Biodegradable IPN Hydrogels Based on Pre-vulcanized Natural Rubber and Cassava Starch as Coating Membrane for Environment-Friendly Slow-Release Urea Fertilizer

Vudjung, Chaiwute; Saengsuwan, Sayant

doi:10.1007/s10924-018-1274-8

Cited by 53 publications

(32 citation statements)

References 42 publications

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“…In addition. these inorganic coating materials would also act as a source of secondary micronutrients for crops that is an added advantage [17]. This may be the reason that urea blends containing calcium, magnesium and sulfur are claimed to effectively enhance urea fertilizer efficiency [18].…”

Section: Introductionmentioning

confidence: 99%

Slow-Release Urea Prills Developed Using Organic and Inorganic Blends in Fluidized Bed Coater and Their Effect on Spinach Productivity

et al. 2020

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The application of urea-based fertilizers in developing countries has gained significant momentum over time. urea usage is to meet demand and supply gap of food resources as world population is increasing at a fast pace. urea contains largest content of nitrogen (46%) among all the solid nitrogenous fertilizers. However, main drawback of urea is its higher dissolution rate. After soil application, most of urea nitrogen is lost through a leaching, runoff, nitrification-denitrification and ammonia volatilization. To tackle urea related environmental pollution, development of slow-release urea fertilizer is a need of the hour and this would also increase product use efficiency in terms of crop productivity and its N uptake. We studied the usage of polymeric materials in combination with inorganic substances like sulfur and plaster of Paris as effective and biodegradable coating substances for urea prills. For coating on urea prills, fluidized bed coater was used whereas paraffin wax and molasses were used as binding agents. The urea was coated with four different formulations, i.e., C-1: PVA 5% + plaster of Paris 10% + sulfur 5% + paraffin wax 2%, C-2: PVA 5% + starch 10% + sulfur 5% + paraffin wax 2%, C-3: gelatin 5% + plaster of Paris 10% + sulfur 5% + paraffin wax 2% and C-4: PVA 5% + starch 10% + sulfur 5% + paraffin wax 2.5% + molasses 2.5%. Each formulation along with uncoated urea prills (C-0) were evaluated for characterization and N release kinetics. All the formulations along with uncoated urea were applied to spinach crop in pot experiment. A control (No N: untreated) was also kept. Spinach biomass yield and N uptake were determined. The formulation C-1 yielded highest urea-N release efficiency and spinach N uptake of6.87% and 1.93 g N/pot, respectively. Themodified Schwarz and Sinclair formula gave the excellent representation of release of nutrient-N from coated urea prills. It is concluded that coating urea prills with organic and inorganic blends is better option to slow down N release kinetics and improve spinach productivity. Therefore, by using coated fertilizers, farmers can improve agro-environmental value of urea, worldwide.

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Section: Introductionmentioning

confidence: 99%

Slow-Release Urea Prills Developed Using Organic and Inorganic Blends in Fluidized Bed Coater and Their Effect on Spinach Productivity

et al. 2020

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“…When the soil burial time was increased to 30 days, the surface of the film changed from smooth to rough, and some small holes appeared on the surface of the film. 48 The cause may be that some chains of poly(eugenol sulfone) have been degraded, causing skeleton cracking, or because some small molecules in poly(eugenol sulfone) escaped from the skeleton. With the extension of soil burial time, the surface and the interior became looser, and the holes gradually expanded and extended to the periphery and penetrated with other holes.…”

Section: Morphologies Of Coatingmentioning

confidence: 99%

Sustainable and Biodegradable Copolymers from SO₂ and Renewable Eugenol: A Novel Urea Fertilizer Coating Material with Superio Slow Release Performance

Liu

Zhi

et al. 2020

Macromolecules

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To enhance SO 2 utilization, improve fertilizer use efficiency, and minimize the negative environmental impact, the novel slow release sulfurcontaining urea fertilizers with good biodegradation performance were developed by coating with the sustainable poly(eugenol sulfone) derived from renewable eugenol and SO 2 . The poly(eugenol sulfone) was synthesized by a simple free radical polymerization under mild conditions, and structural features of the synthesized copolymers were studied by various characterization techniques. Characterization results revealed that the copolymers exhibited the strict alternating copolymerization structures containing OSO. A set of systematically designed experiments were carried out to determine the influences of the amount of initiator, reaction time, and reaction temperature on the molecular structure, release, and biodegradation behavior of the coated fertilizers. The obtained results proved that the coated fertilizers showed excellent release and biodegradation features. Moreover, the release and biodegradation rate of the coated fertilizers can be adjusted by changing the molecular weight of poly(eugenol sulfone). In addition, the kinetic study on the slow release characteristics of poly(eugenol sulfone)-coated fertilizers showed that the best fitting effect was obtained by the Ritger−Peppas equation. This work offers a simple and useful strategy for designing sulfur-containing urea fertilizers with excellent slow release and biodegradation performance and provides a new route for sulfur recycling. In the future, the fertilizer will be deeply tested to evaluate their impact on plant growth, chemical, and biological soil properties.

