Preparation and characterization of slow-release and water-retention fertilizer based on starch and halloysite

Wei, Hongliang; He, Wei; Chu, Huijuan; Li, Jingjing

doi:10.1016/j.ijbiomac.2019.04.183

Cited by 98 publications

(48 citation statements)

References 61 publications

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“…The use of biodegradable materials to coat urea not only reduces the environmental pollution but can also decrease the harmful effects associated with conventional coatings on the proper functioning of soil and plant ecosystems [29,30]. These bio-based materials currently used as coating of fertilizers include waste palm oil [28], animal manure lignin [31], cellulose [32] and starch [33][34][35], which can be used directly or after some modification or mixing with minerals [36,37]. These materials also slowed down N release from urea that could synchronize with crop N demand during the growing season [28,34,38].…”

Section: Introductionmentioning

confidence: 99%

“…These bio-based materials currently used as coating of fertilizers include waste palm oil [28], animal manure lignin [31], cellulose [32] and starch [33][34][35], which can be used directly or after some modification or mixing with minerals [36,37]. These materials also slowed down N release from urea that could synchronize with crop N demand during the growing season [28,34,38]. Despite some advantages of bio-based/natural product polymer coating, the urea coated by these bio-based materials possesses poor control of nutrient release property.…”

Section: Introductionmentioning

confidence: 99%

“…Zinc was used as a micronutrient, which was incorporated into these bio-plastic matrices to improve product value [42]. Most of the recent studies on natural materials like rice straw and rice husk used one coating material or modified the coating by mixing it with minerals [11,28,[31][32][33][34]43,44]. Few studies were also conducted on protein hydrolysate, which has received increasing attention due to its positive effects on plant development.…”

Section: Introductionmentioning

confidence: 99%

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Biodegradable Polymer Coated Granular Urea Slows Down N Release Kinetics and Improves Spinach Productivity

et al. 2020

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Low nitrogen (N) utilization efficiency due to environmental N losses from fertilizers results in high-cost on-farm production. Urea coating with biodegradable polymers can prevent these losses by controlling the N release of fertilizers. We calculated N release kinetics of coated granular with various biodegradable polymeric materials and its impact on spinach yield and N uptake. Different formulations were used, (i) G-1: 10% starch + 5% polyvinyl alcohol (PVA) + 5% molasses; (ii) G-2: 10% starch + 5% PVA + 5% paraffin wax (PW); (iii) G-3: 5% gelatin + 10% gum arabic + 5% PW; (iv) G-4: 5% molasses + 5% gelatin + 10% gum arabic, to coat urea using a fluidized bed coater. The morphological and X-ray diffraction (XRD) analyses indicated that a uniform coating layer with no new phase formation occurred. In the G-2 treatment, maximum crushing strength (72.9 N) was achieved with a slowed-down N release rate and increased efficiency of 31%. This resulted in increased spinach dry foliage yield (47%), N uptake (60%) and apparent N recovery (ANR: 130%) from G-2 compared to uncoated urea (G-0). Therefore, coating granular urea with biodegradable polymers is a good choice to slower down the N release rate and enhances the crop yield and N utilization efficiency from urea.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Biodegradable Polymer Coated Granular Urea Slows Down N Release Kinetics and Improves Spinach Productivity

et al. 2020

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“…Hydrogels are hydrophilic three‐dimensional (3D) networks, which possess the ability to imbibe and hold a large quantity of water or aqueous solutions [19]. Because of their specific properties, hydrogels have found applications in multiple sectors such as medicine [20], agriculture [21], water treatment [22, 23], antimicrobial materials [24], contact lens [25], biosensors [26], and artificial skin [27]. Especially, smart hydrogels, which can respond to the external chemical and physical stimuli (light, pH, heat, ion strength, CO 2 , etc.…”

Section: Introductionmentioning

confidence: 99%

Preparation and Characterization of Thermal and pH Dual Sensitive Hydrogel Based on 1,3‐Dipole Cycloaddition Reaction

