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Jahns, T.M.; Schepp, Roswitha; Siersdorfer, C.; Kaltwasser, Heinrich

doi:10.1023/a:1021856200578

Cited by 14 publications

(3 citation statements)

References 12 publications

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“…It could be seen that more than 30% of the N content was released within 1 day, and about 58% of the N content was “locked” in UF on the 56th day. Thus, for now, UF is only applied to perennial plants, such as forests, lawns, and so on, just because of the long release cycle of nutrient N. − The N-release rate for SRNP was fast in the first 10 days and then gradually slowed down. Additionally, the cumulative N release of SRNP reached only 52.8% after 56 days.…”

Section: Resultsmentioning

confidence: 97%

Granular, Slow-Release Fertilizer from Urea-formaldehyde, Ammonium Polyphosphate, and Amorphous Silica Gel: A New Strategy Using Cold Extrusion

Xiang

Shi

et al. 2018

J. Agric. Food Chem.

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A new granular, slow-release fertilizer prepared by a cold-extrusion strategy (GSRFEx) based on urea-formaldehyde (UF), ammonium polyphosphate (APP), and amorphous silica gel (ASG) was presented. Characterizations showed that there were strong hydrogen-bond interactions and good compatibility among UF, APP, and ASG in GSRFEx. The mechanical properties as well as the slow-release properties of GSRFEx were greatly enhanced after the addition of APP and ASG to UF. Rape pot experiments indicated that GSRFEx could improve N-use efficiency dramatically and thereby facilitate the growth of rape. Importantly, as an economical, effective, and environment-friendly technology, cold extrusion has great potential to be applied in horticulture and agriculture. We hope that our work can offer an alternative method for the design of slow-release fertilizers with desirable properties.

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Section: Resultsmentioning

confidence: 97%

Granular, Slow-Release Fertilizer from Urea-formaldehyde, Ammonium Polyphosphate, and Amorphous Silica Gel: A New Strategy Using Cold Extrusion

Xiang

Shi

et al. 2018

J. Agric. Food Chem.

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“…with reference to non-toxicity, the low concentration required to act in an effective way, favourable stability versus time characteristics and a high degree of compatibility with ureabased fertilizers (solid and liquid) (Fu et al, 2018). Another very important factor for urease and nitrification inhibitors is their degradability in the soil without any significant accumulation effect in the soil and/or in the roots of the plant (Jahns et al, 1999;Boyandin et al, 2016). Regulation (EC) No 2003/2003 directly defines the authorized substances that are permitted to act as urease and nitrification inhibitors, while Regulation (EC) No 2019/1009 no longer defines inhibitors in detail.…”

Section: Legal and Economic Aspectsmentioning

confidence: 99%

New slow-release fertilizers – economic, legal and practical aspects: a Review

Wesołowska¹,

Rymarczyk²,

Góra³

et al. 2021

Int. Agrophys.

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The improper adjustment of the release characteristics of commonly used mineral fertilizers to the nutritional requirements of plants results in the loss of a significant part of them by infiltration into the soil profile or in the form of greenhouse gas emissions into the atmosphere. Legal regulations including the national emission ceilings directive, require the Member States of European Union to limit ammonia emissions from agriculture. In order to minimize the losses of valuable nutrients and to reduce greenhouse gas emissions it is necessary to find new solutions and technologies in agriculture. Specialists emphasize the beneficial effects of localized fertilization methods and the use of the slow-release/controlled-release fertilizers. Field studies conducted on newly obtained fertilizers prove their beneficial effect on the quality and quantity of the crop but currently the products offered on the market are too expensive to use in large acreage crops. This article presents an overview of some particular economic, legal and practical aspects of slow-release fertilizer production and use. Additionally, the results of field tests indicating their beneficial effect on plant yield, the plant response to stressful conditions and methods for environmental protection are also presented. K e y w o r d s: slow-release and controlled-release fertilizers, national emission ceilings directive, greenhouse gas emissions, NH 3 emisions Ta b l e 1. Nitrogen losses by ammonia emissions from typical fertilizers: ammonium nitrate (AN), urea-ammonium nitrate solution (UAN) and urea for two chosen agricultural ecosystems (based on Fertilizers Europe, 2019) Fertilizer type Volatilization losses (% N) Arable land Grassland (%)

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“…Nickel‐containing enzymes assist the catalysis of many important biological processes. Most of them are significant in the context of industry and environment, such as (1) hydrolysis of urea to ammonia (urease), (2) interconversion of carbon monoxide and carbon dioxide (carbon monoxide dehydrogenase), (3) acetyl group metabolism into separate one‐carbon units or acetate synthesis using one‐carbon precursors (acetyl‐coenzyme A synthase), (4) isomerization of hemithioacetal in order to detoxify the cytotoxic methylglyoxal (glyoxalase I), (5) reversible interconversion of dihydrogen into protons and electrons (NiFe hydrogenase), (6) degradation of methylenediurea, a slow release fertilizer (methylenediurease), (7) methane generation (methyl‐coenzyme M reductase), (8) dismutation of toxic and cell damaging superoxide radical anions into harmless molecular oxygen (nickel superoxide dismutase), and on top of all, (9) oxidation of 1,2‐dihydroxy‐3‐keto‐5‐methylthiopentene (acireductone) into methylthio propionic acid, formic acid and carbon monoxide (acireductone dioxygenase, ARD; Scheme ) …”

Section: Introductionmentioning

confidence: 99%