Evaluation of coated urea for ammonia volatilization loss, nitrogen mineralization and microsite pH in selected soil series

2011 ◽  
Vol 11 (2) ◽  
Author(s):  
Nasima Junejo
Keyword(s):  
Nitrogen Mineralization ◽  
Ammonia Volatilization ◽  
Soil Series ◽  
Coated Urea

scholarly journals CONSEQUENCES OF Cu and Zn COATED UREA TO MINIMIZE AMMONIA VOLATILIZATION

2016 ◽  
Vol 78 (6-12) ◽  
Author(s):  
Saima Kalsoom Babar ◽  
Mohd Khanif Yusop ◽  
Shakeel Ahmed Babar ◽  
Aijaz Ali Khooharo
Keyword(s):  
Ammonia Volatilization ◽  
N Uptake ◽  
Soil Series ◽  
Nh3 Volatilization ◽  
N Losses ◽  
Significant Difference ◽  
Coated Urea ◽  
Positive Effect ◽  
Range Test ◽  
Cu And Zn

Nitrogen (N) losses from agricultural fields are commonly observed particularly from urea. The rate of urea hydrolysis is accelerated as it remains in conventional form and about 70% of applied urea losses in different forms to atmosphere. Ammonia volatilization is persuasive loss among all the losses from urea. Therefore to minimize ammonia (NH3) volatilization the micronutrient coated urea is applied to enhance N-efficiency and its uptake. This study is an application of micronutrient coated urea with zinc (Zn) and copper (Cu) for two soil series of Malaysia. A laboratory experiment was designed according to the force draft technique for trapping the NH3 loss. The results have manifested that the rate of ammonia volatilization was 16% from uncoated urea and 8% from coated urea with micronutrients during the first two weeks of observations. After the six weeks of observations it was perceived that the ammonia losses for both soil series were gradually decreased with time. The mean comparison by using Tukey’s range test has shown the positive effect of micronutrient coated urea in comparison with the conventional urea. However the urea coated with the combination of both micronutrients Cu and Zn has shown significant difference in contrast to the coating urea with single micronutrient. The overall results revealed the efficacy of micronutrient coated urea on both of the soil series to maximize N-uptake and reduce NH3 volatilization.

Agronomic Evaluation of Coated Urea to Reduce Ammonia Volatilization from Side-dress Applications to Corn

2013 ◽  
Vol 12 (1) ◽  
pp. CM-2013-0117-01-RS
Author(s):  
William Hunter Frame ◽  
Marcus M. Alley ◽  
Wade Thomason ◽  
Garnett Whitehurst ◽  
Brooks Whitehurst ◽  
...  
Keyword(s):  
Ammonia Volatilization ◽  
Agronomic Evaluation ◽  
Coated Urea

Pertes d'azote par volatilisation ammoniacale après fertilisation en forêt de pin gris

1971 ◽  
Vol 1 (2) ◽  
pp. 69-79 ◽  
Author(s):  
D. Carrier ◽  
B. Bernier
Keyword(s):  
Ammonium Nitrate ◽  
Ammonia Volatilization ◽  
Urea Hydrolysis ◽  
Soil Horizons ◽  
The Third ◽  
Joint Application ◽  
Humus Layer ◽  
Coated Urea ◽  
Increasing Precipitation ◽  
Underlying Soil

In a field study, percentage of nitrogen lost as ammonia from a jack pine (Pinusbanksiana Lamb.) soil increased with increasing rates of urea application between 112 and 448 kg N/ha. After 7 days, losses amounted to 18–28% of a 224 kg urea-N/ha application, representing 60–87% of the total losses measured over a 6-week period. Maximum volatilization rates occurred between the third and the fifth day after fertilization, at which time urea hydrolysis was virtually complete. Negligible ammonia losses were measured in plots treated with ammonium sulfate, ammonium nitrate, and sulfur-coated urea. Applying superphosphate with urea markedly depressed ammonia volatilization, an effect which was enhanced by a joint application of K2SO4•MgSO4. Reduction of volatilization by artificial precipitation was significant and increased with increasing precipitation when the latter was applied soon after fertilization; decreases in volatilization were then related to the amount of residual urea subject to diffusion into the humus layer or to leaching towards the underlying soil horizons.

