Abstract
Two factorial experiments (4 X 4) in split plot randomized complete block design were carried out during the two successive growing seasons of 2010/ 11 and 2011/12 to investigate effects of ascorbic acid (ASC) at rates of 0, 50, 100 or 200 ppm as foliar spray and active dry yeast at 14 g/ L (DY) application methods; i.e., foliar spray, soil drench or foliar spray + soil drench and their interactions on Lemongrass (Cymbopogon citratusSTAPF) growth, herb yield, essential oil % and essential oil yield and its components. Gradual and significant increases in plant height, tillers number/ plant, herb fresh and dry weights per plant (g) and per fed (ton), essential oil percentage in herb, and essential oil yield per plant (cc) and per fad (L) were recorded with increasing the tested ASC level from zero up to 100 ppm. Raise ASC level from 100 up to 200 ppm was without significant effects comparing to 100 ppm. Also, 100 ppm ASC resulted in the highest percentages of essential oil main components (Myrcene, limonine, linalool, citral b, citral a, citronellol and geraniol) comparing to unsprayed control plants or those sprayed with 50 or 200 ppm ASC. As for DY application methods, DY as foliar spray + soil drench or as soil drench only enhanced the above mentioned traits of growth and yield of herb and essential oil. There were no significant differences between the two application methods. The highest percentages of Myrcene, Citral b, Citral a and Geraniol were recorded in essential oil extracted from plants treated with DY as foliar spray + soil drench. While, applied DY as soil drench only increased percentages of limonine, linalool and citronellol in the essential oil. In general, foliar spray of DY had little effect comparing to the other tested DY application methods. Interaction treatments of 100 ppm ASC X DY as soil drench + foliar spray or 200 ppm ASC X DY as soil drench only resulted in significant increases in the above mentioned traits (plant growth, herb yield and essential oil determinations) without significant differences between the two interaction treatments. The highest percentages of limonine, linalool, citronellol and geraniol in essential oil were recorded with 100 ppm ASC X DY as soil drench interaction treatment. But, the interaction treatment of 100 ppm ASC X DY as soil drench + foliar spray resulted in the highest percentages of myrcene, citral b and citral a. In addition, the highest total carbohydrates percentages were recorded in herb of treated plants with these two treatments. Conclusion: It could be recommend that apply ascorbic as foliar spray at 100 ppm, or active dry yeast at 14 g/ L as soil drench each alone for enhance lemongrass growth as well as herb and essential oil yield. Also, ascorbic acid at 200 ppm interacted with active dry yeast at 14 g/ L as soil drench may be apply as an interaction treatment for promote lemongrass growth, herb yield and essential oil yield.
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Claims 16
Claim · model-written summary
Increasing foliar ascorbic acid to 100 ppm significantly increased lemongrass growth, herb yield and essential oil yield.
- Taxon
- Cymbopogon citratusSTAPF
Cymbopogon citratuse1 - Treatment
- ASC level from zero up to 100 ppme0
- Outcome
- plant height, tillers number/ plant, herb fresh and dry weightse0
- Direction
- increasese0
- Comparator
- zeroe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Gradual and significant increases in plant height, tillers number/ plant, herb fresh and dry weights per plant (g) and per fed (ton), essential oil percentage in herb, and essential oil yield per plant (cc) and per fad (L) were recorded with increasing the tested ASC level from zero up to 100 ppm”
e1“Lemongrass (Cymbopogon citratusSTAPF)”
Claim · model-written summary
Raising ascorbic acid from 100 to 200 ppm did not significantly change the measured lemongrass traits.
- Taxon
- Cymbopogon citratusSTAPFCymbopogon citratuse1
- Treatment
- ASC level from 100 up to 200 ppme0
- Outcome
- significant effectse0
- Direction
- without significant effectse0
- Comparator
- 100 ppme0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Raise ASC level from 100 up to 200 ppm was without significant effects comparing to 100 ppm”
e1“Lemongrass (Cymbopogon citratusSTAPF)”
Claim · model-written summary
Ascorbic acid at 100 ppm gave the highest percentages of seven named essential oil constituents.
