Nitrogen best management practice for citrus trees. I. Fruit yield, quality, and leaf nutritional status
Identifieur interne : 000582 ( PascalFrancis/Corpus ); précédent : 000581; suivant : 000583Nitrogen best management practice for citrus trees. I. Fruit yield, quality, and leaf nutritional status
Auteurs : A. K. Alva ; S. Paramasivam ; T. A. Obreza ; A. W. SchumannSource :
- Scientia horticulturae [ 0304-4238 ] ; 2006.
Descripteurs français
- Pascal (Inist)
English descriptors
- KwdEn :
Abstract
Elevated levels of nitrate-nitrogen (NO3-N) in the surficial aquifer above the drinking water quality standard, i.e. maximum contaminant limit (MCL; 10 mg L-1), have been reported in some part of central Florida citrus production regions. Soils in this region are very sandy (sand content >95%), hence are vulnerable to leaching of soluble nutrients and chemicals below the rooting depth of the trees. The objective of this research was to develop N and irrigation best management practices for citrus in sandy soils to maintain optimal crop yield and quality, and to minimize potential leaching of nitrate below the root zone. Six years of field experiment was conducted in a high productive (mean fruit yield > 80 Mg ha-1yr-1) >20-year-old 'Hamlin' orange trees [Citrus sinensis (L.) Osbeck] on 'Cleopatra mandarin' (Citrus reticulata Blanco) rootstock grown on a well drained Tavares fine sand (hyperthermic, uncoated, Typic Quartzipsamments) in Highland county, FL. Nitrogen rates ranged from 112 to 280 kg ha-1 yr-1 applied as fertigation (FRT), water soluble granular (WSG), 50:50 mix of FRT and WSG, and controlled-release fertilizer (CRF). Tensiometers were used to monitor the soil water content as a basis to schedule optimal irrigation. Fruit yield response over the entire range of N rates was greater for the FRT and WSG sources as compared to that for the WSG + FRT or CRF sources. Using the regression analysis of the fruit yield in relation to N rate, the optimum N rate appeared to be at 260 kg ha-1 yr-1. Based on fruit production response in this study, the N requirement for production of 1 Mg of fruit varied from 2.2 to 2.6 kg across four N sources. This study demonstrated an increased N uptake efficiency, as a result of best management of N and irrigation applications. The optimal N and K concentration in the 4-6-month-old spring flush leaves were 26-30, and 15-18 g kg-1, respectively. However, fruit yield response showed no significant relationship with concentrations of P in the 4-6-month-old spring flush leaves over a range of 0.8-2.4 g kg-1. The results of fate and transport of N in soil and in soil solution with application of different rates and sources of N, and components of citrus tree N budget, are reported in a companion paper.
Notice en format standard (ISO 2709)
Pour connaître la documentation sur le format Inist Standard.
| pA |
|
|---|
Format Inist (serveur)
| NO : | PASCAL 06-0133973 INIST |
|---|---|
| ET : | Nitrogen best management practice for citrus trees. I. Fruit yield, quality, and leaf nutritional status |
| AU : | ALVA (A. K.); PARAMASIVAM (S.); OBREZA (T. A.); SCHUMANN (A. W.) |
| AF : | USDA-Agriculture Research Service, 24106 N. Bunn Road/Prosser, WA 99350/Etats-Unis (1 aut.); Savannah State University, Environmental Sciences & Biotech Research, Drew Griffith Hall/Savannah, GA 31404/Etats-Unis (2 aut.); University of Florida, Institute of Food and Agricultural Sciences, Soil and Water Science Department/Gainesville, FL 32611-0290/Etats-Unis (3 aut.); University of Florida, Institute of Food and Agricultural Sciences, Citrus Research and Education Center/Lake Alfred, FL 33850/Etats-Unis (4 aut.) |
