scholarly journals Urease Inhibitor and Irrigation Management to Mitigate Ammonia Volatilization from Urea in No-Till Corn

2017 ◽  
Vol 41 (0) ◽  
Author(s):  
Fernando Viero ◽  
Guilherme Batista Menegati ◽  
Eduardo Carniel ◽  
Paulo Regis Ferreira da Silva ◽  
Cimélio Bayer
Keyword(s):  
Ammonia Volatilization ◽  
Irrigation Management ◽  
Urease Inhibitor ◽  
No Till

scholarly journals Ammonia volatilization from nitrogen fertilizers in no-till wheat and maize in southern Brazil

2014 ◽  
Vol 38 (5) ◽  
pp. 1515-1525 ◽  
Author(s):  
Fernando Viero ◽  
Cimélio Bayer ◽  
Sandra Mara Vieira Fontoura ◽  
Renato Paulo de Moraes
Keyword(s):  
Ammonium Sulfate ◽  
Ammonia Volatilization ◽  
Block Design ◽  
Nitrogen Fertilizers ◽  
Urease Inhibitor ◽  
Southern Brazil ◽  
N Losses ◽  
N Sources ◽  
South Central ◽  
No Till

Crop residues on the soil surface of no-till systems can intensify ammonia volatilization from N fertilizers applied to cereal crops. This study assessed the magnitude of N losses through ammonia volatilization from urea applied to no-till winter (wheat) and summer crops (maize) on a Typic Hapludox in the south-central region of Paraná, southern Brazil. In addition, the potential of alternative N sources (urea with urease inhibitor, liquid fertilizer, ammonium nitrate and ammonium sulfate) and different urea managements (fertilizer applied in the morning or afternoon) were evaluated. Two experiments with maize and wheat were carried out for two years, arranged in a randomized block design with four replications. Nitrogen volatilization losses were assessed with a semi-open static collector until 21 days after fertilization. In winter, the losses were low (<5.5 % of applied N) for all N sources, which were not distinguishable, due to the low temperatures. In the summer, volatilization rates from urea were higher than in the winter, but did not exceed 15 % of applied N. The main factor decreasing N losses in the summer was the occurrence of rainfall in the first five days after fertilization. Urea with urease inhibitor, nitrate and ammonium sulfate were efficient to decrease ammonia volatilization in maize, whereas the application time (morning or afternoon) had no influence.

scholarly journals MANAGEMENT OF IRRIGATION AND NITROGEN FERTILIZERS TO REDUCE AMMONIA VOLATILIZATION

2015 ◽  
Vol 39 (6) ◽  
pp. 1737-1743 ◽  
Author(s):  
Fernando Viero ◽  
Cimélio Bayer ◽  
Renan Costa Beber Vieira ◽  
Eduardo Carniel
Keyword(s):  
Ammonia Volatilization ◽  
Slow Release ◽  
Block Design ◽  
Irrigation Management ◽  
N Fertilization ◽  
Nitrogen Fertilizers ◽  
Urease Inhibitor ◽  
Nh3 Volatilization ◽  
Slow Release Fertilizer ◽  
N Sources

ABSTRACT Nitrogen losses by ammonia (NH3) volatilization can be reduced by appropriate irrigation management or by alternative N sources, replacing urea. The objective of this study was to evaluate the efficiency of irrigation management and N source combinations in decreasing NH3 volatilization from an Argissolo Vermelho Distrófico típico cultivated for 28 years with black oat (Avena strigosa) and maize (Zea mays), under no-tillage in the region of Depressão Central, Rio Grande do Sul, Brazil. The experiment was arranged in a randomized block design with split plots with three replications, where the main plots consisted of irrigation systems: no irrigation; irrigation immediately before and irrigation immediately after fertilization. The subplots were treated with different N sources: urea, urea with urease inhibitor and slow-release fertilizer, at an N rate of 180 kg ha-1, broadcast over maize, plus a control treatment without N fertilization. Ammonia volatilization was assessed using semi-open static collectors for 1, 2, 4, 6, and 10 days after N fertilization. In general, more than 90 % of total NH3-N losses occurred until three days after N fertilization, with peaks up to 15.4 kg ha-1 d-1. The irrigation was efficient to reduce NH3 losses only when applied after N fertilization. However, reductions varied according to the N fertilizer, and were higher for urea (67 %) and slightly lower for urea with urease inhibitor (50 %) and slow-release fertilizer (40 %), compared with the mean of the treatments without irrigation and irrigation before fertilization. The use of urea with urease inhibitor instead of urea was only promising under volatilization-favorable conditions (no irrigation or irrigation before N fertilization). Compared to urea, slow-release fertilizer did not reduce ammonia volatilization in any of the rainfed or irrigated treatments.