- Taxon
- Cymbopogon citratusSTAPFCymbopogon citratuse1
- Treatment
- 100 ppm ASCe0
- Outcome
- percentages of essential oil main componentse0
- Direction
- higheste0
- Comparator
- unsprayed control plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“100 ppm ASC resulted in the highest percentages of essential oil main components (Myrcene, limonine, linalool, citral b, citral a, citronellol and geraniol) comparing to unsprayed control plants or those sprayed with 50 or 200 ppm ASC”
e1“Lemongrass (Cymbopogon citratusSTAPF)”
Claim · model-written summary
Dry yeast applied as foliar spray plus soil drench enhanced lemongrass growth and herb and oil yield.
- Taxon
- Cymbopogon citratusSTAPFCymbopogon citratuse1
- Treatment
- DY as foliar spray + soil drenche0
- Outcome
- growth and yield of herb and essential oile0
- Direction
- enhancede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“DY as foliar spray + soil drench or as soil drench only enhanced the above mentioned traits of growth and yield of herb and essential oil”
e1“Lemongrass (Cymbopogon citratusSTAPF)”
Claim · model-written summary
Dry yeast applied as soil drench enhanced lemongrass growth and herb and oil yield.
- Taxon
- Cymbopogon citratusSTAPFCymbopogon citratuse1
- Treatment
- as soil drench onlye0
- Outcome
- growth and yield of herb and essential oile0
- Direction
- enhancede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“DY as foliar spray + soil drench or as soil drench only enhanced the above mentioned traits of growth and yield of herb and essential oil”
e1“Lemongrass (Cymbopogon citratusSTAPF)”
Claim · model-written summary
Growth and yield did not differ significantly between combined spray and drench and drench only dry yeast methods.
- Taxon
- Cymbopogon citratusSTAPFCymbopogon citratuse1
- Treatment
- DY as foliar spray + soil drenche2
- Outcome
- differencese0
- Direction
- no significant differencese0
- Comparator
- as soil drench onlye2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“There were no significant differences between the two application methods”
e1“Lemongrass (Cymbopogon citratusSTAPF)”
e2“DY as foliar spray + soil drench or as soil drench only”
Claim · model-written summary
Combined dry yeast spray and drench gave the highest myrcene, citral b, citral a and geraniol percentages in lemongrass oil.
- Taxon
- Cymbopogon citratusSTAPFCymbopogon citratuse1
- Treatment
- DY as foliar spray + soil drenche0
- Outcome
- percentages of Myrcene, Citral b, Citral a and Geraniole0
- Direction
- higheste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The highest percentages of Myrcene, Citral b, Citral a and Geraniol were recorded in essential oil extracted from plants treated with DY as foliar spray + soil drench”
e1“Lemongrass (Cymbopogon citratusSTAPF)”
Claim · model-written summary
Dry yeast soil drench increased limonine, linalool and citronellol percentages in lemongrass oil.
- Taxon
- Cymbopogon citratusSTAPFCymbopogon citratuse1
- Treatment
- DY as soil drench onlye0
- Outcome
- percentages of limonine, linalool and citronellole0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“applied DY as soil drench only increased percentages of limonine, linalool and citronellol in the essential oil”
e1“Lemongrass (Cymbopogon citratusSTAPF)”
Claim · model-written summary
Dry yeast foliar spray alone had little effect relative to the other application methods.
- Taxon
- Cymbopogon citratusSTAPFCymbopogon citratuse1
- Treatment
- foliar spray of DYe0
- Outcome
- effecte0
- Direction
- little effecte0
- Comparator
- other tested DY application methodse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“foliar spray of DY had little effect comparing to the other tested DY application methods”
e1“Lemongrass (Cymbopogon citratusSTAPF)”
Claim · model-written summary
The 100 ppm ascorbic acid plus combined yeast spray and drench significantly increased lemongrass growth and yields.