Wei

Liu

Zhu

et al. 2020

Polymer Engineering & Sci

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In this study, thermal and pH dual sensitive hydrogels were prepared via Cu-free 1,3-dipole cycloaddition between two copolymers which were modified by azide and maleimide functional groups, respectively. First, the thermally sensitive terpolymers were fabricated via conventional free-radical polymerization of N-isopropylacrylamide, hydroxyethyl methacrylate (HEMA), and N,N-dimethylacrylamide (DMA). Then, polymeric dipolarophiles were synthesized via the esterification between the above terpolymers and N-maleoyl alanine. Similarly, the pH-sensitive terpolymers were also fabricated via conventional free-radical polymerization of 4-vinylpyridine, HEMA, and DMA, and then, polymeric dipoles were acquired via the decoration of the as-prepared terpolymers with 2-azidoacetic acid. Afterward, the smart hydrogels were fabricated via the aqueous 1,3-dipole cycloaddition reaction between the as-prepared polymeric dipolarophiles and dipoles without the use of catalysts. The results of swelling measurements confirm that the hydrogels possessed thermal and pH dual sensitivity. Moreover, the investigation of the behavior of oscillatory swelling shrinking indicates their sensitivity to temperature and pH was reversible and repeatable, which is of great significance for the repeated use of the prepared hydrogels. The proposed strategy demonstrates a great application prospects in the preparation of hydrogels as there were no catalysts and organic solvents employed. POLYM. ENG. SCI., 60:917-924, 2020.

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“…The resulting product was pelleted into cylindrical shapes with a diameter of 6 mm and a length of 5-8 mm, and can be used as a fertilizer. Mineral clays, such as kaolin (Al 2 Si 2 O 5 (OH) 4 ) or nanotubes of halloysite, can be used as a natural filler to obtain granulated NPK, type 25:75:0; 50:50:0, or 75:25:0 [5], or to obtain nitrogen fertilizers featuring controlled release and high water retention capacity [6,7]. In other studies, the silica obtained from rice husks, together with biodegradable polymers, charcoal, and organic fertilizers, can be used to obtain biodegradable mulch [8].…”

Section: Introductionmentioning

confidence: 99%

Study Regarding the Potential Use of a Spent Microbial Biomass in Fertilizer Manufacturing

Radu

Chirvase²,

Băbeanu

et al. 2020

Agronomy

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A spent biomass, which results from the biopharma industry, is stabilized and functionalized by biosorption with microelements. The efficiency of this new biomaterial was tested in two experiments: (1) In a mixture with soil to determine its effects of the germination capacity of cereals and vegetables, and (2) in a formulation of mixed fertilizers to determine its influence on the development and production of the two types of vegetables. The results obtained during germination experiments performed in pots showed that at a biomass concentration less than 20%, the germination output was greater than 95% and the germination index was almost 1. The experiments performed in land on vegetables (including Solanum lycopersicum and Capsicum annuum) featured six types of fertilizers formulated with new biomaterials. The obtained results indicated that two types of fertilizers (N 10:0:0 and NP 5:5:0), which were formulated with functionalized biomass and featured the microelements Co, Cu, Fe, Mn, and Zn, exhibited significant effects when compared with vegetables cultivated on unfertilized soil surfaces (the untreated variant). The studies regarding the effect of the new fertilizers obtained based on spent biomass from biopharma industry indicate the following: (a) This material, even if it is stabilized and functionalized, cannot be used as such as a germination substrate for vegetables; in addition, it cannot be introduced into soil together with cereals seeds (during the autumn work), because the germination can be affected negatively; (b) the functionalized biomass can be used in the formulation of different types of fertilizers; if these fertilizers are introduced into soil with the autumn plowing, then they may have a positive influence on the yield of some species of vegetable, such as Solanum lycopersicum and Capsicum annum. The new fertilizers have a major environmental impact due to: (1) Removal of waste, which results from pharmaceutical biosyntheses, with significant impact on soil pollution, due to its storage in the form of waste dumps, on the soil; (2) recovery and reinsertion into the natural circuit of nutrients like C, N,

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Preparation and characterization of slow-release and water-retention fertilizer based on starch and halloysite

Cited by 98 publications

References 61 publications

Biodegradable Polymer Coated Granular Urea Slows Down N Release Kinetics and Improves Spinach Productivity

Biodegradable Polymer Coated Granular Urea Slows Down N Release Kinetics and Improves Spinach Productivity

Preparation and Characterization of Thermal and pH Dual Sensitive Hydrogel Based on 1,3‐Dipole Cycloaddition Reaction

Study Regarding the Potential Use of a Spent Microbial Biomass in Fertilizer Manufacturing

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