Soluble organic nitrogen in agricultural soils

Murphy, Daniel V.; Macdonald, A. J.; Stockdale, E.; Goulding, K. W. T.; Fortune, S.; Gaunt, J. L.; Poulton, P. R.; Wakefield, James A.; Webster, Collin A.; Wilmer, W. S.

doi:10.1007/s003740050018

Cited by 282 publications

(190 citation statements)

References 96 publications

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“…Another important fraction coming out of the mineralization process is the water-soluble N. Soluble organic N (SON) is a part of the organic N extracted from soils by water or salt solutions [76]. It is highly labile N, and could be used by crops directly or after transformation to mineral N [121].…”

Section: Transformation Of Carbon and Nitrogen During Decompositionmentioning

confidence: 99%

“…Research into soil organic N mineralization has focused on inorganic N, with limited consideration of SON in the leachates. However, some researchers have found that the pool of SON was of equal size to soluble inorganic N [76], and it became important to evaluate the SON content and its contribution during N mineralization. Some researchers reported that the initial net N mineralization rate from organic amendments was most closely correlated (r = 0.76) with the water-soluble N content, for a broad variety of plant materials in soil [52].…”

Section: Transformation Of Carbon and Nitrogen During Decompositionmentioning

confidence: 99%

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How Important is the Quality of Organic Amendments in Relation to Mineral N Availability in Soils?

et al. 2013

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Summary Wastes generated from municipal and agricultural activities have the tremendous potential for application in agriculture as a source of nutrients and as amendments to improve soil organic matter (SOM). A decline in SOM can represent a serious threat to soil fertility and quality. Nitrogen (N) mineralization from organic amendments is important for understanding the N dynamics in terrestrial ecosystems. In this review, quality of the amendments such as C/N ration, N content, and biochemical compositions, etc. are discussed. Since, C/N ratio cannot explain all differences in N mineralization; emphasis has been laid on characterizing different compounds in organic amendments that govern the mineralization process. The importance of simulation models has also been described in modeling N mineralization from some complex materials like compost, animal manures and farmyard manures. These complex simulation models once modified according to the quality of the organic amendments can simulate N mineralization and thus, they can be used for simulating N dynamics in terrestrial eco-systems.

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Section: Transformation Of Carbon and Nitrogen During Decompositionmentioning

confidence: 99%

Section: Transformation Of Carbon and Nitrogen During Decompositionmentioning

confidence: 99%

How Important is the Quality of Organic Amendments in Relation to Mineral N Availability in Soils?

et al. 2013

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“…Leaching of DON into water bodies can lead to eutrophication and acidification, and pose a potential risk to human health (Jordan et al 1997). DON significantly contributes to N leaching losses from forest ecosystems (Campbell et al 2000;Qualls et al 2000;Perakis and Hedin 2002), and may be an important form of N losses from agricultural systems (Murphy et al 2000;McDowell 2003;Siemens and kaupenjohann 2002;Saarijarvi et al 2007). Compared to NO 3 -N, there are only a limited number of studies on DON leaching losses from agricultural soils (Ghani et al 2007;Kessel et al 2009).…”

Section: Introductionmentioning

confidence: 99%

“…It was also found that there were more DON losses in a pasture with multiple grass species than that with a single grass species under application of inorganic fertilizers. The Rothamsted experiment indicated that fertilization increased loss of DON (Murphy et al 2000). The effects of cropping rotations on DON concentration and its losses have been investigated by few studies (Chantigny 2003).…”

Section: Introductionmentioning

confidence: 99%

Leaching losses of nitrate nitrogen and dissolved organic nitrogen from a yearly two crops system, wheat-maize, under monsoon situations