| DT : | Publication en série; Niveau analytique |
| SO : | Scientia horticulturae; ISSN 0304-4238; Coden SHRTAH; Pays-Bas; Da. 2006; Vol. 107; No. 3; Pp. 233-244; Bibl. 1 p.1/4 |
| LA : | Anglais |
| EA : | Elevated levels of nitrate-nitrogen (NO3-N) in the surficial aquifer above the drinking water quality standard, i.e. maximum contaminant limit (MCL; 10 mg L-1), have been reported in some part of central Florida citrus production regions. Soils in this region are very sandy (sand content >95%), hence are vulnerable to leaching of soluble nutrients and chemicals below the rooting depth of the trees. The objective of this research was to develop N and irrigation best management practices for citrus in sandy soils to maintain optimal crop yield and quality, and to minimize potential leaching of nitrate below the root zone. Six years of field experiment was conducted in a high productive (mean fruit yield > 80 Mg ha-1yr-1) >20-year-old 'Hamlin' orange trees [Citrus sinensis (L.) Osbeck] on 'Cleopatra mandarin' (Citrus reticulata Blanco) rootstock grown on a well drained Tavares fine sand (hyperthermic, uncoated, Typic Quartzipsamments) in Highland county, FL. Nitrogen rates ranged from 112 to 280 kg ha-1 yr-1 applied as fertigation (FRT), water soluble granular (WSG), 50:50 mix of FRT and WSG, and controlled-release fertilizer (CRF). Tensiometers were used to monitor the soil water content as a basis to schedule optimal irrigation. Fruit yield response over the entire range of N rates was greater for the FRT and WSG sources as compared to that for the WSG + FRT or CRF sources. Using the regression analysis of the fruit yield in relation to N rate, the optimum N rate appeared to be at 260 kg ha-1 yr-1. Based on fruit production response in this study, the N requirement for production of 1 Mg of fruit varied from 2.2 to 2.6 kg across four N sources. This study demonstrated an increased N uptake efficiency, as a result of best management of N and irrigation applications. The optimal N and K concentration in the 4-6-month-old spring flush leaves were 26-30, and 15-18 g kg-1, respectively. However, fruit yield response showed no significant relationship with concentrations of P in the 4-6-month-old spring flush leaves over a range of 0.8-2.4 g kg-1. The results of fate and transport of N in soil and in soil solution with application of different rates and sources of N, and components of citrus tree N budget, are reported in a companion paper. |
| CC : | 002A32C02C; 002A32C03B |
| FD : | Fertilisation azotée; Code bonne pratique; Arbre fruitier; Qualité production; Fruit; Rendement; Feuille végétal; Valeur nutritive; Eau souterraine; Rutaceae; Agrume; Azote; Floride; Qualité eau; Nitrate; Eau potable |
| FG : | Dicotyledones; Angiospermae; Spermatophyta; Etats Unis; Amérique du Nord; Amérique |
| ED : | Nitrogen fertilization; Code of practice; Fruit tree; Production quality; Fruit; Yield; Plant leaf; Nutritive value; Ground water; Rutaceae; Citrus fruit; Nitrogen; Florida; Water quality; Nitrates; Drinking water |
| EG : | Dicotyledones; Angiospermae; Spermatophyta; United States; North America; America |
| SD : | Fertilización nitrogenada; Arbol frutal; Calidad producción; Fruto; Rendimiento; Hoja vegetal; Valor nutritivo; Agua subterránea; Rutaceae; Agrios; Nitrógeno; Florida; Calidad agua; Nitrato; Agua potable |
