Winter Drought Stress Can Delay Flowering and Avoid Immature Fruit Loss during Late-season Mechanical Harvesting of 'Valencia' Oranges
Identifieur interne : 001C44 ( Main/Exploration ); précédent : 001C43; suivant : 001C45Winter Drought Stress Can Delay Flowering and Avoid Immature Fruit Loss during Late-season Mechanical Harvesting of 'Valencia' Oranges
Auteurs : Juan Carlos Melgar [États-Unis] ; Jill M. Dunlop [États-Unis] ; L. Gene Albrigo [États-Unis] ; James P. Syvertsen [États-Unis]Source :
- HortScience [ 0018-5345 ] ; 2010.
Descripteurs français
- Pascal (Inist)
- Wicri :
- topic : Sécheresse, Fruit, Horticulture.
English descriptors
- KwdEn :
Abstract
We determined if winter drought stress could delay flowering and fruit development of immature 'Valencia' sweet oranges to avoid young fruit loss during late-season mechanical harvesting. Beginning in December over three consecutive seasons (2007-2009), Tyvek® water-resistive barrier material was used as a rain shield groundcover under 13- to 15-year-old trees. There were three treatments: 1) drought = no irrigation and covered soil; 2) rain only = no irrigation, no cover; and 3) normal irrigation with rain and no cover. Covers were removed in February or March and normal irrigation and fertilization were resumed. The drought stress did not affect fruit yield, size, percentage juice, or juice quality of the current crop harvested in May and June relative to continuously irrigated trees. Drought stress delayed flowering by 2 to 4 weeks so that the immature fruit for next season's crop were smaller than on continuously irrigated trees during June but fruit growth caught up by September. During mechanical harvesting, previously drought-stressed trees lost fewer young fruit than continuously irrigated trees. Thus, winter drought stress effectively delayed flowering and avoided young fruit loss during late-season mechanical harvesting without negative impacts on yield or fruit quality of 'Valencia' orange trees.
Affiliations:
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Dunlop</name><affiliation wicri:level="2"><inist:fA14 i1="01"><s1>University of Florida, IFAS, Horticultural Sciences Department, Citrus Research and Education Center, 700 Experiment Station Road</s1><s2>Lake Alfred, FL 33880</s2><s3>USA</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>3 aut.</sZ><sZ>4 aut.</sZ></inist:fA14><country>États-Unis</country><placeName><region type="state">Floride</region></placeName></affiliation></author><author><name sortKey="Gene Albrigo, L" sort="Gene Albrigo, L" uniqKey="Gene Albrigo L" first="L." last="Gene Albrigo">L. Gene Albrigo</name><affiliation wicri:level="2"><inist:fA14 i1="01"><s1>University of Florida, IFAS, Horticultural Sciences Department, Citrus Research and Education Center, 700 Experiment Station Road</s1><s2>Lake Alfred, FL 33880</s2><s3>USA</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>3 aut.</sZ><sZ>4 aut.</sZ></inist:fA14><country>États-Unis</country><placeName><region type="state">Floride</region></placeName></affiliation></author><author><name sortKey="Syvertsen, James P" sort="Syvertsen, James P" uniqKey="Syvertsen J" first="James P." last="Syvertsen">James P. Syvertsen</name><affiliation wicri:level="2"><inist:fA14 i1="01"><s1>University of Florida, IFAS, Horticultural Sciences Department, Citrus Research and Education Center, 700 Experiment Station Road</s1><s2>Lake Alfred, FL 33880</s2><s3>USA</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>3 aut.</sZ><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">HortScience</title><title level="j" type="abbreviated">HortScience</title><idno type="ISSN">0018-5345</idno><imprint><date when="2010">2010</date></imprint></series></biblStruct></sourceDesc><seriesStmt><title level="j" type="main">HortScience</title><title level="j" type="abbreviated">HortScience</title><idno type="ISSN">0018-5345</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Abscission</term><term>Canopy(vegetation)</term><term>Citrus sinensis</term><term>Drought</term><term>Flowering</term><term>Fruit</term><term>Horticulture</term><term>Immaturity</term><term>Late</term><term>Mechanical harvesting</term><term>Orange</term><term>Quality</term><term>Season</term><term>Water stress</term></keywords><keywords scheme="Pascal" xml:lang="fr"><term>Sécheresse</term><term>Stress hydrique</term><term>Floraison</term><term>Immaturité</term><term>Fruit</term><term>Tardif</term><term>Saison</term><term>Récolte mécanique</term><term>Canopée</term><term>Citrus sinensis</term><term>Orange</term><term>Abscission</term><term>Qualité</term><term>Horticulture</term><term><<>></term></keywords><keywords scheme="Wicri" type="topic" xml:lang="fr"><term>Sécheresse</term><term>Fruit</term><term>Horticulture</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">We determined if winter drought stress could delay flowering and fruit development of immature 'Valencia' sweet oranges to avoid young fruit loss during late-season mechanical harvesting. Beginning in December over three consecutive seasons (2007-2009), Tyvek® water-resistive barrier material was used as a rain shield groundcover under 13- to 15-year-old trees. There were three treatments: 1) drought = no irrigation and covered soil; 2) rain only = no irrigation, no cover; and 3) normal irrigation with rain and no cover. Covers were removed in February or March and normal irrigation and fertilization were resumed. The drought stress did not affect fruit yield, size, percentage juice, or juice quality of the current crop harvested in May and June relative to continuously irrigated trees. Drought stress delayed flowering by 2 to 4 weeks so that the immature fruit for next season's crop were smaller than on continuously irrigated trees during June but fruit growth caught up by September. During mechanical harvesting, previously drought-stressed trees lost fewer young fruit than continuously irrigated trees. Thus, winter drought stress effectively delayed flowering and avoided young fruit loss during late-season mechanical harvesting without negative impacts on yield or fruit quality of 'Valencia' orange trees.</div></front></TEI><affiliations><list><country><li>États-Unis</li></country><region><li>Floride</li></region></list><tree><country name="États-Unis"><region name="Floride"><name sortKey="Melgar, Juan Carlos" sort="Melgar, Juan Carlos" uniqKey="Melgar J" first="Juan Carlos" last="Melgar">Juan Carlos Melgar</name></region><name sortKey="Dunlop, Jill M" sort="Dunlop, Jill M" uniqKey="Dunlop J" first="Jill M." last="Dunlop">Jill M. Dunlop</name><name sortKey="Gene Albrigo, L" sort="Gene Albrigo, L" uniqKey="Gene Albrigo L" first="L." last="Gene Albrigo">L. Gene Albrigo</name><name sortKey="Syvertsen, James P" sort="Syvertsen, James P" uniqKey="Syvertsen J" first="James P." last="Syvertsen">James P. Syvertsen</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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