Effect of blending urea with pyrite or coating urea with polymer on ammonia volatilization loss from surface-applied prilled urea

Blaise, D.; Prasad, Rajendra

doi:10.1007/bf00307846

Cited by 23 publications

(13 citation statements)

References 12 publications

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“…Coated urea: Losses of urea through dissolution-cum volatilization can be minimized with the help some coating substances, however, the rainfall period must be considered as it significantly affects volatilization. The polymer coated material can reduce volatilization of urea ranging from 9 to 40% to that of uncoated urea when applied at 96 to 400 kg N ha -1 (Torello et al, 1983;Blaise and Prasad, 1995;Knight et al, 2007;Rochette et al, 2009). It is evident from these results that the coating of urea is an effective practice to reduce ammonia volatilization.…”

Section: Application Of Urea Prior To Irrigation or Rainfallmentioning

confidence: 95%

Nitrogen Management in Calcareous Soils: Problems and Solutions

Maqsood¹,

Awan²,

Aziz³

et al. 2016

PAKJAS

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Nitrogen (N) is the most widely applied plant nutrient and is a key constituent of animal manures. Improvement in crop yields and high economic returns have been made possible through supplementation of crops with organic and inorganic fertilizers. The movement of N in the environment has been extensively studied and documented. The fate of N ranges from nitrification, denitrification, nitrous oxide formation, leaching of nitrate, and volatilization of ammonia. Even with this knowledge the variation in N movement within the soil, air and water varies greatly with changed edaphic factors. For instance the fate of N fertilizer under calcareous soil systems still has not been investigated widely. We reviewed the sporadic information available on N fate and management in calcareous soils especially in Pakistan. We discussed the sources and fate of N in calcareous soils of Pakistan and also the currently adopted and newly developed method to reduce the N losses.

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Section: Application Of Urea Prior To Irrigation or Rainfallmentioning

confidence: 95%

Nitrogen Management in Calcareous Soils: Problems and Solutions

Maqsood¹,

Awan²,

Aziz³

et al. 2016

PAKJAS

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“…However, this depends on soil conditions (Stumpe et al ., ). Coating urea with polymers can slow down the rate of dissolution of the urea and thus reduce the ammonia loss (Blaise & Prasad, ; Knight et al ., ).…”

Section: Ammonia Volatilisationmentioning

confidence: 99%

Nitrogen losses from the soil/plant system: a review

Cameron

Moir

2013

Annals of Applied Biology

1,022

566

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Losses of nitrogen from the soil/plant system not only reduce soil fertility and plant yield but can also create adverse impacts on the environment. Ammonia emissions into the atmosphere contribute to acid rain and represent an indirect source of nitrous oxide greenhouse gas emissions. Nitrate leaching losses into rivers and lakes can cause eutrophication resulting in excessive growth of aquatic weeds and algae, which can reduce fish populations and the recreational value of the water. Nitrate contamination of drinking water supplies can cause health risks. Legislation that is designed to limit nitrate leaching losses from land has become a constraint on agricultural land use in many countries. Nitrous oxide emissions into the atmosphere contribute to the depletion of the ozone layer and also make a significant contribution to climate change. This review describes the nitrogen cycle in temperate soil/plant systems, the processes involved in each of the individual nitrogen loss pathways, the factors affecting the amounts of losses and the methods that are available to reduce these losses. The review has shown that careful management of temperate soil/plant systems using best management practices and newly developed technologies can increase the sustainability of agriculture and reduce its impact on the environment.

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“…The reduction of NH 3 -N volatilization obtained, in this study, as a result of TES application with urea-N fertilizer might be due to neutralization of the alkaline urea microsites by the H 2 SO 4 generated by TES upon oxidation (Blaise and Prasad 1995). Under aerobic conditions and in the presence of moisture, sulfur undergoes oxidation, producing H 2 SO 4 and then the acidic environment in the soil (low pH) favors the conversion of NH 3 to NH 4 + and thus suppresses NH 3 volatilization (Fenn and Hossner 1985).…”

Section: Nitrogen Uptake By Cornmentioning

confidence: 60%

Using Thiopaq Sulfur for Reducing Nh3 Volatilization From Calcareous Soils and Increasing N Use

Mahmoud

Rateb

2011

Journal of Soil Sciences and Agricultural Engineering

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A laboratory and greenhouse studies were conducted to evaluate the effect of different rates (0.1, 0.5 and 1.0 ton ha-1) of THIOPAQ elemental sulfur (TES) application to the urea amended calcareous soils on NH3-N volatilization from soil surface and on N uptake efficiency by corn plants. In incubation experiment under laboratory conditions, daily ammonia loss was measured for up to 30 days after surface urea-N applied to soil (200 kg N ha-1) using closed dynamic airflow system. Results showed that daily NH3-N loss in tested soils were in the order: M. Ismail > Adam > Abu Bakr soils within the first 18 days of incubation then turned to Abu Bakr > Adam > M. Ismail soils until the end of experiment. Total NH3-N volatilization from urea-treated soils were 50.3, 49.8 and 66.6% of applied N in Abu Bakr, Adam and M. Ismail soils, respectively. Significant reductions in NH3-N volatilization were observed in urea amended with TES and this reduction increased by increasing applied TES rate. The percentage inhibition in NH3-N loss as a result of application of different TES to tested soils ranged between 14.60-37.52, 75.28-84.52 and 70.00-77.42 in Abu Bakr, Adam and M. Ismail soils, respectively. The reduction in NH3-N loss by TES was accompanied by a decrease in soil pH and increase in concentrations of water soluble SO4 2-. It is concluded that application of TES by rates 0.1 and 0.5 tons ha-1 had significant effect in reducing ammonia volatilization from surface applied urea. Results of greenhouse experiment showed that TES application and T. thiooxidans inoculation had significant effects on biomass production and N uptake by corn plant. Soil inoculation without addition of S increased N uptake in both shoots and roots by 22.25 and 19.5%, respectively, and reflects the promoting role for bacteria on N uptake. TES application significantly increased N uptake by plant shoots and roots and more uptake was obtained with applied TES and inoculation with T. thiooxidans.

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Effect of blending urea with pyrite or coating urea with polymer on ammonia volatilization loss from surface-applied prilled urea

Cited by 23 publications

References 12 publications

Nitrogen Management in Calcareous Soils: Problems and Solutions

Nitrogen Management in Calcareous Soils: Problems and Solutions

Nitrogen losses from the soil/plant system: a review

Using Thiopaq Sulfur for Reducing Nh3 Volatilization From Calcareous Soils and Increasing N Use

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