Nitrogen Mineralization and Ammonia Volatilization from Fractionated Poultry Litter

1994 ◽  
Vol 58 (2) ◽  
pp. 367-372 ◽  
Author(s):  
M. L. Cabrera ◽  
S. C. Tyson ◽  
T. R. Kelley ◽  
O. C. Pancorbo ◽  
W. C. Merka ◽  
...  
Keyword(s):  
Nitrogen Mineralization ◽  
Ammonia Volatilization ◽  
Poultry Litter

Effect of nitrogen fertilizers on ammonia volatilization in wild blueberry production

2006 ◽  
Vol 86 (Special Issue) ◽  
pp. 1383-1386 ◽  
Author(s):  
Gloria Thyssen ◽  
David Percival ◽  
David Burton ◽  
Kevin Sanderson
Keyword(s):  
Key Words ◽  
Ammonium Sulphate ◽  
Nutrient Availability ◽  
Prince Edward Island ◽  
Ammonia Volatilization ◽  
Nitrogen Fertilizers ◽  
Site Specific ◽  
Coated Urea ◽  
Wild Blueberry ◽  
Key Words Nitrogen

Environmental losses of soil-applied N-fertilizers through ammonia volatilization were examined. Volatilization trials were established in the vegetative phase of wild blueberry production in Nova Scotia (NS) and Prince Edward Island (PE) in 2004 and 2005. Treatments consisted of no fertilizer (control) and N applications (35 kg N ha-1) of ammonium sulphate (AS), diammonium phosphate (DAP), urea (U) and sulphur coated urea (SCU). When compared with the control, results indicated significantly elevated volatilization rates for U (303% NS in 2004, 274% PE in 2005), SCU (273% NS in 2004, 205% PE in 2005) and DAP (178% PE in 2005). Results indicate that volatilization losses are significant, site specific and may contribute to reductions in nutrient availability. Key words: Nitrogen, wild blueberry, environmental losses, ammonia, volatilization

scholarly journals Ammonia volatilization and yield components after application of polymer-coated urea to maize

2014 ◽  
Vol 38 (4) ◽  
pp. 1200-1206 ◽  
Author(s):  
Eduardo Zavaschi ◽  
Letícia de Abreu Faria ◽  
Godofredo Cesar Vitti ◽  
Carlos Antonio da Costa Nascimento ◽  
Thiago Augusto de Moura ◽  
...  
Keyword(s):  
Grain Yield ◽  
Ammonia Volatilization ◽  
Soil Surface ◽  
Nitrogen Fertilizers ◽  
Control Treatment ◽  
Favorable Effect ◽  
Nutritional Characteristics ◽  
Coated Urea ◽  
Polymer Coated Urea ◽  
Spad Readings

A form of increasing the efficiency of N fertilizer is by coating urea with polymers to reduce ammonia volatilization. The aim of this study was to evaluate the effect of polymer-coated urea on the control of ammonia volatilization, yield and nutritional characteristics of maize. The experiment was carried out during one maize growing cycle in 2009/10 on a Geric Ferralsol, inUberlândia, MG, Brazil. Nitrogen fertilizers were applied as topdressing on the soil surface in the following urea treatments: polymer-coated urea at rates of 45, 67.5 and 90 kg ha-1 N and one control treatment (no N), in randomized blocks with four replications. Nitrogen application had a favorable effect on N concentrations in leaves and grains, Soil Plant Analysis Development (SPAD) chlorophyll meter readings and on grain yield, where as coated urea had no effect on the volatilization rates, SPAD readings and N leaf and grain concentration, nor on grain yield in comparison to conventional fertilization.

scholarly journals Performance of Urea-Based Fertilizers Associated With Elemental Sulfur or Polymers on Ammonia Volatilization

