Abstract
This investigation was conducted in (2012 and 2013) seasons on 14 years old Valencia and Washington navel orange trees(Citrus sinensis L.) on sour orange (Citrus aurantium L.) rootstocks and spaced at 5 × 5 m in a private orchard. Its aim to study the effect of foliar spraying with seaweed extract at 200, 250 and 300 cm /100 liter in 2 stages (before flowering and after initial fruit set). Foliar spraying with seaweeds extract on Valencia and Washington navel orange trees were significantly increased almost studied characters. The tested data of fruit set, yield, fruit quality and leaf chemical composition were max - in Washington navel orange trees compared to Valencia orange trees, where seaweeds extract gave maximized in Washington navel orange trees than in Valencia orange trees. Trees sprayed with it gained that the longest shoot length as compared with untreated control trees. The largest leaf surface area/ area was recorded for trees that sprayed with seaweeds extract in both study seasons. Spraying seaweeds extract (300 / 100 liter which added before flowering) significantly affected initial fruit set % in both study seasons. Treat. (7) sprayed trees gained the highest initial fruit set percentage, followed by Treat. (4) compared with control trees. Trees sprayed with seaweeds extract (300 cm / 100 liter) after initial fruit set led to reduce June drop % in both seasons than untreated ones. Tree yield (fruits number and kg/ tree) were significantly increased as compared to the control treatment. Data revealed that fruit weight, fruit L/D ratio, T.S.S, T.S.S /acid ratio and vitamin C were significantly increased by foliar spraying with seaweeds extract associated with increasing concentration, where the highest values were obtained from (Treat. 7) followed by (Treat. 4) in both seasons compared to control. In contract, total acidity was reduced with all treatments compared to control in both seasons. In addition, Treat. (7) gave significant increment of leaf (mineral content) as N, P, K, Ca, Mg, Fe, Zn, and Mn followed by Treat. (4) in both seasons compared to control. Also, data indicated that leaf content of chlorophyll (a & b) and carotenoids were increased when applied 300 cm seaweeds extract/ 100 liter after initial fruit set fallowed by the same concentration before flowering in both seasons compared to the control trees. Generally, it could be concluded that applying seaweeds extract to Valencia and Washington navel orange trees at 200, 250 and 300 cm /100 liter in 2 stages/ season (before flowering and after initial fruit set) enhanced shoot length and leaf surface area and increased initial fruit set %, increased yield/ tree, improved fruit quality, increased leaf mineral content and decreased June drop comparing with control treatment. While 300 cm seaweeds extract/ 100 liter after initial fruit set gave the best net profit.
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Claims 15
Claim · model-written summary
Washington navel orange had higher fruit set, yield, fruit quality and leaf composition than Valencia.
Verbatim
e0“The tested data of fruit set, yield, fruit quality and leaf chemical composition were max - in Washington navel orange trees compared to Valencia orange trees”
Claim · model-written summary
Seaweed spraying increased shoot length relative to untreated trees.
Verbatim
e0“Trees sprayed with it gained that the longest shoot length as compared with untreated control trees.”
t0“ORANGE TREES”
Claim · model-written summary
Seaweed spraying produced the largest leaf area.
Not reportedComparator
Verbatim
e0“The largest leaf surface area/ area was recorded for trees that sprayed with seaweeds extract in both study seasons.”
t0“ORANGE TREES”
Claim · model-written summary
The before-flowering 300 dose significantly affected initial fruit set.
- Taxon
- orange treest0
- Treatment
- seaweeds extract (300 / 100 liter which added before flowering)e0
- Outcome
- initial fruit set %e0
Not reportedComparatorDirection
Verbatim
e0“Spraying seaweeds extract (300 / 100 liter which added before flowering) significantly affected initial fruit set % in both study seasons.”
t0“ORANGE TREES”
Claim · model-written summary
Treatment 7 gave the highest initial fruit set, followed by treatment 4.