| LO : | INIST-16233.354000133193230030 |
| ID : | 06-0133973 |
Links to Exploration step
Pascal:06-0133973Le document en format XML
<record><TEI><teiHeader><fileDesc><titleStmt><title xml:lang="en" level="a">Nitrogen best management practice for citrus trees. I. Fruit yield, quality, and leaf nutritional status</title><author><name sortKey="Alva, A K" sort="Alva, A K" uniqKey="Alva A" first="A. K." last="Alva">A. K. Alva</name><affiliation><inist:fA14 i1="01"><s1>USDA-Agriculture Research Service, 24106 N. Bunn Road</s1><s2>Prosser, WA 99350</s2><s3>USA</s3><sZ>1 aut.</sZ></inist:fA14></affiliation></author><author><name sortKey="Paramasivam, S" sort="Paramasivam, S" uniqKey="Paramasivam S" first="S." last="Paramasivam">S. Paramasivam</name><affiliation><inist:fA14 i1="02"><s1>Savannah State University, Environmental Sciences & Biotech Research, Drew Griffith Hall</s1><s2>Savannah, GA 31404</s2><s3>USA</s3><sZ>2 aut.</sZ></inist:fA14></affiliation></author><author><name sortKey="Obreza, T A" sort="Obreza, T A" uniqKey="Obreza T" first="T. A." last="Obreza">T. A. Obreza</name><affiliation><inist:fA14 i1="03"><s1>University of Florida, Institute of Food and Agricultural Sciences, Soil and Water Science Department</s1><s2>Gainesville, FL 32611-0290</s2><s3>USA</s3><sZ>3 aut.</sZ></inist:fA14></affiliation></author><author><name sortKey="Schumann, A W" sort="Schumann, A W" uniqKey="Schumann A" first="A. W." last="Schumann">A. W. Schumann</name><affiliation><inist:fA14 i1="04"><s1>University of Florida, Institute of Food and Agricultural Sciences, Citrus Research and Education Center</s1><s2>Lake Alfred, FL 33850</s2><s3>USA</s3><sZ>4 aut.</sZ></inist:fA14></affiliation></author></titleStmt><publicationStmt><idno type="wicri:source">INIST</idno><idno type="inist">06-0133973</idno><date when="2006">2006</date><idno type="stanalyst">PASCAL 06-0133973 INIST</idno><idno type="RBID">Pascal:06-0133973</idno><idno type="wicri:Area/PascalFrancis/Corpus">000582</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en" level="a">Nitrogen best management practice for citrus trees. I. Fruit yield, quality, and leaf nutritional status</title><author><name sortKey="Alva, A K" sort="Alva, A K" uniqKey="Alva A" first="A. K." last="Alva">A. K. Alva</name><affiliation><inist:fA14 i1="01"><s1>USDA-Agriculture Research Service, 24106 N. Bunn Road</s1><s2>Prosser, WA 99350</s2><s3>USA</s3><sZ>1 aut.</sZ></inist:fA14></affiliation></author><author><name sortKey="Paramasivam, S" sort="Paramasivam, S" uniqKey="Paramasivam S" first="S." last="Paramasivam">S. Paramasivam</name><affiliation><inist:fA14 i1="02"><s1>Savannah State University, Environmental Sciences & Biotech Research, Drew Griffith Hall</s1><s2>Savannah, GA 31404</s2><s3>USA</s3><sZ>2 aut.</sZ></inist:fA14></affiliation></author><author><name sortKey="Obreza, T A" sort="Obreza, T A" uniqKey="Obreza T" first="T. A." last="Obreza">T. A. Obreza</name><affiliation><inist:fA14 i1="03"><s1>University of Florida, Institute of Food and Agricultural Sciences, Soil and Water Science Department</s1><s2>Gainesville, FL 32611-0290</s2><s3>USA</s3><sZ>3 aut.</sZ></inist:fA14></affiliation></author><author><name sortKey="Schumann, A W" sort="Schumann, A W" uniqKey="Schumann A" first="A. W." last="Schumann">A. W. Schumann</name><affiliation><inist:fA14 i1="04"><s1>University of Florida, Institute of Food and Agricultural Sciences, Citrus Research and Education Center</s1><s2>Lake Alfred, FL 33850</s2><s3>USA</s3><sZ>4 aut.