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פותח על ידי קלירמאש פתרונות בע"מ -
Foliar applied urea improves freezing protection to avocado and peach
Year:
1996
Source of publication :
Scientia Horticulturae
Authors :
דוד, ישראל
;
.
ויסמן, זאב
;
.
זילכה, שמואל
;
.
קליין, יצחק
;
.
Volume :
66
Co-Authors:
Zilkah, S., Inst. of Hort. and Ornamental Plants, Agricultural Research Organization, Volcani Center, P.O.B. 6, Bet Dagan 50250, Israel
Wiesmann, Z., Inst. of Hort. and Ornamental Plants, Agricultural Research Organization, Volcani Center, P.O.B. 6, Bet Dagan 50250, Israel
Klein, I., Inst. of Hort. and Ornamental Plants, Agricultural Research Organization, Volcani Center, P.O.B. 6, Bet Dagan 50250, Israel
David, I., Inst. of Hort. and Ornamental Plants, Agricultural Research Organization, Volcani Center, P.O.B. 6, Bet Dagan 50250, Israel
Facilitators :
From page:
85
To page:
92
(
Total pages:
8
)
Abstract:
The effect of foliar applied urea on freeze hardiness was evaluated under orchard and laboratory conditions. Freezing injury and senescence of avocado (Persea americana Mill.) cv. 'Hass' leaves in the orchard was inversely correlated to N content. Three foliar applications of 2% low- biuret urea caused a 26% nitrogen enrichment of leaves. Consequently, leaf freezing hardiness was increased and senescence retarded. Urea-treated leaves were 2.5 times more tolerant to freezing than untreated leaves, at the same level of senescence. The freeze protection effect of foliar-applied urea was confirmed using potted plants of the cultivar 'Fuerte' under controlled conditions. Potted avocado plants treated with 2% low-biuret urea, gradually cooled, and exposed to -2°C for 4 h, were significantly more hardy than control plants. Foliar application of 10% low-biuret urea to peach (Prunus persica L.) cv. 'Maravilha' shoots before flowering, 3 days before frost occurrence, increased the freezing hardiness and survival of the reproductive organs. The protective effect of foliar-applied urea on peach flower buds in spring decreased gradually as bud development progressed.
Note:
Related Files :
Avocado
Freezing injury
peach
Persea americana
Prunus
Prunus persica
Urea
עוד תגיות
תוכן קשור
More details
DOI :
10.1016/0304-4238(96)00883-7
Article number:
Affiliations:
Database:
סקופוס
Publication Type:
מאמר
;
.
Language:
אנגלית
Editors' remarks:
ID:
21646
Last updated date:
02/03/2022 17:27
Creation date:
16/04/2018 23:45
Scientific Publication
Foliar applied urea improves freezing protection to avocado and peach
66
Zilkah, S., Inst. of Hort. and Ornamental Plants, Agricultural Research Organization, Volcani Center, P.O.B. 6, Bet Dagan 50250, Israel
Wiesmann, Z., Inst. of Hort. and Ornamental Plants, Agricultural Research Organization, Volcani Center, P.O.B. 6, Bet Dagan 50250, Israel
Klein, I., Inst. of Hort. and Ornamental Plants, Agricultural Research Organization, Volcani Center, P.O.B. 6, Bet Dagan 50250, Israel
David, I., Inst. of Hort. and Ornamental Plants, Agricultural Research Organization, Volcani Center, P.O.B. 6, Bet Dagan 50250, Israel
Foliar applied urea improves freezing protection to avocado and peach
The effect of foliar applied urea on freeze hardiness was evaluated under orchard and laboratory conditions. Freezing injury and senescence of avocado (Persea americana Mill.) cv. 'Hass' leaves in the orchard was inversely correlated to N content. Three foliar applications of 2% low- biuret urea caused a 26% nitrogen enrichment of leaves. Consequently, leaf freezing hardiness was increased and senescence retarded. Urea-treated leaves were 2.5 times more tolerant to freezing than untreated leaves, at the same level of senescence. The freeze protection effect of foliar-applied urea was confirmed using potted plants of the cultivar 'Fuerte' under controlled conditions. Potted avocado plants treated with 2% low-biuret urea, gradually cooled, and exposed to -2°C for 4 h, were significantly more hardy than control plants. Foliar application of 10% low-biuret urea to peach (Prunus persica L.) cv. 'Maravilha' shoots before flowering, 3 days before frost occurrence, increased the freezing hardiness and survival of the reproductive organs. The protective effect of foliar-applied urea on peach flower buds in spring decreased gradually as bud development progressed.
Scientific Publication
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