Recent trends in organic coating based on biopolymers and biomass for controlled and slow release fertilizers

Fertahi, Saloua; Ilsouk, Mohamed; Zeroual, Youssef; Oukarroum, Abdallah; Barakat, Abdellatif

doi:10.1016/j.jconrel.2020.12.026

Cited by 157 publications

(97 citation statements)

References 167 publications

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“…Therefore, researchers particularly engaged in businesses related to fertilizers are introducing new technologies for reducing N losses and improving NUE from applied urea [10]. Controlled N release from urea can increase the efficient use of fertilizer by plants, as well as reduce the negative effects that are damaging to the ecosystem [8,11,12]. A slow release urea fertilizer was purposely designed to release N in a controlled and delayed manner, one that could synchronize with plant N need [13].…”

Section: Introductionmentioning

confidence: 99%

“…Sulfur has the ability to decrease urea dissolution [30], is essential for crop growth, and can also decrease the alkalinity of the soil [10]. However, its non-uniform coating surface, low granular adhesion, wettability, and acidity causing nature makes it an ineffective coating material, prompting scientists to look for the alternative solutions to overcome sulfur coating associated problems [10,12]. Equally, the utilization of Zn as a coating material is also beneficial since this can also serve as a crop micronutrient and at the same time inhibit urease enzyme activity to slow release of N from urea fertilizer [29].…”

Section: Introductionmentioning

confidence: 99%

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Potassium Plus Biopolymer Coating Controls Nitrogen Dynamics of Urea in Soil and Increases Wheat Production

et al. 2021

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The low nitrogen utilization efficiency (NUE) of commercial fertilizers is one of the main hurdles in higher crop production and reduction of fertilizer N losses to the environment. However, interactions between most the macronutrients could have synergistic outcomes that affect crop NUE. The coating of urea with macronutrients and biopolymers may control N release and synergistically impact its crop NUE. In this study, urea was coated with 3% of different polymers, combined with 5% potassium iodide (KI) (i) Gum Arabica (GA + KI), (ii) polyvinyl alcohol (PVA + KI), and (iii) gelatin (Gelatin + KI) to control its N release, leaching, and increase of wheat NUE. Scanning electron microscopy, Fourier Transform Infrared spectroscopy (FTIR), and X-ray diffraction (XRD) analyses confirmed the successful coating of all KI and biopolymer combinations on urea granules. All coating combinations slowed down urea release in water and reduced its leaching from the soil, but the highest reduction in both parameters was observed with the GA + KI treatment, compared to the uncoated urea. After soil application, GA + KI decreased urea leaching by 26% than the uncoated urea in lysimeter. In the field, soil mineral N remained significantly high with the GA + KI and PVA + KI treatments at the wheat tillering, booting, grain filling and maturity stages, compared to the uncoated urea. However, K content was only high (28%) with the GA + KI treatment at final harvest. Likewise, microbial biomass N was only high with GA + KI at grain filling (20%) and maturity stages (24%) than the uncoated urea. Such synchronized N availability led to high wheat grain yield (28%), N (56%) uptake, and apparent N recovery (130%) with the GA + KI treatment, compared to the uncoated fertilizer. The increment in NUE with GA + KI could be due to the synergistic effect of K on N availability; therefore, we observed higher wheat yield and N utilization efficiency with this treatment. Hence, urea coated with macronutrient (K) plus biopolymer is recommended to improve wheat yield, NUE, and for reduction of environmental N losses.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Potassium Plus Biopolymer Coating Controls Nitrogen Dynamics of Urea in Soil and Increases Wheat Production

et al. 2021

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“…14 The nutrient losses to the environment caused health-associated risks, agronomic, economic, and environmental problems. 14,15 Therefore, efforts are made to specially synthesized slow or controlled release fertilizers for synchronizing the nutrients release from fertilizer to meet the plant sequential needs. 15,16 These controlled release fertilizers are designed to enhance crop nutrient utilization efficiencies and yields with minimum losses of the nutrients to the environment.…”

Section: Introductionmentioning

confidence: 99%

“…14,15 Therefore, efforts are made to specially synthesized slow or controlled release fertilizers for synchronizing the nutrients release from fertilizer to meet the plant sequential needs. 15,16 These controlled release fertilizers are designed to enhance crop nutrient utilization efficiencies and yields with minimum losses of the nutrients to the environment. 15,17 Fertilizer coating is among the most practiced techniques for controlled release fertilizers production, therefore a variety of coating materials are developed to date.…”