</sZ></inist:fA14></affiliation></author></analytic><series><title level="j" type="main">Scientia horticulturae</title><title level="j" type="abbreviated">Sci. hortic.</title><idno type="ISSN">0304-4238</idno><imprint><date when="2006">2006</date></imprint></series></biblStruct></sourceDesc><seriesStmt><title level="j" type="main">Scientia horticulturae</title><title level="j" type="abbreviated">Sci. hortic.</title><idno type="ISSN">0304-4238</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Citrus fruit</term><term>Code of practice</term><term>Drinking water</term><term>Florida</term><term>Fruit</term><term>Fruit tree</term><term>Ground water</term><term>Nitrates</term><term>Nitrogen</term><term>Nitrogen fertilization</term><term>Nutritive value</term><term>Plant leaf</term><term>Production quality</term><term>Rutaceae</term><term>Water quality</term><term>Yield</term></keywords><keywords scheme="Pascal" xml:lang="fr"><term>Fertilisation azotée</term><term>Code bonne pratique</term><term>Arbre fruitier</term><term>Qualité production</term><term>Fruit</term><term>Rendement</term><term>Feuille végétal</term><term>Valeur nutritive</term><term>Eau souterraine</term><term>Rutaceae</term><term>Agrume</term><term>Azote</term><term>Floride</term><term>Qualité eau</term><term>Nitrate</term><term>Eau potable</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Elevated levels of nitrate-nitrogen (NO<sub>3</sub>-N) in the surficial aquifer above the drinking water quality standard, i.e. maximum contaminant limit (MCL; 10 mg L<sup>-1</sup>), have been reported in some part of central Florida citrus production regions. Soils in this region are very sandy (sand content >95%), hence are vulnerable to leaching of soluble nutrients and chemicals below the rooting depth of the trees. The objective of this research was to develop N and irrigation best management practices for citrus in sandy soils to maintain optimal crop yield and quality, and to minimize potential leaching of nitrate below the root zone. Six years of field experiment was conducted in a high productive (mean fruit yield > 80 Mg ha<sup>-1</sup>yr<sup>-1</sup>) >20-year-old 'Hamlin' orange trees [Citrus sinensis (L.) Osbeck] on 'Cleopatra mandarin' (Citrus reticulata Blanco) rootstock grown on a well drained Tavares fine sand (hyperthermic, uncoated, Typic Quartzipsamments) in Highland county, FL. Nitrogen rates ranged from 112 to 280 kg ha<sup>-1</sup> yr<sup>-1</sup> applied as fertigation (FRT), water soluble granular (WSG), 50:50 mix of FRT and WSG, and controlled-release fertilizer (CRF). Tensiometers were used to monitor the soil water content as a basis to schedule optimal irrigation. Fruit yield response over the entire range of N rates was greater for the FRT and WSG sources as compared to that for the WSG + FRT or CRF sources. Using the regression analysis of the fruit yield in relation to N rate, the optimum N rate appeared to be at 260 kg ha<sup>-1</sup> yr<sup>-1</sup>. Based on fruit production response in this study, the N requirement for production of 1 Mg of fruit varied from 2.2 to 2.6 kg across four N sources. This study demonstrated an increased N uptake efficiency, as a result of best management of N and irrigation applications. The optimal N and K concentration in the 4-6-month-old spring flush leaves were 26-30, and 15-18 g kg<sup>-1</sup>, respectively. However, fruit yield response showed no significant relationship with concentrations of P in the 4-6-month-old spring flush leaves over a range of 0.8-2.4 g kg<sup>-1</sup>. The results of fate and transport of N in soil and in soil solution with application of different rates and sources of N, and components of citrus tree N budget, are reported in a companion paper.