Soil properties and the ability of the urease inhibitor N-(n-BUTYL) thiophosphoric triamide (nBTPT) to reduce ammonia volatilization from surface-applied urea

1994 ◽  
Vol 26 (9) ◽  
pp. 1165-1171 ◽  
Author(s):  
C WATSON ◽  
H MILLER ◽  
P POLAND ◽  
D KILPATRICK ◽  
M ALLEN ◽  
...  
Keyword(s):  
Soil Properties ◽  
Ammonia Volatilization ◽  
Urease Inhibitor

scholarly journals Ammonia volatilization in no-till system in the south-central region of the State of Paraná, Brazil

2010 ◽  
Vol 34 (5) ◽  
pp. 1677-1684 ◽  
Author(s):  
Sandra Mara Vieira Fontoura ◽  
Cimélio Bayer
Keyword(s):  
Controlled Release ◽  
Central Region ◽  
Ammonia Volatilization ◽  
Nh3 Volatilization ◽  
The South ◽  
N Application ◽  
N Sources ◽  
South Central ◽  
N Source ◽  
No Till

Ammonia (NH3) volatilization can reduce the efficiency of urea applied to the surface of no-till (NT) soils. Thus, the objectives of this study were to evaluate the magnitude of NH3 losses from surface-applied urea and to determine if this loss justifies the urea incorporation in soil or its substitution for other N sources under the subtropical climatic conditions of South-Central region of Paraná State, Brazil. The experiment, performed over four harvesting seasons in a clayey Hapludox followed a randomized block design with four replicates. A single dose of N (150 kg ha-1) to V5 growth stage of corn cultivated under NT system was applied and seven treatments were evaluated, including surface-applied urea, ammonium sulfate, ammonium nitrate, urea with urease inhibitor, controlled-release N source, a liquid N source, incorporated urea, and a control treatment with no N application. Ammonia volatilization was evaluated for 20 days after N application using a semi-open static system. The average cumulative NH3 loss due to the superficial application of urea was low (12.5 % of the applied N) compared to the losses observed in warmer regions of Southeastern Brazil (greater than 50 %). The greatest NH3 losses were observed in dry years (up to 25.4 % of the applied N), and losses decreased exponentially as the amount of rainfall after N application increased. Incorporated urea and alternative N sources, with the exception of controlled-release N source, decreased NH3 volatilization in comparison with surface-applied urea. Urea incorporation is advantageous for the reduction of NH3 volatilization; however, other aspects as its low operating efficiency should be considered before this practice is adopted. In the South-Central region of Paraná, the low NH3 losses from the surface-applied urea in NT system due to wet springs and mild temperatures do not justify its replacement for other N sources.

Injection of Dicyandiamide-Treated Pig Slurry Reduced Ammonia Volatilization without Enhancing Soil Nitrous Oxide Emissions from No-Till Corn in Southern Brazil

2014 ◽  
Vol 43 (3) ◽  
pp. 789-800 ◽  
Author(s):  
Celso Aita ◽  
Rogério Gonzatto ◽  
Ezequiel C. C. Miola ◽  
Daniela B. dos Santos ◽  
Philippe Rochette ◽  
...  
Keyword(s):  
Nitrous Oxide ◽  
Ammonia Volatilization ◽  
Nitrous Oxide Emissions ◽  
Pig Slurry ◽  
Southern Brazil ◽  
No Till

Effects of the urease inhibitor N-(n-butyl)phosphorothioic triamide in low concentrations on ammonia volatilization and evolution of mineral nitrogen

