Nitrogen volatilization and mineralization in a sandy entisol of Florida under citrus
Identifieur interne : 002B38 ( Main/Curation ); précédent : 002B37; suivant : 002B39Nitrogen volatilization and mineralization in a sandy entisol of Florida under citrus
Auteurs : D. Jr Mattos [Brésil] ; A. K. Alva [États-Unis] ; S. Paramasivam [États-Unis] ; D. A. Graetz [États-Unis]Source :
- Communications in soil science and plant analysis [ 0010-3624 ] ; 2003.
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Abstract
Increasingly nitrate nitrogen (NO3-N) is found in excess of maximum contaminant limit (MCL) in groundwater adjacent to citrus production areas of central Florida. Understanding of fate of N in the environment following the application of fertilizers is critical to improve nutrient uptake efficiency, minimize nutrient losses and reduce the adverse effects on the groundwater. A study evaluated ammonia volatilization (NH3) and effects of ammonium nitrate (AN) and urea (UR) on N budget of citrus trees on a sandy Entisol. Dry granular N fertilizers were surface applied to irrigated 'Hamlin' orange trees. Ammonia volatilization was evaluated using a semi-open NH3 trapping system with and without additional air circulation, while net N mineralization and leaching losses were evaluated using in situ incubations with polyvinyl chloride (PVC) columns. Significant N losses by NH3volatilization were observed from applied N fertilizers, which accounted for up to 13% of applied N as AN. and 33% as UR with additional air circulation in the collection chamber. These values were significantly greater than those observed with no additional air circulation. Maximum rates of NH3 volatilization occurred within 5 d after fertilizer application and were greater during the day than during the evening. This study demonstrated that fertilizer use efficiency is reduced due to increased gaseous losses of NH3 when urea is used, and that N fertilization affects soil N mineralization in a short time period after fertilizer application. Fertilization decreased N mineralization and increased the amount of soil microbial biomass N during incubation. Leaching of N accounted to 13% of applied N during a 90-d period.
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Alva</name><affiliation wicri:level="2"><inist:fA14 i1="02"><s1>USDA ARS, Vegetable and Forage Crop Research Unit</s1><s2>Prosser, Washington</s2><s3>USA</s3><sZ>2 aut.</sZ></inist:fA14><country>États-Unis</country><placeName><region type="state">Washington (État)</region></placeName></affiliation></author><author><name sortKey="Paramasivam, S" sort="Paramasivam, S" uniqKey="Paramasivam S" first="S." last="Paramasivam">S. Paramasivam</name><affiliation wicri:level="2"><inist:fA14 i1="03"><s1>Savannah State University, Marine Environmental Science and Biotechnology Research Center</s1><s2>Savannah, Georgia</s2><s3>USA</s3><sZ>3 aut.</sZ></inist:fA14><country>États-Unis</country><placeName><region type="state">Géorgie (États-Unis)</region></placeName></affiliation></author><author><name sortKey="Graetz, D A" sort="Graetz, D A" uniqKey="Graetz D" first="D. A." last="Graetz">D. A. Graetz</name><affiliation wicri:level="2"><inist:fA14 i1="04"><s1>University of Florida, Soil and Water Science Department</s1><s2>Gainesville, Florida</s2><s3>USA</s3><sZ>4 aut.</sZ></inist:fA14><country>États-Unis</country><placeName><region type="state">Floride</region></placeName></affiliation></author></titleStmt><publicationStmt><idno type="wicri:source">INIST</idno><idno type="inist">04-0014752</idno><date when="2003">2003</date><idno type="stanalyst">PASCAL 04-0014752 INIST</idno><idno type="RBID">Pascal:04-0014752</idno><idno type="wicri:Area/PascalFrancis/Corpus">000721</idno><idno type="wicri:Area/PascalFrancis/Curation">000283</idno><idno type="wicri:Area/PascalFrancis/Checkpoint">000717</idno><idno type="wicri:doubleKey">0010-3624:2003:Mattos D:nitrogen:volatilization:and</idno><idno type="wicri:Area/Main/Merge">002D03</idno><idno type="wicri:Area/Main/Curation">002B38</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en" level="a">Nitrogen volatilization and mineralization in a sandy entisol of Florida under citrus</title><author><name sortKey="Mattos, D Jr" sort="Mattos, D Jr" uniqKey="Mattos D" first="D. Jr" last="Mattos">D. Jr Mattos</name><affiliation wicri:level="2"><inist:fA14 i1="01"><s1>Centro de Citricultura Sylvio Moreira-IAC, Cordeirópolis</s1><s2>SP</s2><s3>BRA</s3><sZ>1 aut.</sZ></inist:fA14><country>Brésil</country><placeName><region type="state">État de São Paulo</region></placeName></affiliation></author><author><name sortKey="Alva, A K" sort="Alva, A K" uniqKey="Alva A" first="A. K." last="Alva">A. K. Alva</name><affiliation wicri:level="2"><inist:fA14 i1="02"><s1>USDA ARS, Vegetable and Forage Crop Research Unit</s1><s2>Prosser, Washington</s2><s3>USA</s3><sZ>2 aut.