Turnover of15N ammonium sulfate with dicyandiamide under aerobic and anaerobic soil conditions

Vilsmeier, K.

doi:10.1007/bf01048959

Cited by 16 publications

(2 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In contrast, under laboratory conditions, the relatively higher, stable soil-moisture levels were conducive for denitrification from anaerobic microsites to produce N 2 O, particularly from the treatments receiving no inhibitors. These findings are similar to other research (Vilsmeier, 1991;Khalil and Baggs, 2005;Khalil et al, 2006b), which gave importance to the persistence of anaerobic microsites in soils under aerobic conditions to initiate denitrification to form and release N 2 O simultaneously with nitrification. cropped conditions.…”

Section: Nitrous Oxide Emissions 411 Impact Of Croppingsupporting

confidence: 91%

Effects of urease and nitrification inhibitors added to urea on nitrous oxide emissions from a loess soil

Khalil

Gutser

Schmidhalter

2009

Z. Pflanzenernähr. Bodenk.

View full text Add to dashboard Cite

Urea fertilizer-induced N 2 O emissions from soils might be reduced by the addition of urease and nitrification inhibitors. Here, we investigated the effect of urea granule (2-3 mm) added with a new urease inhibitor, a nitrification inhibitor, and with a combined urease inhibitor and nitrification inhibitor on N 2 O emissions. For comparison, the urea granules supplied with or without inhibitors were also used to prepare corresponding supergranules. The pot experiments without vegetation were conducted with a loess soil at (20 ± 2)°C and 67% water-filled pore space. Urea was added at a dose of 86 kg N ha -1 by surface application, by soil mixing of prills (<1 mm) and granules, and by point-placement of supergranules (10 mm) at 5 cm soil depth. A second experiment was conducted with spring wheat grown for 70 d in a greenhouse. The second experiment included the application of urea prills and granules mixed with soil, the point-placement of supergranules and the addition of the urease inhibitor, and the combined urease plus nitrification inhibitors at 88 kg N ha -1 . In both experiments, maximum emissions of N 2 O appeared within 2 weeks after fertilization. In the pot experiments, N 2 O emissions after surface application of urea were less (0.45% to 0.48% of total fertilization) than from the application followed by mixing of the soil (0.54% to 1.14%). The N 2 O emissions from the point-placed-supergranule treatment amounted to 0.64% of total fertilization. In the pot experiment, the addition of the combined urease plus nitrification inhibitors, nitrification inhibitor, and urease inhibitor reduced N 2 O emissions by 79% to 87%, 81% to 83%, and 15% to 46%, respectively, at any size of urea application. Also, the N 2 O emissions from the surface application of the urease-inhibitor treatment exceeded those of the granules mixed with soil and the point-placed-supergranule treatments receiving no inhibitors by 32% to 40%. In the wheat growth experiment, the N 2 O losses were generally smaller, ranging from 0.16% to 0.27% of the total fertilization, than in the pot experiment, and the application of the urease inhibitor and the combined urease plus nitrification inhibitors decreased N 2 O emissions by 23% to 59%. The point-placed urea supergranule without inhibitors delayed N 2 O emissions up to 7 weeks but resulted in slightly higher emissions than application of the urease inhibitor and the urease plus nitrification inhibitors under cropped conditions. Our results imply that the application of urea fertilizer added with the combined urease and nitrification inhibitors can substantially reduce N 2 O emissions.

show abstract

Section: Nitrous Oxide Emissions 411 Impact Of Croppingsupporting

confidence: 91%

Effects of urease and nitrification inhibitors added to urea on nitrous oxide emissions from a loess soil

Khalil

Gutser

Schmidhalter

2009

Z. Pflanzenernähr. Bodenk.

View full text Add to dashboard Cite

show abstract

“…It has low water solubility (3.2 g/100 g water at 20°C) and contains at least 65% nitrogen. When applied to the soil it is decomposed (partly abiotically and partly biotically by specific enzymes) and converted via guanylurea and guanidine to urea, a conventional fertilizer [226][227][228][229].…”

Section: Dicyandiamidementioning

confidence: 99%

Fertilizers, 2. Types

Kiiski

Dittmar²,

Drach

et al. 2016

Ullmann's Encyclopedia of Industrial Chemistry

View full text Add to dashboard Cite

Plant Nutrition

Scherer

Mengel

Dittmar³

et al. 2002

Encyclopedia of Agrochemicals

View full text Add to dashboard Cite

Fertilizers in the broadest sense are products that improve the levels of available plant nutrients and/or the chemical and physical properties of soil, thereby directly or indirectly enhancing plant growth, yield, and quality. Fertilizers are classified in terms of their chemical compounds. Straight fertilizers generally contain only one primary nutrient. Compound fertilizers contain several primary nutrients and sometimes micronutrients as well. Micronutrient fertilizers contain nutrients required in small quantities by plants, as opposed to macronutrients. They are also classified as solid or liquid fertilizers and as soil or foliar fertilizers, the latter being applied exclusively by spraying on an existing plant population.

show abstract

Turnover of15N ammonium sulfate with dicyandiamide under aerobic and anaerobic soil conditions

Cited by 16 publications

References 11 publications

Effects of urease and nitrification inhibitors added to urea on nitrous oxide emissions from a loess soil

Effects of urease and nitrification inhibitors added to urea on nitrous oxide emissions from a loess soil

Fertilizers, 2. Types

Plant Nutrition

Contact Info

Product

Resources

About