Abstract
Yield and fruit quality of Navel orange trees in response to spraying yeast extract at (0.2 and 4.0%) or zinc sulphate at (0.5 and 1.0%) either singly or in combinations were evaluated during two successive seasons, 2008 and 2009 at EL Qalubia Governorate, Egypt. Tested trees were sprayed two times yearly at the beginning of March and after fruit set. Results showed that single or combined application of either yield or zinc were very effective in stimulating yield as well as physical and chemical characters of fruits rather than control. Spraying trees with 4.0% yeast extract combined with 1.0% zinc sulphate was more effective in improving total yield and fruit numbers beside increasing fruit weight, length and volume. Also, recorded the highest values of fruit quality resembled by increasing total soluble solids, ascorbic acid and decreasing fruit acidity. The best results with regard to yield and fruit quality were significantly obtained due to spraying Navel orange trees with combination of (0.4% yeast + 1.0 % zinc) followed in descending order by (0.4% yeast + 0.5% zinc) and (0.2% yeast + 1.0% zinc). 6 cytokinin as natural plant hormone. In addition, ZnSO at 1.0%. application of active dry yeast was very effective in Yeast at 0.2%. releasing carbon dioxide and stimulating photosynthesis Yeast at 0.4%. (1). Hegab (2) reported that spraying micronutrients Combinations of ZnSO at 0.5% + yeast at 0.2%. slightly reduced juice acidity of Navel orange trees. In Combinations of ZnSO at 1.0% + yeast at 0.2%. addition, Sayed (3) and Badawy (4) found that Combinations of ZnSO at 0.5% + yeast at 0.4%. micronutrient treatments gave a little effect on fruit quality Combinations of ZnSO at 1.0% + yeast at 0.4%. of Balady mandarin trees. The present study aimed mainly to evaluate the All treatments were sprayed two times yearly at the effect of sprays active dry yeast and zinc sulphate as beginning of March and after fruit set. Trees were foliar either alone or in combinations on yield and fruit separated from each side with plastic sheets to avoid quality (physical and chemical properties) of Navel orange any contamination between them, all treatments received trees.
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Claims 7
Claim · model-written summary
Single or combined sprays of yeast extract or zinc sulphate were very effective in stimulating Navel orange yield compared with the control.
- Taxon
- Navel orange trees
Citrus sinensist0 - Treatment
- spraying yeast extract at (0.2 and 4.0%) or zinc sulphate at (0.5 and 1.0%) either singly or in combinationse1
- Outcome
- yielde0
- Direction
- stimulatinge0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“single or combined application of either yield or zinc were very effective in stimulating yield as well as physical and chemical characters of fruits rather than control”
e1“spraying yeast extract at (0.2 and 4.0%) or zinc sulphate at (0.5 and 1.0%) either singly or in combinations”
t0“Navel orange trees”
Claim · model-written summary
Single or combined sprays of yeast extract or zinc sulphate were very effective in stimulating physical and chemical characters of Navel orange fruits compared with the control.
- Taxon
- Navel orange treesCitrus sinensist0
- Treatment
- spraying yeast extract at (0.2 and 4.0%) or zinc sulphate at (0.5 and 1.0%) either singly or in combinationse1
- Outcome
- physical and chemical characters of fruitse0
- Direction
- stimulatinge0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“single or combined application of either yield or zinc were very effective in stimulating yield as well as physical and chemical characters of fruits rather than control”
e1“spraying yeast extract at (0.2 and 4.0%) or zinc sulphate at (0.5 and 1.0%) either singly or in combinations”
t0“Navel orange trees”
Claim · model-written summary
Spraying 4.0% yeast extract combined with 1.0% zinc sulphate was more effective in improving total yield and fruit numbers.
- Taxon
- Navel orange treesCitrus sinensist0
- Treatment
- Spraying trees with 4.0% yeast extract combined with 1.0% zinc sulphatee0
- Outcome
- total yield and fruit numberse0
- Direction
- improvinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Spraying trees with 4.0% yeast extract combined with 1.0% zinc sulphate was more effective in improving total yield and fruit numbers”
t0“Navel orange trees”
Claim · model-written summary
Spraying 4.0% yeast extract combined with 1.0% zinc sulphate increased fruit weight, length and volume.
- Taxon
- Navel orange treesCitrus sinensist0
- Treatment
- Spraying trees with 4.0% yeast extract combined with 1.0% zinc sulphatee0
- Outcome
- fruit weight, length and volumee0
- Direction
- increasinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Spraying trees with 4.0% yeast extract combined with 1.0% zinc sulphate was more effective in improving total yield and fruit numbers beside increasing fruit weight, length and volume”
t0“Navel orange trees”
Claim · model-written summary
The 4.0% yeast extract plus 1.0% zinc sulphate spray gave the highest fruit quality values, increasing total soluble solids and ascorbic acid.
- Taxon
- Navel orange treesCitrus sinensist0
- Treatment
- Spraying trees with 4.0% yeast extract combined with 1.0% zinc sulphatee1
- Outcome
- total soluble solids, ascorbic acide0
- Direction
- increasinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“increasing total soluble solids, ascorbic acid”
e1“Spraying trees with 4.0% yeast extract combined with 1.0% zinc sulphate”
t0“Navel orange trees”
Claim · model-written summary
The 4.0% yeast extract plus 1.0% zinc sulphate spray decreased fruit acidity.
- Taxon
- Navel orange treesCitrus sinensist0
- Treatment
- Spraying trees with 4.0% yeast extract combined with 1.0% zinc sulphatee1
- Outcome
- fruit aciditye0
- Direction
- decreasinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“decreasing fruit acidity”
e1“Spraying trees with 4.0% yeast extract combined with 1.0% zinc sulphate”
t0“Navel orange trees”
Claim · model-written summary
The best yield and fruit quality were significantly obtained with 0.4% yeast + 1.0% zinc, followed by 0.4% yeast + 0.5% zinc and 0.2% yeast + 1.0% zinc.
- Taxon
- Navel orange treesCitrus sinensise0
- Treatment
- combination of (0.4% yeast + 1.0 % zinc)e0
- Outcome
- yield and fruit qualitye0
- Direction
- beste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The best results with regard to yield and fruit quality were significantly obtained due to spraying Navel orange trees with combination of (0.4% yeast + 1.0 % zinc)”
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