Nitrogen orgdiv2mineralization in a silandic andosol fertilized with dairy slurry and urea
Knowledge about the size and cycle of inorganic N pool on grasslands is necessary to develop adequate fertilization strategies and to determine the potential pathways of N losses. The objectives of this study were to: 1) quantify the N mineralization rates in permanent grassland on an Andosol of sou...
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Chilean Society of Soil Science / Sociedad Chilena de la Ciencia del Suelo
2015
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oai:scielo:S0718-951620150001000062015-06-08Nitrogen orgdiv2mineralization in a silandic andosol fertilized with dairy slurry and ureaMartínez-Lagos,JSalazar,FAlfaro,MRosas,MMacías,F Nitrogen mineralization grassland slurry urea Andosol Knowledge about the size and cycle of inorganic N pool on grasslands is necessary to develop adequate fertilization strategies and to determine the potential pathways of N losses. The objectives of this study were to: 1) quantify the N mineralization rates in permanent grassland on an Andosol of southern Chile; and 2) determine the effect of high N application rates as urea and dairy slurry on this process. Mineralization was measured over a three years period on grassland fertilized with 400 kg N ha-1 yr-1 by acetylene inhibition method, incubating soil cores under field conditions. Subsequently, a laboratory assay was carried out to determine potential residual N mineralization rate by anaerobic incubation method. Higher N mineralization was measured on the urea treated plots (314 - 420 kg NH4+-N ha-1 yr-1) followed by slurry (320 - 344 kg NH4+-N ha-1 yr-1) (p<0.05). Most of the N was mineralized during spring and summer seasons (p<0.05). Laboratory results indicate that slurry treated soil had greater net potential N mineralization rates than urea (p<0.05). Results suggest that in Andosols of southern Chile, N mineralization can be a major N input into the soil N budget, with implications for grassland fertilizer managements and pathways of N lossinfo:eu-repo/semantics/openAccessChilean Society of Soil Science / Sociedad Chilena de la Ciencia del SueloJournal of soil science and plant nutrition v.15 n.1 20152015-03-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-95162015000100006en10.4067/S0718-95162015005000006 |
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Scielo Chile |
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Scielo Chile |
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English |
topic |
Nitrogen mineralization grassland slurry urea Andosol |
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Nitrogen mineralization grassland slurry urea Andosol Martínez-Lagos,J Salazar,F Alfaro,M Rosas,M Macías,F Nitrogen orgdiv2mineralization in a silandic andosol fertilized with dairy slurry and urea |
description |
Knowledge about the size and cycle of inorganic N pool on grasslands is necessary to develop adequate fertilization strategies and to determine the potential pathways of N losses. The objectives of this study were to: 1) quantify the N mineralization rates in permanent grassland on an Andosol of southern Chile; and 2) determine the effect of high N application rates as urea and dairy slurry on this process. Mineralization was measured over a three years period on grassland fertilized with 400 kg N ha-1 yr-1 by acetylene inhibition method, incubating soil cores under field conditions. Subsequently, a laboratory assay was carried out to determine potential residual N mineralization rate by anaerobic incubation method. Higher N mineralization was measured on the urea treated plots (314 - 420 kg NH4+-N ha-1 yr-1) followed by slurry (320 - 344 kg NH4+-N ha-1 yr-1) (p<0.05). Most of the N was mineralized during spring and summer seasons (p<0.05). Laboratory results indicate that slurry treated soil had greater net potential N mineralization rates than urea (p<0.05). Results suggest that in Andosols of southern Chile, N mineralization can be a major N input into the soil N budget, with implications for grassland fertilizer managements and pathways of N loss |
author |
Martínez-Lagos,J Salazar,F Alfaro,M Rosas,M Macías,F |
author_facet |
Martínez-Lagos,J Salazar,F Alfaro,M Rosas,M Macías,F |
author_sort |
Martínez-Lagos,J |
title |
Nitrogen orgdiv2mineralization in a silandic andosol fertilized with dairy slurry and urea |
title_short |
Nitrogen orgdiv2mineralization in a silandic andosol fertilized with dairy slurry and urea |
title_full |
Nitrogen orgdiv2mineralization in a silandic andosol fertilized with dairy slurry and urea |
title_fullStr |
Nitrogen orgdiv2mineralization in a silandic andosol fertilized with dairy slurry and urea |
title_full_unstemmed |
Nitrogen orgdiv2mineralization in a silandic andosol fertilized with dairy slurry and urea |
title_sort |
nitrogen orgdiv2mineralization in a silandic andosol fertilized with dairy slurry and urea |
publisher |
Chilean Society of Soil Science / Sociedad Chilena de la Ciencia del Suelo |
publishDate |
2015 |
url |
http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-95162015000100006 |
work_keys_str_mv |
AT martinezlagosj nitrogenorgdiv2mineralizationinasilandicandosolfertilizedwithdairyslurryandurea AT salazarf nitrogenorgdiv2mineralizationinasilandicandosolfertilizedwithdairyslurryandurea AT alfarom nitrogenorgdiv2mineralizationinasilandicandosolfertilizedwithdairyslurryandurea AT rosasm nitrogenorgdiv2mineralizationinasilandicandosolfertilizedwithdairyslurryandurea AT maciasf nitrogenorgdiv2mineralizationinasilandicandosolfertilizedwithdairyslurryandurea |
_version_ |
1714206505412067328 |