scholarly journals Use of urease inhibitors to reduce ammonia volatilization in Amazonian soils

2019 ◽  
Vol 54 ◽  
Author(s):  
Iara Magalhães Barberena ◽  
Marcelo Curitiba Espindula ◽  
Larissa Fatarelli Bento de Araújo ◽  
Alaerto Luiz Marcolan
Keyword(s):  
Ammonia Volatilization ◽  
Peak Level ◽  
Urease Inhibitors ◽  
Urease Inhibitor ◽  
Southwestern Amazonia

Abstract: The objective of this work was to evaluate urease inhibitors for the reduction of ammonia volatilization in Amazonian soils. The work was carried out on a clayey yellow Oxisol, a clayey red Oxisol, and on a light silty Ultisol. Each experiment was conducted in split plots, using standard urea, urea + a benzimidazole-type urease inhibitor (BZI1), urea + a benzoylthiourea-type urease inhibitor (RTB68), urea + N-(n-butyl) triamide thiophosphate (NBPT), or a fertilizer-free control. Volatilized ammonia was collected at 48, 96, 144, 192, 240, 288, 336, and 384 hours after fertilization. Ammonia volatilization reached a maximum at 144 hours in the urea, urea + benzimidazole, and urea + benzoylthiourea treatments. A peak level was reached at 192 and 288 hours in the urea + N-(n-butyl) triamide thiophosphate treatment. In yellow Oxisols, benzimidazole and benzoylthiourea reduced the ammonia losses by 22 and 10%, respectively, in soils without urease inhibitors. However, neither of these agents significantly reduced ammonia volatilization at the rate determined for standard urea in red Oxisols or Ultisols. N-(n-butyl) triamide thiophosphate is the most efficient urease inhibitor for the soils of southwestern Amazonia.

scholarly journals Ammonia volatilization of urea in the out-of-season corn

2009 ◽  
Vol 33 (6) ◽  
pp. 1685-1694 ◽  
Author(s):  
Hamilton Seron Pereira ◽  
Anabelisa Ferreira Leão ◽  
Adriana Verginassi ◽  
Marco Aurélio Carbone Carneiro
Keyword(s):  
Urease Activity ◽  
Ammonia Volatilization ◽  
Urease Inhibitors ◽  
Urease Inhibitor ◽  
N Losses ◽  
Coated Urea ◽  
Polymer Coated Urea

The aim of this study was to evaluate the N losses due to volatilization at different rates of common urea, polymer coated urea and urease inhibitor-treated urea in the out-of-season corn, using semi-open static collectors. The treatments consisted of N levels on side-dressing fertilization with urea in different treatments: (a) control (without N), (b) urea 40 kg ha-1 N, (c) urea 80 kg ha-1 N, (d) polymer coated urea 40 kg ha-1 N, (e) polymer coated urea 80 kg ha-1 N and (f) urea with the urease inhibitor (UI) N 80 kg ha-1 N. The results showed that the treatments with polymer coated urea and with urease inhibitor-treated urea reduced the volatilization of N around 50 % compared to common urea, either in the first and the second N side-dressing fertilizations. Thus, they demonstrate that the polymer coat and the urease inhibitors were effective in reducing the volatilization of urea N applied in coverage, which resulted in higher productivity. There was also increasing urease activity in the treatments with application of common urea.

scholarly journals Urease Inhibitors Effects on the Nitrogen Use Efficiency in a Maize–Wheat Rotation with or without Water Deficit

Agriculture ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 684
Author(s):  
Raúl Allende-Montalbán ◽  
Diana Martín-Lammerding ◽  
María del Mar Delgado ◽  
Miguel A. Porcel ◽  
José L. Gabriel
Keyword(s):  
Ammonia Volatilization ◽  
Urease Inhibitors ◽  
Urease Inhibitor ◽  
Adaptation To Climate Change ◽  
N Loss ◽  
N Losses ◽  
Wheat Field ◽  
Promising Strategy ◽  
Use Efficiency ◽  
N Use

The use of urease inhibitors in irrigated systems decreases both soil ammonium (NH4+) and nitrate (NO3−) availability, and, thus, could be an easy tool to reduce N loss due to ammonia volatilization and NO3− leaching. The main goal of this experiment was to assess the effect of urease inhibitors on N use efficiency, N losses, and their economic impact in a maize-wheat field experiment. In this study, 10 treatments were compared, combining the urea fertilizer with or without urease inhibitor, applied in one or two dressings, and under optimal or sub-optimal irrigation. A single application of urease inhibitor (IN1d), coupled with the conventional urea, helped to reduce the nitrate leaching risk both during the maize period (even when compared to the two dressing treatment) and after harvest. In addition, this improvement was achieved together with an increase in economic benefit, even when compared with the application of the same amount of regular urea split into two dressings. Under low water availability systems, the benefits of applying urease inhibitors increased with respect to the application of regular urea, making this technique a very promising strategy for adaptation to climate change in arid and semiarid regions.

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 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.

Use of NBPT and ammonium thiosulphate as urease inhibitors with varying surface placement of urea and urea ammonium nitrate in production of hard red spring wheat under reduced tillage management

2014 ◽  
Vol 94 (2) ◽  
pp. 329-335 ◽  
Author(s):  
C. A. Grant
Keyword(s):  
Grain Yield ◽  
Ammonium Nitrate ◽  
Spring Wheat ◽  
Triticum Aestivum L ◽  
Fertilizer Efficiency ◽  
Reduced Tillage ◽  
Urease Inhibitors ◽  
Urease Inhibitor ◽  
Hard Red Spring Wheat ◽  
Urea Ammonium Nitrate

Grant, C. A. 2014. Use of NBPT and ammonium thiosulphate as urease inhibitors with varying surface placement of urea and urea ammonium nitrate in production of hard red spring wheat under reduced tillage management. Can. J. Plant Sci. 94: 329–335. Field studies were conducted at two locations over 3 yr to evaluate the effect of surface placement of urea ammonium nitrate (UAN) and urea fertilizers, with and without the urease inhibitor N-(n-butyl) thiophosphoric triamide (NBPT) on straw and grain yield of hard red spring wheat (Triticum aestivum L.) grown under reduced tillage management. Ammonium thiosulphate (ATS) was also evaluated as a urease inhibitor with UAN. Surface sprayed applications of UAN were frequently less effective than dribble-banded UAN applications or broadcast or dribble-banded urea in increasing grain or straw yield of hard red spring wheat. Use of NBPT with the sprayed UAN increased its effectiveness, so that grain and straw yields were similar to those with urea or with surface dribble-banded UAN. Addition of NBPT to broadcast or banded urea did not increase straw or grain yield under the conditions of this study. While there was some indication that use of ATS with UAN may have had a limited effect on fertilizer efficiency, it did not increase final grain yield as compared with dribble-banded or spray UAN applied alone or with NBPT. If surface nitrogen (N) applications are used in reduced tillage systems, spray applications of UAN should be avoided in favour of dribble-band applications, or the use of urea. Alternately, NBPT may be effective in improving the efficacy of spray UAN.

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