Section: Introductionmentioning

confidence: 99%

“…15,16 These controlled release fertilizers are designed to enhance crop nutrient utilization efficiencies and yields with minimum losses of the nutrients to the environment. 15,17 Fertilizer coating is among the most practiced techniques for controlled release fertilizers production, therefore a variety of coating materials are developed to date. 18 Sulfur was tested as the first material for coating urea fertilizer to control its dissolution rate.…”

Section: Introductionmentioning

confidence: 99%

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Novel water‐soluble polymer coatings controlNPKrelease rate, improve soil quality and maize productivity

Akhter

Shah

Niazi

et al. 2021

J of Applied Polymer Sci

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We investigated different combinations of polymers (5% each) (i) starch, gelatin (polymer coating; PC-1), (ii) polyvinyl alcohol (PVA), gum Arabica (PC-2), (iii) PVA, gelatin (PC-3), (iv) starch, gum Arabica (PC-4), (v) gelatin, gum Arabica (PC-5), (vi) starch, PVA (PC-6), for coating NPK (17, 17:17) in a fluidized bed granulator. Morphological characterization indicated a uniform coating of all formulations on NPK granules. A slow release of N (PC-3), P (PC-6), and K (PC-3) was observed in water. In soil, high mineral N (63%), plantavailable P (72%), and K (24%) were observed in PC-3, PC-5, and PC-6, respectively than uncoated fertilizer. Microbial biomass NPK was also higher in these treatment. This resulted in higher maize yield (66%), N (114%), P (164%), and K (137%) uptakes and apparent N (267%), P (196%), and K (358%) recoveries from applied fertilizer in these treatments. Among these, PC-3 resulted in an increase of 115% shoot N, 169% P and 138% K uptakes and 268% apparent N, 206% P and 361% K recoveries than uncoated fertilizer. Hence, coating of NPK with this biodegradable polymer combination controlled N, P, and K release and synchronized these nutrients availabilities with maize nutrients demand therefore resulted in higher maize crop yield and nutrient utilization efficiencies.

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Lignin nanoparticles filled chitosan/polyvinyl alcohol polymer blend as a coating material of urea with a slow‐release property

Elhassani

Gharrak

Essamlali

et al. 2023

J of Applied Polymer Sci

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The present study aims to develop a novel waterborne chitosan‐based coating formulation for slow‐release urea fertilizer. Coating formulations were elaborated by blending chitosan (Cs) and polyvinyl alcohol (PVA) (50/50, wt/wt) followed by the addition of lignin nanoparticles (LNPs) at various loadings (1, 2, 3, and 5 wt% LNPs) to yield viscous coating formulations. Formulations were cast to obtain coating films on which several structural, thermal, morphological, mechanical, and physicochemical characterizations were performed. Results showed that the Cs/PVA‐LNPs (3%) formulation exhibited suitable physicochemical characteristics in terms of the hydrophobic–hydrophilic balance, reduced water vapor permeability, and tolerated elasticity making it suitable to be used for fertilizer coating. Urea granules were coated by Cs/PVA and Cs/PVA‐LNPs formulations under controlled spraying and drying conditions until a good adhesion between the fertilizer and coating was obtained. Coated granules showed a good slow‐release N property over time and results indicated that the incorporation of LNPs was beneficial since its prolonged the longevity of the coated urea fertilizer up to 18 days compared to 5 days for the neat Cs/PVA. Hence, the proposed nanocomposite system showed great potential to be used as a coating material to produce a new slow‐release N fertilizer for sustainable crop production.

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Recent trends in organic coating based on biopolymers and biomass for controlled and slow release fertilizers

Cited by 157 publications

References 167 publications

Potassium Plus Biopolymer Coating Controls Nitrogen Dynamics of Urea in Soil and Increases Wheat Production

Potassium Plus Biopolymer Coating Controls Nitrogen Dynamics of Urea in Soil and Increases Wheat Production

Novel water‐soluble polymer coatings controlNPKrelease rate, improve soil quality and maize productivity

Lignin nanoparticles filled chitosan/polyvinyl alcohol polymer blend as a coating material of urea with a slow‐release property

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