Modelling the release and loss of nitrogen after the incorporation of vegetable crop residues

A computer model is described that is able to simulate the mineralization-immobilization turnover of nitrogen derived from vegetable crop residues added to soil. Once mineralized, N is subject to loss from soil in the model by leaching and denitrification. That the mineralization part of the model works well is demonstrated with reference to some pot experiments in which residues from Brussels sprouts, leeks, cabbage or spinach were mixed with either a sandy or clay soil and incubated at 20 degrees C under optimal moisture conditions for 48 weeks. The release of mineral N was measured at intervals during the experiment and was strongly dependent upon the amount of N added in the crop residues: spinach (C:N = 6) released most nitrogen and most quickly, the other residues (C:N = 13-15) released N more slowly. With adaptations for field conditions, the model was then used to elucidate the fate of nitrogen remaining after field vegetables. The dynamics of both mineral and organic N remaining in soil were traced with this model. After spinach, much nitrate leaches to groundwater; sprouts, however, appear able to immobilize or denitrify what little mineral N remains at harvest reducing the loading of N in percolating water. The model suggests that during the last 40 years over winter losses of nitrate after cabbage almost always exceeded the EC drinking water limit of 11.3 mg NO3-N/litre: in some years by a factor of four. Since mineral N remaining in soil at harvest is shown to have most influence on leaching losses, measures taken to reduce unused mineral N will probably benefit groundwater quality most.

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Main Author: Whitmore, A.P.
Format: Article/Letter to editor biblioteca
Language:English
Subjects:leaching, models, nitrogen, outdoor cropping, research, soil, bodem, modellen, onderzoek, stikstof, uitspoelen, vollegrondsteelt,
Online Access:https://research.wur.nl/en/publications/modelling-the-release-and-loss-of-nitrogen-after-the-incorporatio
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spelling dig-wur-nl-wurpubs-3024452024-12-04 Whitmore, A.P. Article/Letter to editor Netherlands Journal of Agricultural Science 44 (1996) 1 ISSN: 0028-2928 Modelling the release and loss of nitrogen after the incorporation of vegetable crop residues 1996 A computer model is described that is able to simulate the mineralization-immobilization turnover of nitrogen derived from vegetable crop residues added to soil. Once mineralized, N is subject to loss from soil in the model by leaching and denitrification. That the mineralization part of the model works well is demonstrated with reference to some pot experiments in which residues from Brussels sprouts, leeks, cabbage or spinach were mixed with either a sandy or clay soil and incubated at 20 degrees C under optimal moisture conditions for 48 weeks. The release of mineral N was measured at intervals during the experiment and was strongly dependent upon the amount of N added in the crop residues: spinach (C:N = 6) released most nitrogen and most quickly, the other residues (C:N = 13-15) released N more slowly. With adaptations for field conditions, the model was then used to elucidate the fate of nitrogen remaining after field vegetables. The dynamics of both mineral and organic N remaining in soil were traced with this model. After spinach, much nitrate leaches to groundwater; sprouts, however, appear able to immobilize or denitrify what little mineral N remains at harvest reducing the loading of N in percolating water. The model suggests that during the last 40 years over winter losses of nitrate after cabbage almost always exceeded the EC drinking water limit of 11.3 mg NO3-N/litre: in some years by a factor of four. Since mineral N remaining in soil at harvest is shown to have most influence on leaching losses, measures taken to reduce unused mineral N will probably benefit groundwater quality most. en application/pdf https://research.wur.nl/en/publications/modelling-the-release-and-loss-of-nitrogen-after-the-incorporatio 10.18174/njas.v44i1.559 https://edepot.wur.nl/44710 leaching models nitrogen outdoor cropping research soil bodem modellen onderzoek stikstof uitspoelen vollegrondsteelt Wageningen University & Research
institution WUR NL
collection DSpace
country Países bajos
countrycode NL
component Bibliográfico
access En linea
databasecode dig-wur-nl
tag biblioteca
region Europa del Oeste
libraryname WUR Library Netherlands
language English
topic leaching
models
nitrogen
outdoor cropping
research
soil
bodem
modellen
onderzoek
stikstof
uitspoelen
vollegrondsteelt
leaching
models
nitrogen
outdoor cropping
research
soil
bodem
modellen
onderzoek
stikstof
uitspoelen
vollegrondsteelt
spellingShingle leaching
models
nitrogen
outdoor cropping
research
soil
bodem
modellen
onderzoek
stikstof
uitspoelen
vollegrondsteelt
leaching
models
nitrogen
outdoor cropping
research
soil
bodem
modellen
onderzoek
stikstof
uitspoelen
vollegrondsteelt
Whitmore, A.P.
Modelling the release and loss of nitrogen after the incorporation of vegetable crop residues
description A computer model is described that is able to simulate the mineralization-immobilization turnover of nitrogen derived from vegetable crop residues added to soil. Once mineralized, N is subject to loss from soil in the model by leaching and denitrification. That the mineralization part of the model works well is demonstrated with reference to some pot experiments in which residues from Brussels sprouts, leeks, cabbage or spinach were mixed with either a sandy or clay soil and incubated at 20 degrees C under optimal moisture conditions for 48 weeks. The release of mineral N was measured at intervals during the experiment and was strongly dependent upon the amount of N added in the crop residues: spinach (C:N = 6) released most nitrogen and most quickly, the other residues (C:N = 13-15) released N more slowly. With adaptations for field conditions, the model was then used to elucidate the fate of nitrogen remaining after field vegetables. The dynamics of both mineral and organic N remaining in soil were traced with this model. After spinach, much nitrate leaches to groundwater; sprouts, however, appear able to immobilize or denitrify what little mineral N remains at harvest reducing the loading of N in percolating water. The model suggests that during the last 40 years over winter losses of nitrate after cabbage almost always exceeded the EC drinking water limit of 11.3 mg NO3-N/litre: in some years by a factor of four. Since mineral N remaining in soil at harvest is shown to have most influence on leaching losses, measures taken to reduce unused mineral N will probably benefit groundwater quality most.
format Article/Letter to editor
topic_facet leaching
models
nitrogen
outdoor cropping
research
soil
bodem
modellen
onderzoek
stikstof
uitspoelen
vollegrondsteelt
author Whitmore, A.P.
author_facet Whitmore, A.P.
author_sort Whitmore, A.P.
title Modelling the release and loss of nitrogen after the incorporation of vegetable crop residues
title_short Modelling the release and loss of nitrogen after the incorporation of vegetable crop residues
title_full Modelling the release and loss of nitrogen after the incorporation of vegetable crop residues
title_fullStr Modelling the release and loss of nitrogen after the incorporation of vegetable crop residues
title_full_unstemmed Modelling the release and loss of nitrogen after the incorporation of vegetable crop residues
title_sort modelling the release and loss of nitrogen after the incorporation of vegetable crop residues
url https://research.wur.nl/en/publications/modelling-the-release-and-loss-of-nitrogen-after-the-incorporatio
work_keys_str_mv AT whitmoreap modellingthereleaseandlossofnitrogenaftertheincorporationofvegetablecropresidues
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