This research was carried out at the Agricultural Scientific Research Center in Hama, in seasons 2020, 2021 to study the effect of foliar spray of seaweed extract on the growth and productivity of the olive tree cv. Kaisi, Where the foliar spray was
applied with seaweed extract called alga 600 in concentrate of (0.5 g/l) According to treatments: A0 control without spraying seaweed extract, A1 one spray one week before flowering, A2 one spray after fruit set, A3 one spray one month before harvest, A4 two sprays (before flowering and after fruit set), A5 two sprays (after fruit set and one month before harvest) A6, three sprays (before flowering, after fruit set, and one month before harvest) with the addition of ground fertilization according to the Fertilizer recommendation. The results of foliar fertilization showed a significant effect on the vegetative growth traits, as The treatment one month before harvest was superior to the rest of the treatments with a primary shoots length average 6.94 cm, while the control was 4.75 cm, while seaweed extract had a positive effect on the total number of flowers. Where the spraying treatment before flowering and after the fruit set contract was superior to the rest of the treatments, as the average number of flowers was 203.11 compared to the control with an average number of flowers 164.19, as well as in the percentage of fruit set, as the highest percentage of the contract when spraying treatment before flowering was 3.20% and in control 2.19% The results also showed a clear superiority in the productivity of the tree, especially the treatment before flowering and after the contract, Where the average tree productivity was 37.07 kg, and in the control it was 14.07 kg It was observed that there was a significant increase in the percentage of oil for the fruits, as a treatment a month before harvest was significantly superior to the rest of the treatments in both seasons, as the highest value of the oil percentage reached 20.28%, followed by a treatment before flowering, after fruit set and one month before harvest, with an oil percentage of 20.27 compared to the control 17.17%.
The study was carried out in apple orchard and at the laboratories of Agricultural
Scientific Research Center, and Pome and Grapevine Division in Sweida (GCSAR),
Syria, during the growing seasons of 2015 and 2016 to study the effect of organic
res
idues, and boron and zinc addition on some soil characters, fruit set ratio and
some fruits qualitative traits in Starking delicious apple cultivar in Sweida.
The experiment was carried out during spring season 2016 to study the effect
of foliar spraying treatment with Tecamin Flower 2.5 ml/L in comparison with
distilled water, on growth of three hybrids of tomatoes at two different levels of
irrigation
(100 and 50 % of field capacity). Three sprays were conducted started
from flowering with two weeks’ interval. The results showed that ‘Finenss’ hybrid
had significant differences in plant height, branches per plant and leaves number per
plant. ‘Hadeer’ hybrid had superiority in dry matter ratio and content of chlorophyll
in leaves. Reducing the level of irrigation resulted in a significant decrease in
plant height, total branches number, versus an increase in the leaves number per
plant, total leaves area and the percentage of dry matter. The results showed that
the treatment with Tecamin flower led to a significant increase in all indicators
studied. The interaction treatments shoed that Hadeer hybrid irrigated in level 50
% and spraying of nutrient solution (Tecamin flower) had a significant increase in
dry matter ratio and chlorophyll content in leaves. While the hybrid Finenss which
irrigated in level 100 % with nutrient solution (Tecamin flower) had a significant
increase in leaves number per plant and total leaves area.
The experiment was conducted during the two seasons (2015 , 2016 ) on the Lemon trees
cv (Meyer ) aiming at studying the effect of the foliar spraying with the nutrients ( boron ,
zinc and iron ) on physical and chemical properties of the fruits Th
ese nutrients were
sprayed separately or as a mixture .
The average of each of the physical properties of the fruit (length , width , firmness,
volume and weight of the fruit ) , in addition to rind thickness and the fruits ` juice volume,
,the chemical properties of the fruit juice (total soluble solids, total sugars, total acidity,
vitamin C) were studied. An increase was observed in all the studied parameters in the
sprayed treatments compared to the control from( 6.37%- 3.33% -0.37% -
34.57mg%)to(9.33% -4.88% -1.89% -43.5%) in the first season and( 9.75% 5.87- 3.32% -
45%) in the second season, respectively. As a result of the statistical analysis, there were
significant differences between all the studied treatments and the control with overpass of
the treatment of the three elements (iron chelate + boron oxide + zinc chelate ) of all
treatments in the most of the studied figures in both seasons. Statistical analysis of the fruit
rind thickness showed the absence of the significant differences among the studied
treatments.
Yhis study was investigated at Agriculture Faculty of Damascus university
during the agricultural season of 2012/2013 in order to determine the effect of
foliar spray with seaweed extract (5 and 10 g/l) and GA3 (50 and 100 ppm) on
the growth and p
roduction of local red onion (Baladi) at different levels of
irrigation (100, 75, and 50% of field capacity). Onion bulblets were planted in
pots and plants were treated when they had 3-4 leaves and every two weeks
until full vegetative growth.
نفذ البحث خلال الموسمين ( 2009/2010 - 2010/2011) في قرية السرسكية التابعة لمحافظة اللاذقيةوالتي تنخفض بحدود 15 متر عن سطح البحر
This experiment was carried out during 2009 and 2010 seasons in fields
cultivated with 10 years of Dan and Nebaly cultivars of olive trees in province
of Damascus to study the effect of foliar spray of to one of nitrogen (N), boron
(B) and zinc (Z
) on the leaf area, shoot length, number of flowers, leaves
content of mineral elements, fertilization. These elements were sprayed
individually or combined together four times during the growing season as
follows: nitrogen (5 g/l), boric acid (2g /l), zinc sulfate (2g/ l), nitrogen + boric
acid, nitrogen + zinc sulfate, Boric acid + Zinc sulfate, and nitrogen + boric acid
+ zinc sulphate) at the same rates in single spray.
Sour orange (Citrus aurantium L.) seedlings were sprayed three times a
season with four levels of urea (45 % N) (2.5, 5.0, 7.5 and 10.0 g/L) and two
levels of ascorbic acid (150 and 300 g/L), each alone or in combinations.
Meanwhile the seedlings
of control treatment sprayed with distilled water
during 2010 growing season, twenty days intervals between each spray and
another. Results obtained at the middle of October of the same season,
indicated that the foliar spray with urea at the concentrations of 5.0, 7.5 and
10.0 g/L significantly increased leaves N and chlorophyll concentrations, leaves
number, seedling leaves area, seedlings height, main stem diameter and leaves
fresh and dry weight, especially at the foliar spray with 10.0 g/L. The means of
these parameters were 3.19%, 66.80 SPAD, 146.66 leaves/seedling, 3700.00
Cm², 83.66 Cm, 4.50 mm, 4.70 g, 1.53 g, respectively. Meanwhile ascorbic acid
spray at two concentrations unsignificantly affected all parameters, except
leaves chlorophyll content, leaves number and seedling leaves area. Most
treatments of combinations spray with urea and ascorbic acid significantly
affected all studied parameters, especially the treatment of foliar spray of urea
and ascorbic acid at a concentration of 10.0 g/L and 300 mg/ L, which gave the
highest means of leaves N concentration, leaves number, seedling leaves area
and leaves fresh and dry weights, and it unsignificantly differs from the
treatments which gave the highest means of seedlings height, main stem
diameter and percentage of leaves dry matter weight .
