Effects of Dormex (Hydrogen Cyanamide) on the performance of three seedless table grape cultivars grown under greenhouse or open - field conditions
Laen...
Kuupäev
2018
Kättesaadav alates
Ajakirja pealkiri
Ajakirja ISSN
Köite pealkiri
Kirjastaja
Abstrakt
Greenhouse cultivation of table grapes is still limited to some experimental trials at
Lebanese coast. One major constraint facing this type of cultivation is the lack of enough chilling
hours causing irregular bud
-
break and yield reductions. Dormex, with
Hydrogen Cyanamide as
active ingredient, is an effective mean for dormancy release adopted in warm winter regions. The
work investigated separate and combined effects of two factors: greenhouse cultivation and
Dormex application on vine buds (following win
ter pruning) on three
-
year old seedless cultivars
(ARRA15, ARRA18, and ARRA19). Control consisted of non
-
treated plants grown in open
-
field.
Results showed that Dormex application under greenhouse induced budburst uniformity,
increased budburst percent (by
60%), number of flowers and fruits per shoot (by 83%) and vine
productivity (by 90%) in all cultivars compared to control. Bud formation was increased under
greenhouse and was reduced by Dormex treatment. Under greenhouse, elongation of current
season sho
ots was delayed and shoot length was reduced in treated plants, harvest was earlier by
7, 14, and 30 days in non
-
treated plants of ARRA18, ARRA19 and ARRA15 respectively and
full fruit set (100%) occurred for all plants. Dry weight of shoots was improved b
y Dormex
application in both cultivation systems. All ARRA cultivars responded similarly to experimental
factors except ARRA 19 under greenhouse where shoot length was enhanced in all plants while
bud formation only in treated plants. Finally, treating vin
e by Dormex under greenhouse was
found as efficient tool to improve bud break and advance harvest under the specific Lebanese
coastal conditions.
Kirjeldus
Article
Märksõnad
bud break, greenhouse, Hydrogen Cyanamide, seedless cultivars, articles