الفهرس 
Material and methodsOnly 14 pages are availabe for public view
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Abstract
ST TM l’A APY A. ND CONCL S ION
This investigation was carried out at the vineyard of
the Agricultural Secondary School at Moshtohor, Kalubia
Governorate, during two successive- seasons 1987/1988 and
1988/1.989 on two grape cultivars namely, Thompson seedless
and Romi Red. The vines were 20 years old. The vines were
trained according to the head system. The planting distance
was 2 x 2 meters.
The main purpose of this study was to investigate the
response of the two grape vine cultivars to foliar application
of zinc, iron, manganese chelated and boric acid. The
study included 103 vines represented the two Studied cultivars.
Thus, 54 vines from each cultivar were devoted to
receive the following treatments:
l. Tap water spray ”control”
2 . Foliar spray with Zn 0.5%.
3. Foliar spray with Zn ·0.5% 1(:,1 0.3%.
Foliar spray with Zn 0.5% Mn 0.3%.
5. Foliar spray with Zn o. + B 0.1% .
G. Foliar spray with Zn 0.5% + Fe 0.3% + Mn 0.3% .
7. Foliar spray wilh Zn 0.5% + Fe 0.3% + B 0.1%.
8. Foliar spr:ly with Zn o • •’.5,1- 0 + Mil 0.3% + B
9 . Foliar ipeay with Zn. 0.5% + Fe 0.3% + Mn 0.3% + B 0.1%.
Zinc, iron and manganese were added in the EDTA form of
these clic:talents, while B was added as boric acid.
The diCCerential investigated treatments were arranged
in a complete randomized design, each one was replicated
threF:e times and every re:plicate was represented by two
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vines.
Spray treatments were applied twice at full bloom
period and after fruit set one month later during both 1987/
1988 and 1988/1989 seasons.
Because of the trend of response to the different treatments
in each cultivar was nearly the same and paralleled
to the other , accordingly the data obtained for both cultivars
will be summarized as follows:
At VeQetative Qrowth
1.Bud burst percent:
Obtained results showed that foliar application either
with Zn 0.5% + Fe 0.3% or Zn 0.5% + Fe 0.3% + Mn 0.3% solutions
had no effect on the bud burst % as compared to control.
Whereas all other treatments significantly increased bud
burst percent over control in both studied cultivars during
the two. studied seasons.
2.Vegetative shoot percent
Obtained data showed that adding both Fe 0.3% ,Mn 0.3%,
or each alone to the Zn 0.5% solution had no effect on the
vegetative shoots percent. Whereas all other treatments
decreased the vegetative shoots percent as compared with that
of the control.
3. Fruitful shoots percent:
obtained results showed that adding both Fe 0.3% or Mn
0.3% either together or each solely to the Zn 0.5% solution
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had no effect on the fruitful shoot percent.Whereas all
other treatments increased the fruitful shoot percent as
comoared with that of the control. Foliar spray with Zn 0.5%
or with Zn 0.5%+ Fe 0.3%+ Mn 0.3%+ B 0.1% as well as Zn 0.5%
+B 0.1% solutions were the superior in this respect.
~ Shoot length:
The obtained data showed that all treatments significantly
increased shoot length over the control. Whereas,foliar
spray with Zn 0.5%+ Fe 0.3%+Mn 0.3%+B 0.1% was the superior
in this respect.
~ Number of leaves per shoots:
The obtained data showed that all treatments significantly
increased number of leaves per shoot over the control.
The treatments Zn 0.5% and Zn 0.5%+Fe 0.3% +Mn 0.3%+B 0.1%
were the superior in this respect.
~ Leaf area:
The obtained data showed that foliar spray with Zn 0.5%,
Zn 0.5%+Mn O.l%+B 0.1%, Zn 0.5%+Fe 0.3%+Mn 0.3%+B 0.1%, Zn
0.5%+Mn 0.3% and Zn 0.5%+Fe 0.3% +Mn 0.3% solutions significantly
increased leaf area over control. Foliar spray with
Zn 0.5%+ fe 0.3% + Mn 0.3% + B 0.1% and with Zn 0.5% were
the superior in this respect.
