Response of microsprinkler-irrigated navel oranges to fertigated nitrogen rate and frequency
Identifieur interne : 000443 ( PascalFrancis/Corpus ); précédent : 000442; suivant : 000444Response of microsprinkler-irrigated navel oranges to fertigated nitrogen rate and frequency
Auteurs : Ayako Kusakabe ; Scott A. White ; James L. Walworth ; Glenn C. Wright ; Thomas L. ThompsonSource :
- 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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Format Inist (serveur)
NO : | PASCAL 07-0499500 INIST |
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ET : | Response of microsprinkler-irrigated navel oranges to fertigated nitrogen rate and frequency |
AU : | KUSAKABE (Ayako); WHITE (Scott A.); WALWORTH (James L.); WRIGHT (Glenn C.); THOMPSON (Thomas L.) |
AF : | Dep. of Soil, Water and Environmental Sci., Univ. of Arizona/Tucson, AZ 85721/Etats-Unis (1 aut., 2 aut., 3 aut., 5 aut.); University of Arizona, Yuma Agricultural Center, 6425 W. 8th Street/Yuma, AZ 85364/Etats-Unis (4 aut.) |
DT : | Publication en série; Niveau analytique |
SO : | Soil Science Society of America journal; ISSN 0361-5995; Coden SSSJD4; Etats-Unis; Da. 2006; Vol. 70; No. 5; Pp. 1623-1628; Bibl. 24 ref. |
LA : | Anglais |
EA : | 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. |
CC : | 001E01P03; 002A32B; 226C03 |
FD : | Science terre; Science du sol |
ED : | Earth science; Soil science |
SD : | Ciencia tierra; Ciencia del suelo |
LO : | INIST-6109.354000157105520210 |
ID : | 07-0499500 |
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Pascal:07-0499500Le document en format XML
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<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>
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yr<sup>-1</sup>
). Maximum yields occurred at N rates of 105 to 153 g N tree<sup>-1</sup>
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<server><NO>PASCAL 07-0499500 INIST</NO>
<ET>Response of microsprinkler-irrigated navel oranges to fertigated nitrogen rate and frequency</ET>
<AU>KUSAKABE (Ayako); WHITE (Scott A.); WALWORTH (James L.); WRIGHT (Glenn C.); THOMPSON (Thomas L.)</AU>
<AF>Dep. of Soil, Water and Environmental Sci., Univ. of Arizona/Tucson, AZ 85721/Etats-Unis (1 aut., 2 aut., 3 aut., 5 aut.); University of Arizona, Yuma Agricultural Center, 6425 W. 8th Street/Yuma, AZ 85364/Etats-Unis (4 aut.)</AF>
<DT>Publication en série; Niveau analytique</DT>
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<EA>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.</EA>
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