Agronomic evaluation of controlled release of micro urea encapsulated in rosin maleic anhydride adduct

Majeed, Zahid; Khurshid, Kiran; Ajab, Zainab; Guan, Qing; Ahmad, Basharat; Mumtaza, Irsa; Ahmed, Muhammad Naeem; Khan, Rafi Ullah; Andleeb, Saiqa

doi:10.1080/01904167.2020.1750637

Cited by 3 publications

(3 citation statements)

References 25 publications

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“…Regardless of the FA application rate, the nitrogen uptake in the CRU treatments was higher than that in the Urea treatments. Meanwhile, the NAE and NUE in the CRU treatments were higher than those in the Urea treatments 10 . The FA rate did not affect the nitrogen uptake or NAE, but it had significant effects on NUE; the FA180 treatment had a higher NUE than those of FA90 and FA270.…”

Section: Discussionmentioning

confidence: 74%

“…Controlled-release urea (CRU) is a new type of fertilizer that releases nutrients according to a set mode through polymer coatings and other methods so that the nutrient release keeps pace with crop demand 8 – 10 . Compared with typical nitrogen fertilizer, CRU meets the needs of crops for nitrogen, effectively promotes the growth and development of crops, and simplifies cultivation technology.…”

Section: Introductionmentioning

confidence: 99%

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Effects of controlled-release urea combined with fulvic acid on soil inorganic nitrogen, leaf senescence and yield of cotton

Geng

Yang

Xian-qi

et al. 2020

Sci Rep

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A split-plot field experiment was conducted in 2018–2019 to study the effects of nitrogen fertilizer types and fulvic acid (FA) rates on soil nitrogen and cotton growth. The nitrogen fertilizers included controlled-release urea (CRU) and urea, which were applied combined with three FA rates (90, 180 and 270 kg ha-1). The main plot was the nitrogen fertilizer type, and the subplot was the FA rate. The results showed that the lint yield of the FA180 treatment was 5.2–8.6% higher than the FA90 and FA270 treatments. Moreover, moderate FA application markedly improved the cotton leaf SPAD value (chlorophyll relative value), photosynthesis and chlorophyll fluorescence parameters compared with low and high FA rates. Replacing urea with CRU significantly increased the soil inorganic nitrogen and nitrogen use efficiency and also improved cotton fiber quality parameters. Meanwhile, the boll weight and seed yield of the CRU treatments were 1.5–8.4% and 3.3–19.1% higher, respectively, than the urea treatments. The interaction between nitrogen type and FA rate had a positive effect on cotton growth. Thus, the application of CRU combined with 180 kg ha-1 FA on cotton can not only improve the fiber quality and delay leaf senescence but also increase the yield and economic benefit.

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Section: Discussionmentioning

confidence: 74%

Section: Introductionmentioning

confidence: 99%

Effects of controlled-release urea combined with fulvic acid on soil inorganic nitrogen, leaf senescence and yield of cotton

Geng

Yang

Xian-qi

et al. 2020

Sci Rep

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“…The simplest method is to encapsulate them in a grafted polymer matrix, such as polylactic acid, 12 chitosan, 13 montmorillonite, 14 bentonite, 15 etc. Another approach is to coat fertilizers with biodegradable polymer coatings: maleic anhydride, 16 polyurethane, 17 polyvinyl acetate, 18 organic clay composite, 19 gypsum, and starch, 20 carboxymethyl cellulose, 21 plant-derived materials, 22 and so on. Compared to encapsulating fertilizers inside polymers, coating fertilizers is a complex process and cumbersome; although fertilizer encapsulation technology has great potential for application and a lot of research has been done on hydrogel encapsulation, most of the slow-release hydrogels lose the original high water absorption characteristics of hydrogels.…”

Section: ■ Introductionmentioning

confidence: 99%

Waste Cabbage-Integrated Nutritional Superabsorbent Polymers for Water Retention and Absorption Applications

et al. 2022

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To alleviate soil impoverishment and water shortage in desert areas, as well as to reduce the impact of waste cabbage on the environment and human health, we used waste cabbage as a substrate, 2-acrylamide-2-methyl-1-propane sulfonic acid (AMPS) and acrylic acid (AA) as polymerization units, and NH4Cl and KNO3 as nutriment to obtain two waste cabbage-superabsorbent polymers (CB-SAPNH4Cl and CB-SAPKNO3) by the one-pot method. The chemical structure, thermal stability, and morphology of the polymers were investigated by Fourier-transform infrared spectroscopy (FTIR), thermal gravimetric analysis (TGA), and scanning electron microscope (SEM). Meanwhile, the water retention, water absorption, and salt resistance were compared with the purchased polymers. The results showed that the nutriment was successfully encapsulated inside the polymer, and CB-SAPNH4Cl and CB-SAPKNO3 at 1% nutrient concentration showed excellent water retention properties, salt resistance, and water absorption performance of 1546 and 1131 g/g (distilled water), 306 and 277 g/g (tap water), and 116 and 91 g/g (0.9% NaCl solution). Therefore, they are highly promising materials for the application.

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A Comparative Study on the Properties of Rosin-Based Epoxy Resins with Different Flexible Chains

Deng,

Wang,

et al. 2023

Polymers

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This study aims to reveal the effects of flexible chain lengths on rosin-based epoxy resin’s properties. Two rosin-based epoxy monomers with varying chain lengths were synthesized: AR-EGDE (derived from ethylene glycol diglycidyl ether-modified acrylic acid rosin) and ARE (derived from acrylic acid rosin and epichlorohydrin). Diethylenetriamine (DETA), triethylenetetramine (TETA), and tetraethylenepentamine (TEPA) with different flexible chain lengths were used as curing agents. The adhesion, impact, pencil hardness, flexibility, water and heat resistance, and weatherability of the epoxy resins were systematically examined. It was found that when the flexible chains of rosin-based epoxy monomers were grown from ARE to AR-EGDE, due to the increased space of rosin-based fused rings, the toughness, adhesion, and water resistance of the rosin-based epoxy resins were enhanced, while the pencil hardness and heat resistance decreased. However, when the flexible chains of curing agents were lengthened, the resin’s performance did not change significantly because the space between the fused rings changed little. This indicates that the properties of the rosin-based resins can only be altered when the introduced flexible chain increases the space between the fused rings. The study also compared rosin-based resins to E20, a commercial petroleum-based epoxy of the bisphenol A type. The rosin-based resins demonstrated superior adhesion, water resistance, and weatherability compared to the E20 resins, indicating the remarkable durability of the rosin-based resin.

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Agronomic evaluation of controlled release of micro urea encapsulated in rosin maleic anhydride adduct

Cited by 3 publications

References 25 publications

Effects of controlled-release urea combined with fulvic acid on soil inorganic nitrogen, leaf senescence and yield of cotton

Effects of controlled-release urea combined with fulvic acid on soil inorganic nitrogen, leaf senescence and yield of cotton

Waste Cabbage-Integrated Nutritional Superabsorbent Polymers for Water Retention and Absorption Applications

A Comparative Study on the Properties of Rosin-Based Epoxy Resins with Different Flexible Chains

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