~ Weight of one-year-old removed wood:
The obtained data showed that all spraying treatments
significantly increased the weight of one-year-old removed
wood. The highest value was obtained from the foliar spray
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with Zn 0.5%+ Fe 0.3% +B 0.1%.
B. leaf mineral content:
~ Nitrogen content:
The obtained data showed that leaf nitrogen content
was not consistently affected by the different treatments,
however the leaf nitrogen content was decreased as the growing
season advanced in both cultivars,regardless of the
treatments applied.
~ Phosphorous content:
The obtained data showed that the foliar spray with
any of the different combinations of the four studied micrnutrients
did not affect the leaf phosphorous content for
both grape cultivars.
~ Potassium content:
The obtained data showed that leaf potassium content
was not statistically affected by all treatments.
4. Zinc; content:
The obtained data showed that leaf zinc content in both
grape vines cultivars was increased obviously by all treatments
which containing zinc over than that of the control.
Foliar spray with Zn 0.5% was the superior in this respect.
The residual effect was not clearly noticeable in the following
season .
.2...... Iron content:
The obtained data showed that leaf iron content was
increased obviously by all treatments which containing iron
over than that of the control. Foliar spray with Zn 0.5% +
Fe 0.3% was the superior in this respect. The residual ef-
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feet was not noticeable in the following season.
~ Manganese content:
The obtained data showed that leaf manganese content
was increased obviously by all treatments containing Mn
over than that of the control. Foliar spray with Zn 0.5% +
Mn 0.3% was the superior in this respect. In addition, foliar
spray with Zn 0.5%+Fe 0.3% and Zn 0.5%+B 0.1% significantly
increased leaf Mn content over than that of the control.
The residual effect was not noticeable in the following year.
~ Boron content:
The obtained data showed that leaf boron content was
increased obviously by all micro-nutrient element solutions
containing boron over all other treatments . There was no
carryover effect on the following season.
~ Yield:
Generally, the obtained data showed that all treatments
significantly increased yield over the control. Foliar spray
with Zn 0.5%,Zn 0.5%+B 0.1% and Zn 0.5%+Fe 0.3% +Mn 0.3% +
B 0.1% were the superior in this respect.
~ FRuit gyality:
~ Average weight of cluster:
The obtained data disclosed that all treatments significantly
increased the weight of cluster over than that of
the control. Furthermore, foliar spray with Zn 0.5%+Fe 0.3%
+ Mn 0.3% + B 0.1% was the superior in this respect.
~ Average weight of 100 berries:
The obtained data showed that berries of the control
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vines were statistically of the lightest weight .The highest
value was obtained from Zn 0.5% + Fe 0.3% + Mn 0.3% + B 0.1%
followed by Zn 0.5% + Mn 0.3% + B 0.1% and Zn 0.5% + B 0.1%
treatments.
3,Juice volume of 100 berries:
The obtained data showed that Zn 0.5% or Zn 0.5% + Fe
0.3% + Mn 0.3% + B 0.1% treatments significantly increased
juice volume of 100 berries over that of the control. On the
contrary, the other treatments significantly decreased juice
volume of 100 berries.
4,Weight of cluster stem:
The obtained data showed that all treatments investigated
increased slightly the weight of cluster stem, but the
differences were so small to reach level of significance.
5.Total soluble solids percent:
The data obtained showed that Zn 0.5% or Zn 0.5% + Fe
0.3% + Mn 0.3% + B 0.1% treatments induced berries contained
the highest value of T.S.S.%. The increase in T.S.S% was
highly significant as compared with those of the control or
the other treatments.
6,Fruit juice acidity:
The obtained data showed that foliar spray either with
Zn 0.5% or Zn 0.5% + Fe 0.3% +Mn 0.3% + B 0.1% significantly
decreased acidity than that of the control.
7, Total soluble solids! Acid ratio:
The obtained data showed that foliar spray either with
Zn 0.5% or Zn 0.5% + Fe 0.3% + B 0.1% treatment produced
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berries showed the highest T.S.S./Acid ratio. Such increase
was significant as compared with control or the other treaments.