</div></front></TEI><inist><standard h6="B"><pA><fA01 i1="01" i2="1"><s0>0304-4238</s0></fA01><fA02 i1="01"><s0>SHRTAH</s0></fA02><fA03 i2="1"><s0>Sci. hortic.</s0></fA03><fA05><s2>107</s2></fA05><fA06><s2>3</s2></fA06><fA08 i1="01" i2="1" l="ENG"><s1>Nitrogen best management practice for citrus trees. I. Fruit yield, quality, and leaf nutritional status</s1></fA08><fA11 i1="01" i2="1"><s1>ALVA (A. K.)</s1></fA11><fA11 i1="02" i2="1"><s1>PARAMASIVAM (S.)</s1></fA11><fA11 i1="03" i2="1"><s1>OBREZA (T. A.)</s1></fA11><fA11 i1="04" i2="1"><s1>SCHUMANN (A. W.)</s1></fA11><fA14 i1="01"><s1>USDA-Agriculture Research Service, 24106 N. Bunn Road</s1><s2>Prosser, WA 99350</s2><s3>USA</s3><sZ>1 aut.</sZ></fA14><fA14 i1="02"><s1>Savannah State University, Environmental Sciences & Biotech Research, Drew Griffith Hall</s1><s2>Savannah, GA 31404</s2><s3>USA</s3><sZ>2 aut.</sZ></fA14><fA14 i1="03"><s1>University of Florida, Institute of Food and Agricultural Sciences, Soil and Water Science Department</s1><s2>Gainesville, FL 32611-0290</s2><s3>USA</s3><sZ>3 aut.</sZ></fA14><fA14 i1="04"><s1>University of Florida, Institute of Food and Agricultural Sciences, Citrus Research and Education Center</s1><s2>Lake Alfred, FL 33850</s2><s3>USA</s3><sZ>4 aut.</sZ></fA14><fA20><s1>233-244</s1></fA20><fA21><s1>2006</s1></fA21><fA23 i1="01"><s0>ENG</s0></fA23><fA43 i1="01"><s1>INIST</s1><s2>16233</s2><s5>354000133193230030</s5></fA43><fA44><s0>0000</s0><s1>© 2006 INIST-CNRS. All rights reserved.</s1></fA44><fA45><s0>1 p.1/4</s0></fA45><fA47 i1="01" i2="1"><s0>06-0133973</s0></fA47><fA60><s1>P</s1></fA60><fA61><s0>A</s0></fA61><fA64 i1="01" i2="1"><s0>Scientia horticulturae</s0></fA64><fA66 i1="01"><s0>NLD</s0></fA66><fC01 i1="01" l="ENG"><s0>Elevated levels of nitrate-nitrogen (NO<sub>3</sub>-N) in the surficial aquifer above the drinking water quality standard, i.e. maximum contaminant limit (MCL; 10 mg L<sup>-1</sup>), have been reported in some part of central Florida citrus production regions. Soils in this region are very sandy (sand content >95%), hence are vulnerable to leaching of soluble nutrients and chemicals below the rooting depth of the trees. The objective of this research was to develop N and irrigation best management practices for citrus in sandy soils to maintain optimal crop yield and quality, and to minimize potential leaching of nitrate below the root zone. Six years of field experiment was conducted in a high productive (mean fruit yield > 80 Mg ha<sup>-1</sup>yr<sup>-1</sup>) >20-year-old 'Hamlin' orange trees [Citrus sinensis (L.) Osbeck] on 'Cleopatra mandarin' (Citrus reticulata Blanco) rootstock grown on a well drained Tavares fine sand (hyperthermic, uncoated, Typic Quartzipsamments) in Highland county, FL. Nitrogen rates ranged from 112 to 280 kg ha<sup>-1</sup> yr<sup>-1</sup> applied as fertigation (FRT), water soluble granular (WSG), 50:50 mix of FRT and WSG, and controlled-release fertilizer (CRF). Tensiometers were used to monitor the soil water content as a basis to schedule optimal irrigation. Fruit yield response over the entire range of N rates was greater for the FRT and WSG sources as compared to that for the WSG + FRT or CRF sources. Using the regression analysis of the fruit yield in relation to N