1996 ◽  
Vol 22 (3) ◽  
pp. 196-201 ◽  
Author(s):  
L. Vittori Antisari ◽  
C. Marzadori ◽  
P. Gioacchini ◽  
S. Ricci ◽  
C. Gessa
Keyword(s):  
Ammonia Volatilization ◽  
Mineral Nitrogen ◽  
Urease Inhibitor ◽  
Low Concentrations

Effect of a new urease inhibitor on ammonia volatilization and nitrogen utilization in wheat in north and northwest China

2015 ◽  
Vol 175 ◽  
pp. 96-105 ◽  
Author(s):  
Qianqian Li ◽  
Ailing Yang ◽  
Zhaohui Wang ◽  
Marco Roelcke ◽  
Xinping Chen ◽  
...  
Keyword(s):  
Ammonia Volatilization ◽  
Northwest China ◽  
Nitrogen Utilization ◽  
Urease Inhibitor

Effects of the urease inhibitor N-(n-butyl)phosphorothioic triamide in low concentrations on ammonia volatilization and evolution of mineral nitrogen

1996 ◽  
Vol 22 (3) ◽  
pp. 196-201
Author(s):  
L. Vittori Antisari ◽  
C. Marzadori ◽  
P. Gioacchini ◽  
S. Ricci ◽  
C. Gessa
Keyword(s):  
Ammonia Volatilization ◽  
Mineral Nitrogen ◽  
Urease Inhibitor ◽  
Low Concentrations

Effects of form of effluent, season and urease inhibitor on ammonia volatilization from dairy farm effluent applied to pasture

2014 ◽  
Vol 14 (8) ◽  
pp. 1341-1349 ◽  
Author(s):  
Jie Li ◽  
Yuanliang Shi ◽  
Jiafa Luo ◽  
David Houlbrooke ◽  
Stewart Ledgard ◽  
...  
Keyword(s):  
Ammonia Volatilization ◽  
Dairy Farm ◽  
Urease Inhibitor

scholarly journals Evaluation of ammonia volatilization losses by adjusted parameters of a logistic function

2014 ◽  
Vol 38 (1) ◽  
pp. 223-231 ◽  
Author(s):  
Marcos Lima Campos do Vale ◽  
Rogério Oliveira de Sousa ◽  
Walkyria Bueno Scivittaro
Keyword(s):  
Multivariate Analysis ◽  
Ammonia Volatilization ◽  
Univariate Analysis ◽  
Logistic Function ◽  
Urease Inhibitor ◽  
N Losses ◽  
Total N ◽  
Soil Class ◽  
Soil Adsorption ◽  
Total Ammonia

The dynamics of N losses in fertilizer by ammonia volatilization is affected by several factors, making investigation of these dynamics more complex. Moreover, some features of the behavior of the variable can lead to deviation from normal distribution, making the main commonly adopted statistical strategies inadequate for data analysis. Thus, the purpose of this study was to evaluate the patterns of cumulative N losses from urea through ammonia volatilization in order to find a more adequate and detailed way of assessing the behavior of the variable. For that reason, changes in patterns of ammonia volatilization losses as a result of applying different combinations of two soil classes [Planossolo and Chernossolo (Typic Albaqualf and Vertic Argiaquolls)] and different rates of urea (50, 100 and 150 kg ha-1 N), in the presence or absence of a urease inhibitor, were evaluated, adopting a 2 × 3 × 2 factorial design with four replications. Univariate and multivariate analysis of variance were performed using the adjusted parameter values of a logistic function as a response variable. The results obtained from multivariate analysis indicated a prominent effect of the soil class factor on the set of parameters, indicating greater relevance of soil adsorption potential on ammonia volatilization losses. Univariate analysis showed that the parameters related to total N losses and rate of volatilization were more affected by soil class and the rate of urea applied. The urease inhibitor affected only the rate and inflection point parameters, decreasing the rate of losses and delaying the beginning of the process, but had no effect on total ammonia losses. Patterns of ammonia volatilization losses provide details on behavior of the variable, details which can be used to develop and adopt more accurate techniques for more efficient use of urea.

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