Verbatim
e0“Treat. (7) sprayed trees gained the highest initial fruit set percentage, followed by Treat. (4) compared with control trees.”
t0“ORANGE TREES”
Claim · model-written summary
Seaweed sprayed after fruit set reduced June drop.
Verbatim
e0“Trees sprayed with seaweeds extract (300 cm / 100 liter) after initial fruit set led to reduce June drop % in both seasons than untreated ones.”
t0“ORANGE TREES”
Claim · model-written summary
Seaweed spraying significantly increased fruit number and yield mass.
Verbatim
e0“Tree yield (fruits number and kg/ tree) were significantly increased as compared to the control treatment.”
t0“SEAWEEDS CONCENTRATE ON FRUIT SET, YIELD, FRUIT QUALITY AND LEAF CHEMICAL COMPOSITION OF VALENCIA AND WASHINGTON NAVEL ORANGE TREES”
Claim · model-written summary
Seaweed spraying significantly increased fruit weight, length diameter ratio and soluble solids with concentration.
- Taxon
- orange treest0
- Treatment
- foliar spraying with seaweeds extracte0
- Outcome
- fruit weight, fruit L/D ratio, T.S.Se0
- Direction
- increasede0
Not reportedComparator
Verbatim
e0“fruit weight, fruit L/D ratio, T.S.S, T.S.S /acid ratio and vitamin C were significantly increased by foliar spraying with seaweeds extract associated with increasing concentration”
t0“ORANGE TREES”
Claim · model-written summary
Seaweed spraying significantly increased solids acid ratio and vitamin C with concentration.
- Taxon
- orange treest0
- Treatment
- foliar spraying with seaweeds extracte0
- Outcome
- T.S.S /acid ratio and vitamin Ce0
- Direction
- increasede0
Not reportedComparator
Verbatim
e0“fruit weight, fruit L/D ratio, T.S.S, T.S.S /acid ratio and vitamin C were significantly increased by foliar spraying with seaweeds extract associated with increasing concentration”
t0“ORANGE TREES”
Claim · model-written summary
All seaweed treatments reduced total acidity relative to control.
Verbatim
e0“total acidity was reduced with all treatments compared to control in both seasons.”
t0“ORANGE TREES”
Claim · model-written summary
Treatment 7 significantly increased leaf N, P and K mineral content.
Verbatim
e0“Treat. (7) gave significant increment of leaf (mineral content) as N, P, K, Ca, Mg, Fe, Zn, and Mn followed by Treat. (4) in both seasons compared to control.”
t0“ORANGE TREES”
Claim · model-written summary
Treatment 7 significantly increased leaf Ca, Mg and Fe mineral content.
Verbatim
e0“Treat. (7) gave significant increment of leaf (mineral content) as N, P, K, Ca, Mg, Fe, Zn, and Mn followed by Treat. (4) in both seasons compared to control.”
t0“ORANGE TREES”
Claim · model-written summary
Treatment 7 significantly increased leaf Zn and Mn mineral content.
Verbatim
e0“Treat. (7) gave significant increment of leaf (mineral content) as N, P, K, Ca, Mg, Fe, Zn, and Mn followed by Treat. (4) in both seasons compared to control.”
t0“ORANGE TREES”
Claim · model-written summary
Post-fruit-set seaweed spraying increased chlorophyll a and b and carotenoids.
Verbatim
e0“leaf content of chlorophyll (a & b) and carotenoids were increased when applied 300 cm seaweeds extract/ 100 liter after initial fruit set fallowed by the same concentration before flowering in both seasons compared to the control trees.”
t0“ORANGE TREES”
Claim · model-written summary
Post-fruit-set 300 cm seaweed extract produced the best net profit.
- Taxon
- orange treest0
- Treatment
- 300 cm seaweeds extract/ 100 liter after initial fruit sete0
- Outcome
- net profite0
- Direction
- beste0
Not reportedComparator
Verbatim
e0“300 cm seaweeds extract/ 100 liter after initial fruit set gave the best net profit.”
t0“ORANGE TREES”
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