rate, the optimum N rate appeared to be at 260 kg ha<sup>-1</sup> yr<sup>-1</sup>. Based on fruit production response in this study, the N requirement for production of 1 Mg of fruit varied from 2.2 to 2.6 kg across four N sources. This study demonstrated an increased N uptake efficiency, as a result of best management of N and irrigation applications. The optimal N and K concentration in the 4-6-month-old spring flush leaves were 26-30, and 15-18 g kg<sup>-1</sup>, respectively. However, fruit yield response showed no significant relationship with concentrations of P in the 4-6-month-old spring flush leaves over a range of 0.8-2.4 g kg<sup>-1</sup>. The results of fate and transport of N in soil and in soil solution with application of different rates and sources of N, and components of citrus tree N budget, are reported in a companion paper.</s0></fC01><fC02 i1="01" i2="X"><s0>002A32C02C</s0></fC02><fC02 i1="02" i2="X"><s0>002A32C03B</s0></fC02><fC03 i1="01" i2="X" l="FRE"><s0>Fertilisation azotée</s0><s5>01</s5></fC03><fC03 i1="01" i2="X" l="ENG"><s0>Nitrogen fertilization</s0><s5>01</s5></fC03><fC03 i1="01" i2="X" l="SPA"><s0>Fertilización nitrogenada</s0><s5>01</s5></fC03><fC03 i1="02" i2="X" l="FRE"><s0>Code bonne pratique</s0><s5>02</s5></fC03><fC03 i1="02" i2="X" l="ENG"><s0>Code of practice</s0><s5>02</s5></fC03><fC03 i1="03" i2="X" l="FRE"><s0>Arbre fruitier</s0><s5>03</s5></fC03><fC03 i1="03" i2="X" l="ENG"><s0>Fruit tree</s0><s5>03</s5></fC03><fC03 i1="03" i2="X" l="SPA"><s0>Arbol frutal</s0><s5>03</s5></fC03><fC03 i1="04" i2="X" l="FRE"><s0>Qualité production</s0><s5>04</s5></fC03><fC03 i1="04" i2="X" l="ENG"><s0>Production quality</s0><s5>04</s5></fC03><fC03 i1="04" i2="X" l="SPA"><s0>Calidad producción</s0><s5>04</s5></fC03><fC03 i1="05" i2="X" l="FRE"><s0>Fruit</s0><s5>05</s5></fC03><fC03 i1="05" i2="X" l="ENG"><s0>Fruit</s0><s5>05</s5></fC03><fC03 i1="05" i2="X" l="SPA"><s0>Fruto</s0><s5>05</s5></fC03><fC03 i1="06" i2="X" l="FRE"><s0>Rendement</s0><s5>06</s5></fC03><fC03 i1="06" i2="X" l="ENG"><s0>Yield</s0><s5>06</s5></fC03><fC03 i1="06" i2="X" l="SPA"><s0>Rendimiento</s0><s5>06</s5></fC03><fC03 i1="07" i2="X" l="FRE"><s0>Feuille végétal</s0><s5>07</s5></fC03><fC03 i1="07" i2="X" l="ENG"><s0>Plant leaf</s0><s5>07</s5></fC03><fC03 i1="07" i2="X" l="SPA"><s0>Hoja vegetal</s0><s5>07</s5></fC03><fC03 i1="08" i2="X" l="FRE"><s0>Valeur nutritive</s0><s5>08</s5></fC03><fC03 i1="08" i2="X" l="ENG"><s0>Nutritive value</s0><s5>08</s5></fC03><fC03 i1="08" i2="X" l="SPA"><s0>Valor nutritivo</s0><s5>08</s5></fC03><fC03 i1="09" i2="X" l="FRE"><s0>Eau souterraine</s0><s5>09</s5></fC03><fC03 i1="09" i2="X" l="ENG"><s0>Ground water</s0><s5>09</s5></fC03><fC03 i1="09" i2="X" l="SPA"><s0>Agua subterránea</s0><s5>09</s5></fC03><fC03 i1="10" i2="X" l="FRE"><s0>Rutaceae</s0><s2>NS</s2><s5>10</s5></fC03><fC03 i1="10" i2="X" l="ENG"><s0>Rutaceae</s0><s2>NS</s2><s5>10</s5></fC03><fC03 i1="10" i2="X" l="SPA"><s0>Rutaceae</s0><s2>NS</s2><s5>10</s5></fC03><fC03 i1="11" i2="X" l="FRE"><s0>Agrume</s0><s5>11</s5></fC03><fC03 i1="11" i2="X" l="ENG"><s0>Citrus fruit</s0><s5>11</s5></fC03><fC03 i1="11" i2="X" l="SPA"><s0>Agrios</s0><s5>11</s5></fC03><fC03 i1="12" i2="X" l="FRE"><s0>Azote</s0><s2>NC</s2><s5>15</s5></fC03><fC03 i1="12" i2="X" l="ENG"><s0>Nitrogen</s0><s2>NC</s2><s5>15</s5></fC03><fC03 i1="12" i2="X" l="SPA"><s0>Nitrógeno</s0><s2>NC</s2><s5>15</s5></fC03><fC03 i1="13" i2="X" l="FRE"><s0>Floride</s0><s2>NG</s2><s5>20</s5></fC03><fC03 