Huang

Liang

Ouyang

et al. 2011

Nutr Cycl Agroecosyst

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A large amount of nitrogen (N) fertilizers applied to the winter wheat-summer maize double cropping systems in the North China Plain (NCP) contributes largely to N leaching to the groundwater. A series of field experiments were carried out during October 2004 and September 2007 in a lysimeter field to reveal the temporal changes of N leaching losses below 2-m depth from this land system as well as the effects of N fertilizer application rates on N leaching. Four N rates (0, 180, 260, and 360 kg N ha -1 as urea) were applied in the study area. Seasonal leachate volumes were 87 and 72 mm in the first and second maize season, respectively, and 13 and 4 mm during the winter wheat and maize season in the third rotational year, respectively. The average seasonal flow-weighted NO 3 -N concentrations in leachate for the four N fertilizer application rates ranged from 8.1 to 103.7 mg N l -1 , and seasonal flow-weighted dissolved organic nitrogen (DON) concentrations in leachate varied from 0.8 to 6.0 mg N l -1 . Total amounts of NO 3 -N leaching lost throughout the 3 years were in the range of 14.6 to 177.8 kg ha -1 for the four N application rates, corresponding to N leaching losses in the range of 4.0-7.6% of the fertilizers applied. DON losses throughout the 3 years were 1.4, 2.1, 3.6, and 6.3 kg N ha -1 for the four corresponding fertilization rates. The application rate of 180 kg N ha -1 was recommended based on the balance between reducing N leaching and maintaining crop yields. The results indicated that there is a potential risk of N leaching during the winter wheat season, and over-fertilization of chemical N can result in substantial N leaching losses by high-intensity rainfalls in summer.

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“…Most of the studies carried out worldwide have focussed on nitrate leaching (i.e. Misselbrook et al, 1996); however, recent studies have shown organic N leaching occurring from soils (i.e., Hawkins and Scholefield, 2000;Murphy et al, 2000), with no published information about it under Chilean conditions. The objective of this study was to assess N leaching losses on an andisoil of Southern Chile with the application of different types of fertilizer.…”

Section: Introductionmentioning

confidence: 99%

Nitrogen Leaching Losses on a Volcanic Ash Soil as Affected by the Source of Fertiliser

Alfaro

et al. 2006

R.C. Suelo Nutr. Veg.

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Pérdidas de nitrógeno por lixiviación por efecto de la fuente del fertilizante en un suelo derivado de cenizas volcánicasKeywords: fish sludge, dairy slurry, inorganic fertilizer, water quality ABSTRACTAn intact lysimeters study was carried out to measure the potential nitrogen (N) losses on an andisoil of Southern Chile with different fertilisers. The treatments tested were: fish slurry (FS), dairy slurry (DS), potassium nitrate (IF) and a control treatment (C), with no N addition. An equivalent amount of 150 kg of total N ha -1 was applied to each lysimeter and then the equivalent to 1260 mm of rainfall was irrigated over a 90 days period. Leachate samples were analysed for nitrate, nitrite, ammonia and organic N (No). Total N losses were calculated as the product between drainage and the respective N concentration in the leachates. Lowest N losses were obtained in the control and FS treatments (66 kg N ha -1 ) and the greatest amount was obtained in the IF treatment (261 kg N ha -1 ). Nitrogen was mainly lost as nitrate and No (each was 49% of the total N losses). High soil organic matter of andisoils can be more relevant than fertiliser for N leaching losses. RESUMENUn experimento con lisímetros intactos se llevó a cabo para medir el potencial de pérdida de nitrógeno (N) en un andisol del sur de Chile con diferentes fertilizantes. Los tratamientos evaluados fueron purín de pescado (FS), purín de lechería (DS), nitrato de potasio (IF) y un tratamiento control (C), sin adición de N. Se aplicó una dosis equivalente a 150 kg ha -1 de N total a cada lisímetro y luego estos fueron regados con el equivalente a 1260 mm de lluvia distribuida en un periodo de 90 días. Las muestras de lixiviado fueron analizadas para nitrato, nitrito, amonio y N orgánico (No). Las pérdidas totales de N fueron calculadas como el producto del drenaje colectado y su respectiva concentración de N en la muestra. Las pérdidas más bajas de N se obtuvieron en el tratamiento control y en el tratamiento FS (66 kg N ha -1 ), y las pérdidas más altas se obtuvieron el tratamiento IF (261 kg N ha -1 ). El nitrógeno fue perdido principalmente como nitrato y como No (cada uno representó el 49% del total de las pérdidas). El alto contenido de materia orgánica de un andisol puede ser más relevante para las pérdidas de N por lixiviación que el tipo de fertilizante utilizado.

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Soluble organic nitrogen in agricultural soils

Cited by 282 publications

References 96 publications

How Important is the Quality of Organic Amendments in Relation to Mineral N Availability in Soils?

How Important is the Quality of Organic Amendments in Relation to Mineral N Availability in Soils?

Leaching losses of nitrate nitrogen and dissolved organic nitrogen from a yearly two crops system, wheat-maize, under monsoon situations

Nitrogen Leaching Losses on a Volcanic Ash Soil as Affected by the Source of Fertiliser

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