Effect of hydroquinone and copper coated urea on ammonia volatilization loss and n mineralization from tropical soil: Laboratory study

Nitrogen fertilizer has a significant participation in the cost of agricultural production. It is less efficient agronomically and requires more studies to find strategies to be absorbed by crop. Polymer-coated urea is an alternative for the production of increased efficiency fertilizers. Validation of this technology should be performed for safe adoption in agriculture. The objectives of this work were to evaluate the nitrogen losses by volatilization of ammonia and the nitrogen contents in the nitric (N-NO3-) and ammoniacal (N-NH4+) forms in the tropical soil after application of urea sources. Three greenhouse experiments with different soil moisture conditions were carried out after application of urea, urea treated with NBPT and urea coated with Policote polymer as treatments. Then volatilization of ammonia, N-NO3- and N-NH4+ contents in the soil was evaluated. The volatilization of ammonia was observed after using Policote-coated urea, which was similar to urea treated with NBPT. However, both of which were lower than that observed under urea application. In dry or very humid soil, the ammonia volatilization rate was low. The reduction of the volatilization of ammonia in the soil with Policote-coated urea was related on the humidity, whereas more effective when the conditions were more propitious to the volatilization of ammonia. The Policote-coated urea increased the content of N-NH4+ in the tropical soil compared to urea. The content of N-NH4+ in the soil was higher than N-NO3- after application of fertilizers due to the low organic matter content.

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

Crop Management ◽

10.1094/cm-2013-0117-01-rs ◽

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

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CONSEQUENCES OF Cu and Zn COATED UREA TO MINIMIZE AMMONIA VOLATILIZATION

Jurnal Teknologi ◽

10.11113/jt.v78.9209 ◽

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.

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

Canadian Journal of Forest Research ◽

10.1139/x71-009 ◽

1971 ◽

Vol 1 (2) ◽

pp. 69-79 ◽

Cited By ~ 12

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.

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N-(n-Butyl) Thiophosphoric Triamide (NBPT)-Coated Urea (NCU) Improved Maize Growth and Nitrogen Use Efficiency (NUE) in Highly Weathered Tropical Soil

Sustainability ◽

10.3390/su12218780 ◽

2020 ◽

Vol 12 (21) ◽

pp. 8780

Author(s):

Muhammad Muhaymin Mohd Zuki ◽

Noraini Md. Jaafar ◽

Siti Zaharah Sakimin ◽

Mohd Khanif Yusop

Keyword(s):

Nitrogen Use Efficiency ◽

Plant Uptake ◽

N Uptake ◽

Growth Yield ◽

Dry Weight ◽

Tropical Soil ◽

Nitrogen Use ◽

Weight Yield ◽

Coated Urea ◽

Use Efficiency

Nitrogen (N) fertilizer is commonly used to supply sufficient N for plant uptake, for which urea is one of the highly preferred synthetic N fertilizers due to its high N content. Unfortunately, N provided by urea is rapidly lost upon urea application to soils through ammonia volatilization, leaching, and denitrification. Thus, treatment of urea with urease inhibitor (N-(n-Butyl) Thiophosphoric Triamide (NBPT)) is among the solutions to slow down urea hydrolysis, therefore reducing loss of NH3 and saving N available for plant uptake and growth. A field study was carried out to evaluate the effects of NBPT-coated urea (NCU) at varying rates on growth, yield, and nitrogen use efficiency (NUE) of maize in tropical soil. The experiment was conducted at Field 15, Universiti Putra Malaysia, Serdang, Selangor, Malaysia, and maize (Zea mays var. Thai Super Sweet) was used as the test crop. The results showed that all maize grown in soils applied with urea coated with NBPT (NCU) (T2, T3, T4, and T5) had significantly (P ≤ 0.05) higher chlorophyll content compared to the control (T0 and T1). The surface leaf area of maize grown in NCU-treated soils at 120 kg N h−1 (T3) was recorded as the highest. NCU at and 96 kg N ha−1 (T3 and T4) were relatively effective in increasing maize plant dry weight, yield, and N uptake. Improvement of NUE by 45% over urea was recorded in the treatment of NCU at 96 kg N ha−1. NBPT-coated urea (NCU) at 96 kg N ha−1 had potential to increase the growth, yield, nitrogen uptake, and NUE of maize by increasing the availability of N for plant growth and development.

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Effect of nitrogen fertilizers on ammonia volatilization in wild blueberry production

Canadian Journal of Plant Science ◽

10.4141/p06-121 ◽

2006 ◽

Vol 86 (Special Issue) ◽

pp. 1383-1386 ◽

Cited By ~ 1

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

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Cation effects on ammonia volatilization loss from urea applied to a tropical soil

Progress in Nitrogen Cycling Studies ◽

10.1007/978-94-011-5450-5_78 ◽

1996 ◽

pp. 479-482

Author(s):

Y. M. Khanif ◽

H. Pancras ◽

C. Daud

Keyword(s):

Ammonia Volatilization ◽

Tropical Soil ◽

Cation Effects

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

Revista Brasileira de Ciência do Solo ◽

10.1590/s0100-06832014000400016 ◽

2014 ◽

Vol 38 (4) ◽

pp. 1200-1206 ◽

Cited By ~ 7

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.

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