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Ammonia Volatilization And Nitrogen Leaching Following Top

Di: Amelia

Abstract Ammonia volatilization (AV) is one of the main pathways of nitrogen (N) loss from a rice paddy, which results in low N use efficiency and many other environmental problems. Reduction of ammonia (NH 3) emission in agricultural systems is highly important from agronomic, ecologic, and economic standpoints. We studied NH 3 volatilization from surface applied urea and SuperU ® (urea containing urease and nitrification inhibitors) and its interaction with tillage system (conventional tillage and no-tillage) in a dryland arable soil. Agronomic However, the risk of nitrogen loss through ammonia (NH3) volatilisation and nitrate (NO3-) leaching is a concern with urea-based fertilisers. Chemical compounds such as nitrapyrin and maleic-itaconic acid copolymer can be added to inhibit transformations of

Nitrate, Nitrous Oxide, and Ammonia Loss Mitigation with

Contrasting effects of straw and biochar with equivalent straw input on ammonia volatilization and N leaching under alternate wetting and drying irrig In addition, CRN substantially reduced the peak amounts and ammonia volatilization rates of paddy fields under water-saving irrigation. The ammonia volatilization rate of paddy fields in the entire growth stage was significantly lower compared with those of traditional water and nitrogen management (p<0.05).

Ammonia Volatilization and Nitrogen Retention: How Deep to Incorporate ...

Effects of biochar application on nitrogen leaching, ammonia volatilization and nitrogen use eficiency in two distinct soils Zunqi Liu1,2 Tianyi He1,2 Ting Cao1,2 Tiexing Yang1,2 Jun Meng2*, and The importance of ammonia volatilization in estimating the efficacy of nitrification inhibitors to reduce N2O emissions: A global meta-analysis☆ Fig. 1. The nitrogen cycle as it relates to several nitrogen fertilizer sources (anhydrous ammonia, liquid UAN, urea) and their susceptibility to N loss mechanisms (volatilization, immobilization, denitrification, leaching).

Agricultural ammonia (NH3) emissions significantly reduce nitrogen (N) use efficiency (NUE) and adversely affect environmental quality. There is thus Ammonia volatilization and nitrogen leaching following top-dressing of urea from water-saving irrigated rice field: impact NH 3 of two-split surge irrigation Article Nov 2018 Junzeng Xu Boyi Liu Haiyu In situ field experiments were conducted to monitor ammonia (NH3) volatilization, surface runoff, and leaching loss in common nitrogen fertilizer and slow-release nitrogen fertilizer treatments.

Consequently, the concentrations of ammonium nitrogen (NH 4+ -N) and nitrate nitrogen (NO 3 ˉ-N) in the soil showed a significant increase following the application of base fertilizer (Fig. 6). Our objective was to develop an ammonia volatilization method within the DayCent ecosystem model that incorporates key 4R N management practices (right type, right rate, right placement, and right timing) that influence \ ( {\mathrm {NH}}_ {3}\) volatilization associated with application of urea-based nitrogen fertilizers to Applications of nitrogen (N) fertilizer from the Haber-Bosch N fixation and manure amendment can increase supply of soil N and hence substantially increase food production (Galloway et al., 2008; Gu et al., 2015; Liu et al., 2013; Zhang et al., 2017a). However, the increased N fertilizer enhances the risks of N losses through ammonia (NH 3) volatilization, N

N Loss Mechanisms and Nitrogen Use Efficiency

Article „Ammonia volatilization and nitrogen leaching following top-dressing of urea from water-saving irrigated rice field: impact of two-split surge irrigation“ Detailed information of the J-GLOBAL is an information service managed by the Japan Science and Technology Agency (hereinafter referred to as „JST“). It provides free access to secondary information on Pollution arising from ammonia volatilization in paddy fields could be reduced by using slow-release nitrogen fertilizers. In recent years, slow-release nitrogen fertilizers have been commonly used to replace conventional nitrogen fertilizers in the Taihu Lake region to reduce ammonia volatilization and improve nitrogen-use efficiency. To compare ammonia volatilization Ammonium (NH 4 +) and nitrate (NO 3 +) are major plant available forms of N in soil, the later having six times higher movement in and is therefore prone to leaching loss. Nitrate leaching down the soil profile results in low N use efficiency and contamination of underground water stream which is a major route of NO 3 entry into food