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“…More recently, novel materials such as modified biopolymers, nanocomposites and natural macromolecular materials have been investigated (Irfan et al, 2018, Trinh andKuShaari, 2016) in response to concerns about environmental pollution caused by polymers persisting in the environment (Azeem et al, 2014). Consequently, compounds such as starch (Qiao et al, 2016, Vadjung andSaengsuwan, 2018), lignin (Mulder et al, 2011, Rotondo et al, 2018, cellulose (Costa et al, 2013, Li et al, 2016, chitosan (Araujo et al, 2017, Wu andLiu, 2008) and various other naturally occurring elements (Ma et al, 2013b, Xie et al, 2012 have been investigated…”

Section: Bio-materials Fertilizers With Controlled-release Functionmentioning

confidence: 99%

“…Although not addressed in this PhD research, the retention of substantial portions of N in PCU granules may contribute to the adverse impacts of excessive N in natural ecosystems if persisting polymer 'shells' (Azeem et al, 2014) ultimately end up in these environments (Rios et al, 2007, Trenkel, 2010. Concerns over the persistence of the relatively degradationresistant polymer coatings have driven research and development of alternative fertilizer coatings (Araujo et al, 2017, Li et al, 2016, Rotondo et al, 2018, Vadjung and Saengsuwan, 2018 which may play a greater role in the controlled-release class of EEF technology in the future. The modified coatings are likely to exhibit different release characteristics to PCU and further research on their efficacy in banded application will be required.…”

Section: Polymer-coated Ureamentioning

confidence: 99%

“…In response to concerns about environmental pollution caused by polymer persisting in the environment (Azeem et al, 2014) a range of 'natural' and biodegradable coatings have been developed (Araujo et al, 2017, Li et al, 2016, Rotondo et al, 2018, Vadjung and Saengsuwan, 2018. These alternative coatings are likely to contribute significantly to controlled-release technology in the future.…”

Section: Determining N Release Characteristics and Fertosphere Modifimentioning

confidence: 99%

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The impact of banding urea and enhanced efficiency fertilizers on nitrogen transformations and the implications for nitrogen use efficiency in high-risk environments

Janke¹

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The efficient use of fertilizer-nitrogen (N) is a major global challenge for intensive agricultural systems. A suite of enhanced efficiency fertilizers (EEFs) have been developed in response to poor N use efficiency (NUE) in agriculture, but mechanistic understanding to support their effective utilization is not well developed. In particular, banding N-fertilizer creates a vastly different biochemical environment to broadcast and / or incorporated applications, potentially influencing the efficacy of EEFs. Furthermore, the influence of tropical and subtropical conditions on EEF efficacy is not well characterized. Thus, application of EEFs in cropping systems utilizing banded application and / or in (sub) tropical environments is occurring under conditions for which there is little guidance on effective use strategies. The effects of fertilizer-N from coastal cropping areas (i.e., sugarcane) of northeast Australia on nutrient-sensitive ecosystems of the Great Barrier Reef (GBR) is a prominent example of a high-risk environment in which effective utilization of EEFs may mitigate environmental impacts through improved on-farm NUE.The objective of this PhD research was to take a mechanistic approach to investigating the efficacy of banded EEF's in conditions typical of the (sub) tropical environment of the Australian sugarcane industry. The aim was to develop mechanistic understanding that would underpin agronomic advice supporting the effective utilization of banded EEFs in sugarcane and other high-risk agricultural systems.An initial laboratory incubation (Chapter 3) investigated the fertosphere (soil within ca.1-2.5 cm of the fertilizer band) impacts of various nitrification inhibitors (NIs) and a polymercoated urea (PCU) on urea-N release and hydrolysis, and the subsequent biochemical effects on N cycling, in a range of soils with varying physico-chemicals properties and under conditions typical of a tropical climate. Compared to standard urea, limited benefits from NIs were found within the fertosphere irrespective of soil type, as the hostile conditions associated with rapid hydrolysis of highly concentrated urea-N already had an inhibitory effect on nitrification. Within PCU bands, lower-than-expected concentrations of mineral N and the retention of significant portions of urea-N in granules led to a hypothesis that incomplete release of urea-N from banded PCU granules may be a result of the proximity of neighbouring granules causing diminished concentrations gradients. Batch-style diffusion studies were conducted (Chapters 4 -6) to better explore N distribution and transformation and the biochemical changes induced by banded EEFs beyond the fertosphere. Despite limited movement beyond the fertosphere, it was shown that the urease Financial support

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Biodegradable IPN Hydrogels Based on Pre-vulcanized Natural Rubber and Cassava Starch as Coating Membrane for Environment-Friendly Slow-Release Urea Fertilizer

Cited by 53 publications

References 42 publications

Slow-Release Urea Prills Developed Using Organic and Inorganic Blends in Fluidized Bed Coater and Their Effect on Spinach Productivity

Slow-Release Urea Prills Developed Using Organic and Inorganic Blends in Fluidized Bed Coater and Their Effect on Spinach Productivity

Sustainable and Biodegradable Copolymers from SO₂ and Renewable Eugenol: A Novel Urea Fertilizer Coating Material with Superio Slow Release Performance

The impact of banding urea and enhanced efficiency fertilizers on nitrogen transformations and the implications for nitrogen use efficiency in high-risk environments

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Biodegradable IPN Hydrogels Based on Pre-vulcanized Natural Rubber and Cassava Starch as Coating Membrane for Environment-Friendly Slow-Release Urea Fertilizer

Cited by 53 publications

References 42 publications

Slow-Release Urea Prills Developed Using Organic and Inorganic Blends in Fluidized Bed Coater and Their Effect on Spinach Productivity

Slow-Release Urea Prills Developed Using Organic and Inorganic Blends in Fluidized Bed Coater and Their Effect on Spinach Productivity

Sustainable and Biodegradable Copolymers from SO2 and Renewable Eugenol: A Novel Urea Fertilizer Coating Material with Superio Slow Release Performance

The impact of banding urea and enhanced efficiency fertilizers on nitrogen transformations and the implications for nitrogen use efficiency in high-risk environments

Contact Info

Product

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Sustainable and Biodegradable Copolymers from SO₂ and Renewable Eugenol: A Novel Urea Fertilizer Coating Material with Superio Slow Release Performance