2021 ◽  
Vol 13 (4) ◽  
pp. 73
Author(s):  
Odirley Rodrigues Campos ◽  
Edson Marcio Mattiello ◽  
Wedisson Oliveira Santos ◽  
Reinaldo Bertola Cantarutti ◽  
Rafael Coca Cuesta ◽  
...  
Keyword(s):  
Soil Ph ◽  
Ammonia Volatilization ◽  
Elemental Sulfur ◽  
Soil Surface ◽  
Acidithiobacillus Thiooxidans ◽  
Nh3 Volatilization ◽  
Oxidation Rates ◽  
Coated Urea ◽  
Polymer Coated Urea ◽  
Urea Granules

High N-NH3 losses are expected when conventional urea is applied to the soil surface. In order to reduce it, urea granules could be coated with different materials to decrease fertilizer dissolution rate or to stabilize N-NH4+ by acidification. In this study, we investigated the effect of a polymer-coated urea and powdered S0 added to urea, in the presence or absence of a S-oxidizing bacterium (Acidithiobacillus thiooxidans), on soil pH, SO42- availability, NH4+, and NH3 volatilization. Applying S0 before urea and the inoculation with bacteria have promoted the highest S0 oxidation rates. The greater decrease in soil pH occurred when S0 was applied before urea at a higher dose, which also decreased NH3 volatilization by 83% up to 4 days after urea application. However, the decrease in soil pH did not increase the concentration of NH4+, nor did it decrease the accumulated amount of volatilized NH3 over time. The inoculation of A. thiooxidans accelerates S0 oxidation process, but it was insufficient to counteract the H+ consumption by urea hydrolysis. Therefore, the S0 application with urea did not offer chemical protection against NH3 loss, but a physical barrier in the controlled-release urea had less dissolved urea in soil and reduced NH3 losses.

scholarly journals Hygroscopicity and ammonia volatilization losses from nitrogen sources in coated urea

2014 ◽  
Vol 38 (3) ◽  
pp. 942-948 ◽  
Author(s):  
Letícia de Abreu Faria ◽  
Carlos Antonio Costa do Nascimento ◽  
Barbara Paquier Ventura ◽  
Gabriela Perissinotto Florim ◽  
Pedro Henrique de Cerqueira Luz ◽  
...  
Keyword(s):  
Boric Acid ◽  
Copper Sulfate ◽  
Ammonia Volatilization ◽  
Water Solubility ◽  
Crop Residues ◽  
Soil Surface ◽  
Nitrogen Sources ◽  
Coating Materials ◽  
Coated Urea ◽  
Controlled Release Fertilizers

Hygroscopic fertilizers tend to absorb moisture from the air and may have undesirable characteristics such as moistness, clumping and lower fluidity, hampering the application. The increasing use of urea is due to its numerous advantages, although this nitrogen (N) source is highly susceptible to volatilization losses, particularly when applied to the soil surface of management systems with conservation of crop residues. The volatilization losses can be minimized by slow or controlled-release fertilizers, with controlled water solubility of the urea-coating materials; and by stabilized fertilizers, which prolong the period during which N remains in the amide or ammonia forms by urease inhibitors. This study evaluated the hygroscopicity of and ammonia volatilization from urea coated with boric acid and copper sulfate or with sulfur. The hygroscopicity of the sources was evaluated over time after exposure to five levels of relative humidity (RH) and volatilization evaluated after application to the soil surface covered with sugarcane trash. Ammonium nitrate has a low potential for volatilization losses, but is highly hygroscopic. Although coating with boric acid and copper sulfate or elemental sulfur reduced the critical humidity level of urea, the delay in the volatilization process is a potential positive factor.

Gypsum Effect on Nitrogen Mineralization and Ammonia Volatilization from Broiler Litter

2013 ◽  
Vol 77 (6) ◽  
pp. 2045-2049 ◽  
Author(s):  
Archana Mishra ◽  
Miguel L. Cabrera ◽  
David E. Kissel ◽  
John A. Rema
Keyword(s):  
Nitrogen Mineralization ◽  
Ammonia Volatilization ◽  
Broiler Litter
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