Impact of Using Oils of Rocket and Nigella Seeds as Partial Replacement of Dormex on Breaking Dormancy and Improving Yield of Superior Grapevines Under Minia Region Conditions

摘要

During 2015 and 2016 seasons, Superior grapevines were subjected once (10-11 Jan.) to dormex at 4 % alone, rocket oil at 5 %, nigella oil at 5 %, rocket + nigella oils at 5 % and/or dormex at 1 to 2 %. The merit was detecting the effect of these treatments on bud behavior, ABA, total phenols, total indoles and total soluble sugars of the buds, growth aspects, pigments and NPK in the leaves, berry setting %, yield, shot berries % and berries quality. Exposing the vines once (10 – 11 Jan.) to dormex at 4 % alone, rocket seed oil at 5 %, nigella seed oil at 5 % and rocket + nigella seed oil each at 5 % and / or dormex at 1 to 2 % materially was very effective in enhancing percentages of bud burst and fruiting buds, total indoles and total soluble sugars in the buds, growth aspects, pigments and NPK in the leaves, berry setting %, yield and berries quality and decreasing durations of bud burst and blooming, ABA and total phenols in the buds and shot berries % relative to the control. Combined applications of dormex at 1 to 2 % and both oils of rocket and nigella seed at 5 % had an announced effect on the aforementioned parameters compared to using each material alone. No major differences on the investigated characteristics were observed among the application of dormex at 4 % alone and the use of dormex at 2 % plus both rocket and nigella seed oils each at 5 %. It is advised to use dormex at 2% plus oils of rocket and nigella seeds each at 5 % (once on 10-11 Jan.) instead of using dormex at 4 % alone for breaking dormancy and improving yield and berries quality of Superior grapevines grown under Minia region conditions.