i1="13" i2="X" l="ENG"><s0>Florida</s0><s2>NG</s2><s5>20</s5></fC03><fC03 i1="13" i2="X" l="SPA"><s0>Florida</s0><s2>NG</s2><s5>20</s5></fC03><fC03 i1="14" i2="X" l="FRE"><s0>Qualité eau</s0><s5>28</s5></fC03><fC03 i1="14" i2="X" l="ENG"><s0>Water quality</s0><s5>28</s5></fC03><fC03 i1="14" i2="X" l="SPA"><s0>Calidad agua</s0><s5>28</s5></fC03><fC03 i1="15" i2="X" l="FRE"><s0>Nitrate</s0><s2>NA</s2><s2>FX</s2><s5>29</s5></fC03><fC03 i1="15" i2="X" l="ENG"><s0>Nitrates</s0><s2>NA</s2><s2>FX</s2><s5>29</s5></fC03><fC03 i1="15" i2="X" l="SPA"><s0>Nitrato</s0><s2>NA</s2><s2>FX</s2><s5>29</s5></fC03><fC03 i1="16" i2="X" l="FRE"><s0>Eau potable</s0><s5>30</s5></fC03><fC03 i1="16" i2="X" l="ENG"><s0>Drinking water</s0><s5>30</s5></fC03><fC03 i1="16" i2="X" l="SPA"><s0>Agua potable</s0><s5>30</s5></fC03><fC07 i1="01" i2="X" l="FRE"><s0>Dicotyledones</s0><s2>NS</s2></fC07><fC07 i1="01" i2="X" l="ENG"><s0>Dicotyledones</s0><s2>NS</s2></fC07><fC07 i1="01" i2="X" l="SPA"><s0>Dicotyledones</s0><s2>NS</s2></fC07><fC07 i1="02" i2="X" l="FRE"><s0>Angiospermae</s0><s2>NS</s2></fC07><fC07 i1="02" i2="X" l="ENG"><s0>Angiospermae</s0><s2>NS</s2></fC07><fC07 i1="02" i2="X" l="SPA"><s0>Angiospermae</s0><s2>NS</s2></fC07><fC07 i1="03" i2="X" l="FRE"><s0>Spermatophyta</s0><s2>NS</s2></fC07><fC07 i1="03" i2="X" l="ENG"><s0>Spermatophyta</s0><s2>NS</s2></fC07><fC07 i1="03" i2="X" l="SPA"><s0>Spermatophyta</s0><s2>NS</s2></fC07><fC07 i1="04" i2="X" l="FRE"><s0>Etats Unis</s0><s2>NG</s2></fC07><fC07 i1="04" i2="X" l="ENG"><s0>United States</s0><s2>NG</s2></fC07><fC07 i1="04" i2="X" l="SPA"><s0>Estados Unidos</s0><s2>NG</s2></fC07><fC07 i1="05" i2="X" l="FRE"><s0>Amérique du Nord</s0><s2>NG</s2></fC07><fC07 i1="05" i2="X" l="ENG"><s0>North America</s0><s2>NG</s2></fC07><fC07 i1="05" i2="X" l="SPA"><s0>America del norte</s0><s2>NG</s2></fC07><fC07 i1="06" i2="X" l="FRE"><s0>Amérique</s0><s2>NG</s2></fC07><fC07 i1="06" i2="X" l="ENG"><s0>America</s0><s2>NG</s2></fC07><fC07 i1="06" i2="X" l="SPA"><s0>America</s0><s2>NG</s2></fC07><fN21><s1>086</s1></fN21><fN44 i1="01"><s1>OTO</s1></fN44><fN82><s1>OTO</s1></fN82></pA></standard><server><NO>PASCAL 06-0133973 INIST</NO><ET>Nitrogen best management practice for citrus trees. I. Fruit yield, quality, and leaf nutritional status</ET><AU>ALVA (A. K.); PARAMASIVAM (S.); OBREZA (T. A.); SCHUMANN (A. W.)</AU><AF>USDA-Agriculture Research Service, 24106 N. Bunn Road/Prosser, WA 99350/Etats-Unis (1 aut.); Savannah State University, Environmental Sciences & Biotech Research, Drew Griffith Hall/Savannah, GA 31404/Etats-Unis (2 aut.); University of Florida, Institute of Food and Agricultural Sciences, Soil and Water Science Department/Gainesville, FL 32611-0290/Etats-Unis (3 aut.); University of Florida, Institute of Food and Agricultural Sciences, Citrus Research and Education Center/Lake Alfred, FL 33850/Etats-Unis (4 aut.)</AF><DT>Publication en série; Niveau analytique</DT><SO>Scientia horticulturae; ISSN 0304-4238; Coden SHRTAH; Pays-Bas; Da. 2006; Vol. 107; No. 3; Pp. 233-244; Bibl. 1 p.1/4</SO><LA>Anglais</LA><EA>Elevated levels of nitrate-nitrogen (NO<sub>3</sub>-N) in the surficial aquifer above the drinking water quality standard, i.e. maximum contaminant limit (MCL; 10 mg L<sup>-1</sup>), have been reported in some part of central Florida citrus production regions. Soils in this region are very sandy (sand content >95%), hence are vulnerable to leaching of soluble nutrients and chemicals below the rooting depth of the trees. The objective of this research was to