics and may have acted as a structural barrier against diffusion of water molecules, consequently resulting in an expressively slower urea release, according to Giroto et al (2018).…”

Section: Resultsmentioning

confidence: 99%

Analysis of NH3-N Slow Release systems for fiber digestibility of low-quality forage: in vitro approach

Cruz

Pereira

Sato

et al. 2020

Sci. agric. (Piracicaba, Braz.)

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Urea is a common non-protein supplement used in ruminant feed; however, excessive consumption may lead to poisoning by NH 3. Although the slow release of urea into the rumen has shown to be an essential aspect for ruminant feed, to date only a few studies have addressed this matter. In this study we examined the influence of five different NH 3-N slow release systems based on clay-urea nanocomposites on the fiber digestibility of low-quality forage (sugarcane straw) in vitro. Physical properties of nanocomposites were evaluated and their effects on digestibility were tested in vitro using pristine urea as a positive control (level of 1 % of DM of sugarcane straw sample) and sugarcane (with no additives) as a negative control. Ammonia release and digestibility were evaluated at 12, 24, 36, 48, 72 and 96-h. Generally, all nanocomposites increased (p < 0.05) digestibility of fiber over control under all the conditions stipulated, but the samples with hydrogel content were more expressive. We concluded that an ideal release rate and optimum environment for microbial synthesis are necessary to maximize the digestion of sugarcane.

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Section: Resultsmentioning

confidence: 99%

Analysis of NH3-N Slow Release systems for fiber digestibility of low-quality forage: in vitro approach

Cruz

Pereira

Sato

et al. 2020

Sci. agric. (Piracicaba, Braz.)

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“…Studies about this material show that the release in soil incubation is directly dependent on the PF fraction in starting mixture, giving that this simple strategy may provide N slow release fertilizers with minimal processing. 102 This also suggests that the nutrient source, in that case urea, can be treated alone as a matrix, where the loading of other particles would behave in the same way of polymer composites or nanocomposites. Therefore, some effects typically seen in composites and blends could be used to finely control the nutrient release not only by the chemical structure but also by micro and nanostructure.…”

Section: Fertilizer Compositesmentioning

confidence: 99%

Why nonconventional materials are answers for sustainable agriculture

Ribeiro

2019

MRS Energy & Sustainability

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“…Thousand-grain weight/g Total yield/(kg•hm-2) Compare to CK/(%) Compare to UF/(%) 1 (I) 614 ± 4bc 387. 4…”

Section: Grain Number Per Earmentioning

confidence: 99%

“…Urea formaldehyde (UF) slow release fertilizer is condensation product formed by the reaction of urea and formaldehyde, which release of nitrogen mainly occurs by the enzyme attack [1][2][3][4]. It is particularly utilized in flowers, decorative plant, lawn fertilization, and in high-value cash crops and vegetables [5].…”

Section: Introductionmentioning

confidence: 99%

Soybean protein hydrolysate-formaldehyde-urea block copolymer for controlled release fertilizer

Liu

Huang

et al. 2019

Environmental Pollutants and Bioavailability

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Urea formaldehyde (UF) was modified by the soybean protein hydrolysate (SPH) to adjust the rate of nitrogen, phosphorus, and potassium (NPK) release. The SPH section can copolymerize into the UF molecules. The crystallinity of modified UF fertilizer decreased with increasing SPH content. The surface of SPH-modified UF fertilizer was loose and porous. The nitrogen content of SPH-modified UF fertilizer decreased a little, but the nitrogen, phosphorus and potassium release rate was improved with increasing SPH content in modified fertilizer. The grain number per ear, thousand-grain weight and total yield were improved by the SPH-modified UF fertilizer. Compared to UF and control, protein, starch, fat, soluble sugar and vitamin C in the maize were increased by applying SPH-modified UF fertilizer. The results indicated that the nutrient release behavior can be adjusted by the introduced SPH to match the maize needs.

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A Novel, Simple Route to Produce Urea:Urea–Formaldehyde Composites for Controlled Release of Fertilizers

Cited by 21 publications

References 25 publications

Analysis of NH3-N Slow Release systems for fiber digestibility of low-quality forage: in vitro approach

Analysis of NH3-N Slow Release systems for fiber digestibility of low-quality forage: in vitro approach

Why nonconventional materials are answers for sustainable agriculture

Soybean protein hydrolysate-formaldehyde-urea block copolymer for controlled release fertilizer

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