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Response of microsprinkler-irrigated navel oranges to fertigated nitrogen rate and frequency

Identifieur interne : 000443 ( PascalFrancis/Corpus ); précédent : 000442; suivant : 000444

Response 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. Thompson

Source :

RBID : Pascal:07-0499500

Descripteurs français

English descriptors

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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A11 02  1    @1 WHITE (Scott A.)
A11 03  1    @1 WALWORTH (James L.)
A11 04  1    @1 WRIGHT (Glenn C.)
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C01 01    ENG  @0 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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NO : PASCAL 07-0499500 INIST
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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<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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<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>
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<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
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<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>
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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>
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