Response of microsprinkler-irrigated navel oranges to fertigated nitrogen rate and frequency
Identifieur interne : 002629 ( Main/Exploration ); précédent : 002628; suivant : 002630Response of microsprinkler-irrigated navel oranges to fertigated nitrogen rate and frequency
Auteurs : Ayako Kusakabe [États-Unis] ; Scott A. White [États-Unis] ; James L. Walworth [États-Unis] ; Glenn C. Wright [États-Unis] ; Thomas L. Thompson [États-Unis]Source :
- Soil Science Society of America journal [ 0361-5995 ] ; 2006.
Descripteurs français
- Pascal (Inist)
English descriptors
- KwdEn :
Abstract
Microsprinklers allow precise control of irrigation water applications and offer the potential for higher efficiency of water and fertilizer use compared with flood irrigation. A field experiment was conducted during 1999-2002 in central Arizona (AZ) to evaluate effects of various N rates and fertigation frequencies on fruit yield and quality, leaf N concentration, and residual soil N of 'Newhall' navel oranges (Citrus sinensis) on 'Carrizo' citrange (Porcirus trifoliata x Citrus sinensis) rootstock (planted in 1997) grown in a Gilman (coarse-loamy, mixed, superactive, calcareous, hyperthermic Typic Torrifluvents) fine sandy loam. The experiment included nonfertilized control plots and factorial combinations of three fertigation frequencies (27, 9, and 3 applications annually) and three N rates (68, 136, and 204 g N tree-1 yr-1). Maximum yields occurred at N rates of 105 to 153 g N tree-1 yr-1 for the fourth to the sixth growing seasons. The yield-maximizing N rates were equivalent to 17 to 34% of currently recommended N rates for citrus grown in AZ. Fruit and juice quality did not show significant response to N rate or fertigation frequency. Leaf N concentrations at yield-maximizing N rates were above the critical leaf tissue N range of 25 to 27 mg g-1, indicating that this range may be too low for these 'Newhall' navel orange trees. During all three seasons, higher residual soil NO3 concentrations resulted from the highest N rate. Our results suggest that optimum N rates for microsprinkler-irrigated 'Newhall' navel oranges in AZ are lower than currently recommended N rates.
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White</name><affiliation wicri:level="2"><inist:fA14 i1="01"><s1>Dep. of Soil, Water and Environmental Sci., Univ. of Arizona</s1><s2>Tucson, AZ 85721</s2><s3>USA</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>3 aut.</sZ><sZ>5 aut.</sZ></inist:fA14><country>États-Unis</country><placeName><region type="state">Arizona</region></placeName></affiliation></author><author><name sortKey="Walworth, James L" sort="Walworth, James L" uniqKey="Walworth J" first="James L." last="Walworth">James L. Walworth</name><affiliation wicri:level="2"><inist:fA14 i1="01"><s1>Dep. of Soil, Water and Environmental Sci., Univ. of Arizona</s1><s2>Tucson, AZ 85721</s2><s3>USA</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>3 aut.</sZ><sZ>5 aut.</sZ></inist:fA14><country>États-Unis</country><placeName><region type="state">Arizona</region></placeName></affiliation></author><author><name sortKey="Wright, Glenn C" sort="Wright, Glenn C" uniqKey="Wright G" first="Glenn C." last="Wright">Glenn C. Wright</name><affiliation wicri:level="2"><inist:fA14 i1="02"><s1>University of Arizona, Yuma Agricultural Center, 6425 W. 8th Street</s1><s2>Yuma, AZ 85364</s2><s3>USA</s3><sZ>4 aut.</sZ></inist:fA14><country>États-Unis</country><placeName><region type="state">Arizona</region></placeName></affiliation></author><author><name sortKey="Thompson, Thomas L" sort="Thompson, Thomas L" uniqKey="Thompson T" first="Thomas L." last="Thompson">Thomas L. Thompson</name><affiliation wicri:level="2"><inist:fA14 i1="01"><s1>Dep. of Soil, Water and Environmental Sci., Univ. of Arizona</s1><s2>Tucson, AZ 85721</s2><s3>USA</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>3 aut.</sZ><sZ>5 aut.</sZ></inist:fA14><country>États-Unis</country><placeName><region type="state">Arizona</region></placeName></affiliation></author></analytic><series><title level="j" type="main">Soil Science Society of America journal</title><title level="j" type="abbreviated">Soil Sci. Soc. Am. j.</title><idno type="ISSN">0361-5995</idno><imprint><date when="2006">2006</date></imprint></series></biblStruct></sourceDesc><seriesStmt><title level="j" type="main">Soil Science Society of America journal</title><title level="j" type="abbreviated">Soil Sci. Soc. Am. j.</title><idno type="ISSN">0361-5995</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Earth science</term><term>Soil science</term></keywords><keywords scheme="Pascal" xml:lang="fr"><term>Science terre</term><term>Science du sol</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Microsprinklers allow precise control of irrigation water applications and offer the potential for higher efficiency of water and fertilizer use compared with flood irrigation. A field experiment was conducted during 1999-2002 in central Arizona (AZ) to evaluate effects of various N rates and fertigation frequencies on fruit yield and quality, leaf N concentration, and residual soil N of 'Newhall' navel oranges (Citrus sinensis) on 'Carrizo' citrange (Porcirus trifoliata x Citrus sinensis) rootstock (planted in 1997) grown in a Gilman (coarse-loamy, mixed, superactive, calcareous, hyperthermic Typic Torrifluvents) fine sandy loam. The experiment included nonfertilized control plots and factorial combinations of three fertigation frequencies (27, 9, and 3 applications annually) and three N rates (68, 136, and 204 g N tree<sup>-1</sup> yr<sup>-1</sup>). Maximum yields occurred at N rates of 105 to 153 g N tree<sup>-1</sup> yr<sup>-1</sup> for the fourth to the sixth growing seasons. The yield-maximizing N rates were equivalent to 17 to 34% of currently recommended N rates for citrus grown in AZ. Fruit and juice quality did not show significant response to N rate or fertigation frequency. Leaf N concentrations at yield-maximizing N rates were above the critical leaf tissue N range of 25 to 27 mg g<sup>-1</sup>, indicating that this range may be too low for these 'Newhall' navel orange trees. During all three seasons, higher residual soil NO<sub>3</sub> concentrations resulted from the highest N rate. Our results suggest that optimum N rates for microsprinkler-irrigated 'Newhall' navel oranges in AZ are lower than currently recommended N rates.</div></front></TEI><affiliations><list><country><li>États-Unis</li></country><region><li>Arizona</li></region></list><tree><country name="États-Unis"><region name="Arizona"><name sortKey="Kusakabe, Ayako" sort="Kusakabe, Ayako" uniqKey="Kusakabe A" first="Ayako" last="Kusakabe">Ayako Kusakabe</name></region><name sortKey="Thompson, Thomas L" sort="Thompson, Thomas L" uniqKey="Thompson T" first="Thomas L." last="Thompson">Thomas L. Thompson</name><name sortKey="Walworth, James L" sort="Walworth, James L" uniqKey="Walworth J" first="James L." last="Walworth">James L. Walworth</name><name sortKey="White, Scott A" sort="White, Scott A" uniqKey="White S" first="Scott A." last="White">Scott A. White</name><name sortKey="Wright, Glenn C" sort="Wright, Glenn C" uniqKey="Wright G" first="Glenn C." last="Wright">Glenn C. Wright</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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