</sZ></inist:fA14><country>États-Unis</country><placeName><region type="state">Washington (État)</region></placeName></affiliation></author><author><name sortKey="Paramasivam, S" sort="Paramasivam, S" uniqKey="Paramasivam S" first="S." last="Paramasivam">S. Paramasivam</name><affiliation wicri:level="2"><inist:fA14 i1="03"><s1>Savannah State University, Marine Environmental Science and Biotechnology Research Center</s1><s2>Savannah, Georgia</s2><s3>USA</s3><sZ>3 aut.</sZ></inist:fA14><country>États-Unis</country><placeName><region type="state">Géorgie (États-Unis)</region></placeName></affiliation></author><author><name sortKey="Graetz, D A" sort="Graetz, D A" uniqKey="Graetz D" first="D. A." last="Graetz">D. A. Graetz</name><affiliation wicri:level="2"><inist:fA14 i1="04"><s1>University of Florida, Soil and Water Science Department</s1><s2>Gainesville, Florida</s2><s3>USA</s3><sZ>4 aut.</sZ></inist:fA14><country>États-Unis</country><placeName><region type="state">Floride</region></placeName></affiliation></author></analytic><series><title level="j" type="main">Communications in soil science and plant analysis</title><title level="j" type="abbreviated">Commun. soil sci. plant anal.</title><idno type="ISSN">0010-3624</idno><imprint><date when="2003">2003</date></imprint></series></biblStruct></sourceDesc><seriesStmt><title level="j" type="main">Communications in soil science and plant analysis</title><title level="j" type="abbreviated">Commun. soil sci. plant anal.</title><idno type="ISSN">0010-3624</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Ammonia</term><term>Ammonium Nitrates</term><term>Citrus sinensis</term><term>Florida</term><term>Leaching</term><term>Loss</term><term>Microbial biomass</term><term>Mineralization</term><term>Nitrogen cycle</term><term>Nitrogen fertilization</term><term>Nutrient recovery</term><term>Orchard</term><term>Sandy soil</term><term>Urea</term><term>Volatilization</term><term>Water pollution</term></keywords><keywords scheme="Pascal" xml:lang="fr"><term>Pollution eau</term><term>Fertilisation azotée</term><term>Volatilisation</term><term>Minéralisation</term><term>Verger</term><term>Efficacité nutriment</term><term>Lessivage</term><term>Perte</term><term>Biomasse microbienne</term><term>Citrus sinensis</term><term>Urée</term><term>Ammoniac</term><term>Ammonium Nitrate</term><term>Floride</term><term>Sol sableux</term><term>Cycle azote</term><term>Poncirus trifoliata Citrus paradisi</term><term>Quartzipsamment</term></keywords><keywords scheme="Wicri" type="topic" xml:lang="fr"><term>Verger</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Increasingly nitrate nitrogen (NO<sub>3</sub>-N) is found in excess of maximum contaminant limit (MCL) in groundwater adjacent to citrus production areas of central Florida. Understanding of fate of N in the environment following the application of fertilizers is critical to improve nutrient uptake efficiency, minimize nutrient losses and reduce the adverse effects on the groundwater. A study evaluated ammonia volatilization (NH<sub>3</sub>) and effects of ammonium nitrate (AN) and urea (UR) on N budget of citrus trees on a sandy Entisol. Dry granular N fertilizers were surface applied to irrigated 'Hamlin' orange trees. Ammonia volatilization was evaluated using a semi-open NH<sub>3</sub> trapping system with and without additional air circulation, while net N mineralization and leaching losses were evaluated using in situ incubations with polyvinyl chloride (PVC) columns. Significant N losses by NH<sub>3</sub>volatilization were observed from applied N fertilizers, which accounted for up to 13% of applied N as AN. and 33% as UR with additional air circulation in the collection chamber. These values were significantly greater than those observed with no additional air circulation. Maximum rates of NH<sub>3</sub> volatilization occurred within 5 d after fertilizer application and were greater during the day than during the evening. This study demonstrated that fertilizer use efficiency is reduced due to increased gaseous losses of NH<sub>3</sub> when urea is used, and that N fertilization affects soil N mineralization in a short time period after fertilizer application. Fertilization decreased N mineralization and increased the amount of soil microbial biomass N during incubation. Leaching of N accounted to 13% of applied N during a 90-d period.</div></front></TEI></record>Pour manipuler ce document sous Unix (Dilib)
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