develop N and irrigation best management practices for citrus in sandy soils to maintain optimal crop yield and quality, and to minimize potential leaching of nitrate below the root zone. Six years of field experiment was conducted in a high productive (mean fruit yield > 80 Mg ha<sup>-1</sup>yr<sup>-1</sup>) >20-year-old 'Hamlin' orange trees [Citrus sinensis (L.) Osbeck] on 'Cleopatra mandarin' (Citrus reticulata Blanco) rootstock grown on a well drained Tavares fine sand (hyperthermic, uncoated, Typic Quartzipsamments) in Highland county, FL. Nitrogen rates ranged from 112 to 280 kg ha<sup>-1</sup> yr<sup>-1</sup> applied as fertigation (FRT), water soluble granular (WSG), 50:50 mix of FRT and WSG, and controlled-release fertilizer (CRF). Tensiometers were used to monitor the soil water content as a basis to schedule optimal irrigation. Fruit yield response over the entire range of N rates was greater for the FRT and WSG sources as compared to that for the WSG + FRT or CRF sources. Using the regression analysis of the fruit yield in relation to N rate, the optimum N rate appeared to be at 260 kg ha<sup>-1</sup> yr<sup>-1</sup>. Based on fruit production response in this study, the N requirement for production of 1 Mg of fruit varied from 2.2 to 2.6 kg across four N sources. This study demonstrated an increased N uptake efficiency, as a result of best management of N and irrigation applications. The optimal N and K concentration in the 4-6-month-old spring flush leaves were 26-30, and 15-18 g kg<sup>-1</sup>, respectively. However, fruit yield response showed no significant relationship with concentrations of P in the 4-6-month-old spring flush leaves over a range of 0.8-2.4 g kg<sup>-1</sup>. The results of fate and transport of N in soil and in soil solution with application of different rates and sources of N, and components of citrus tree N budget, are reported in a companion paper.</EA><CC>002A32C02C; 002A32C03B</CC><FD>Fertilisation azotée; Code bonne pratique; Arbre fruitier; Qualité production; Fruit; Rendement; Feuille végétal; Valeur nutritive; Eau souterraine; Rutaceae; Agrume; Azote; Floride; Qualité eau; Nitrate; Eau potable</FD><FG>Dicotyledones; Angiospermae; Spermatophyta; Etats Unis; Amérique du Nord; Amérique</FG><ED>Nitrogen fertilization; Code of practice; Fruit tree; Production quality; Fruit; Yield; Plant leaf; Nutritive value; Ground water; Rutaceae; Citrus fruit; Nitrogen; Florida; Water quality; Nitrates; Drinking water</ED><EG>Dicotyledones; Angiospermae; Spermatophyta; United States; North America; America</EG><SD>Fertilización nitrogenada; Arbol frutal; Calidad producción; Fruto; Rendimiento; Hoja vegetal; Valor nutritivo; Agua subterránea; Rutaceae; Agrios; Nitrógeno; Florida; Calidad agua; Nitrato; Agua potable</SD><LO>INIST-16233.354000133193230030</LO><ID>06-0133973</ID></server></inist></record>Pour manipuler ce document sous Unix (Dilib)
EXPLOR_STEP=$WICRI_ROOT/Wicri/Bois/explor/OrangerV1/Data/PascalFrancis/Corpus
HfdSelect -h $EXPLOR_STEP/biblio.hfd -nk 000582 | SxmlIndent | more
Ou
HfdSelect -h $EXPLOR_AREA/Data/PascalFrancis/Corpus/biblio.hfd -nk 000582 | SxmlIndent | more
Pour mettre un lien sur cette page dans le réseau Wicri
{{Explor lien
|wiki= Wicri/Bois
|area= OrangerV1
|flux= PascalFrancis
|étape= Corpus
|type= RBID
|clé= Pascal:06-0133973
|texte= Nitrogen best management practice for citrus trees. I. Fruit yield, quality, and leaf nutritional status
}}
| This area was generated with Dilib version V0.6.25. |  |