Ammonia (NH 3) is one of the most important by-products of N fertilizer application. The NH3 volatilization contributions to primary (direct) and secondary (precursor) pollutants together with their effects on air quality are rapidly being recognized as important components of air pollution budgets (Martin et al., 2006). Furthermore, the volatilized NH 3 also becomes a Urea is the most used nitrogen (N) fertilizer in rice fields. After fertilization, urea hydrolysis induces significant N losses by ammonia (NH3) volatilization. This demands NH3 mitigation measures such as the application of urease inhibitors. In this context, Duromide is a new urease inhibitor for urea treatment and represents an alternative to the more commonly Products with NBPT are designed to reduce ammonia volatilization from surface-applied urea or UAN. Urease inhibitors help prevent leaching and denitrification by slowing the conversion of ammonium to nitrate. By keeping N in the ammonium form, less

Abstract This study was conducted to determine the effect of biochar application on nitrogen (N) leaching, ammonia (NH3) volatilization, and fertilizer N use efficiency (NUE) in two soils N in soil the with different properties (loamy and sandy). Ryegrass (Lolium perenne L.) incubation experiments (with 15N-enriched urea applied) and an N loss simulation study were conducted at biochar

Excess nitrogen (N) fertilizer applied to crops, which discharges to the environment, principally through denitrification, runoff, leaching, and volatilization, results in a waste of resources and

Nitrogen Management: How Nitrogen is Lost and How to Protect It

Agronomic effects of urease and nitrification inhibitors on ammonia volatilization and nitrogen utilization in a dryland farming system: field and laboratory investigation. Abstract Ammonia (NH 3) volatilization is a major pathway of nitrogen (N) loss in agricultural systems worldwide, and is conducive to low fertilizer N use efficiency, environmental and health issues, and indirect nitrous oxide emission.

Ammonia (NH3) loss is only one of several ways nitrogen (N) can be lost from the plant environment. Nitrogen can leach below the root NH3 volatilization contributions to zone with water, nitrate can be reduced to gaseous forms in anaerobic environments, and NH3 can be lost to the atmosphere when N

Abstract Biochar is anticipated to be an effective option for mitigating nitrogen (N) leaching and improving the hydraulic characteristics of soil, particularly sandy soil. However, little attention has been paid to understanding the effect of biochar on N leaching and hydraulic conductivity (K) in fine-textured soil.

A Laboratory Evaluation of Ammonia Volatilization and Nitrate Leaching following Nitrogen Fertilizer Application on a Coarse-Textured Soil Nitrogen losses via ammonia volatilization following surface application of NH4 or NH4-forming N fertilizers are controlled by various soil, environmental, and fertilizer management factors as discussed in the following sections. A Laboratory Evaluation of Ammonia Volatilization and Nitrate Leaching following Nitrogen Fertilizer Application on a Coarse-Textured Soil

The study has the following objectives: (1) to determine ammonia volatilization potential as affected by urea-application rate under field conditions; (2) to determine the urea-derived nitrogen-leaching poten-tials in soil profiles as affected by urea-application rates and urea-application depths with different rainfall-simulated irrigation

Nitrous oxide (N2O) and ammonia (NH3) emission are the main pathways for gaseous nitrogen loss, which decrease fertilizer utilization while increasing

Organic farming has been proposed as a solution to foster agricultural sustainability and mitigate the negative environmental impacts of conventional farming. This study assessed N losses and soil surface N balances in conventional and organic farming systems in a sub-humid and semi-humid (Chuka and Thika) sites in Kenya. Nitrate–N (NO3−–N) leached was trapped Ammonia volatilization losses, nitrogen utilization Efficiency, and rice yields in response to urea application to a rice field were investigated in W

These products were applied to soil in chambers from which ammonia (NH 3) volatilization and nitrate (NO 3 –) leaching were measured over 31 d following fertilization.

Contrasting effects of straw and biochar with equivalent straw input on ammonia volatilization and N leaching under alternate wetting and drying irrig 2.2.4 Nitrous Oxide Denitrification, Ammonia Volatilization, and Nitrate Leaching Fluxes of N 2 O-N (referred to as N 2 O hereafter) from the soil were measured using non-steady-state stainless steel chambers (0.3 m wide by 0.5 m long) described by Venterea et al. (2005).