- Taxon
- Cymbopogon citratusSTAPFCymbopogon citratuse1
- Treatment
- 100 ppm ASC X DY as soil drench + foliar spraye0
- Outcome
- plant growth, herb yield and essential oil determinationse0
- Direction
- increasese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“100 ppm ASC X DY as soil drench + foliar spray or 200 ppm ASC X DY as soil drench only resulted in significant increases in the above mentioned traits (plant growth, herb yield and essential oil determinations)”
e1“Lemongrass (Cymbopogon citratusSTAPF)”
Claim · model-written summary
The 200 ppm ascorbic acid plus yeast drench significantly increased lemongrass growth and yields.
- Taxon
- Cymbopogon citratusSTAPFCymbopogon citratuse1
- Treatment
- 200 ppm ASC X DY as soil drench onlye0
- Outcome
- plant growth, herb yield and essential oil determinationse0
- Direction
- increasese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“200 ppm ASC X DY as soil drench only resulted in significant increases in the above mentioned traits (plant growth, herb yield and essential oil determinations)”
e1“Lemongrass (Cymbopogon citratusSTAPF)”
Claim · model-written summary
The two combined ascorbic acid and yeast treatments did not differ significantly.
- Taxon
- Cymbopogon citratusSTAPFCymbopogon citratuse1
- Treatment
- 100 ppm ASC X DY as soil drench + foliar spraye2
- Outcome
- differencese0
- Direction
- without significant differencese0
- Comparator
- 200 ppm ASC X DY as soil drench onlye2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“without significant differences between the two interaction treatments”
e1“Lemongrass (Cymbopogon citratusSTAPF)”
e2“100 ppm ASC X DY as soil drench + foliar spray or 200 ppm ASC X DY as soil drench only”
Claim · model-written summary
Ascorbic acid at 100 ppm plus yeast drench gave the highest limonine, linalool, citronellol and geraniol percentages.
- Taxon
- Cymbopogon citratusSTAPFCymbopogon citratuse1
- Treatment
- 100 ppm ASC X DY as soil drenche0
- Outcome
- percentages of limonine, linalool, citronellol and geraniole0
- Direction
- higheste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The highest percentages of limonine, linalool, citronellol and geraniol in essential oil were recorded with 100 ppm ASC X DY as soil drench interaction treatment”
e1“Lemongrass (Cymbopogon citratusSTAPF)”
Claim · model-written summary
Ascorbic acid at 100 ppm plus combined yeast drench and spray gave the highest myrcene, citral b and citral a percentages.
- Taxon
- Cymbopogon citratusSTAPFCymbopogon citratuse1
- Treatment
- 100 ppm ASC X DY as soil drench + foliar spraye0
- Outcome
- percentages of myrcene, citral b and citral ae0
- Direction
- higheste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“100 ppm ASC X DY as soil drench + foliar spray resulted in the highest percentages of myrcene, citral b and citral a”
e1“Lemongrass (Cymbopogon citratusSTAPF)”
Claim · model-written summary
Both ascorbic acid and yeast interaction treatments gave the highest lemongrass herb carbohydrate percentages.
- Taxon
- Cymbopogon citratusSTAPFCymbopogon citratuse1
- Treatment
- 100 ppm ASC X DY as soil drench + foliar spraye2
- Outcome
- total carbohydrates percentagese0
- Direction
- higheste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the highest total carbohydrates percentages were recorded in herb of treated plants with these two treatments”
e1“Lemongrass (Cymbopogon citratusSTAPF)”
e2“100 ppm ASC X DY as soil drench + foliar spray or 200 ppm ASC X DY as soil drench only”
Claim · model-written summary
The authors recommend 100 ppm foliar ascorbic acid or 14 g/L yeast drench to improve lemongrass growth and yield.
- Taxon
- lemongrassCymbopogon citratuse0
- Outcome
- lemongrass growth as well as herb and essential oil yielde0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“apply ascorbic as foliar spray at 100 ppm, or active dry yeast at 14 g/ L as soil drench each alone for enhance lemongrass growth as well as herb and essential oil yield”
The same questions in other papers
application · molecular: metabolites · Cymbopogon citratus (lemon grass)Results agree
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- positive
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application · yield · Cymbopogon citratus (lemon grass)Results agree
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- positive
- positive
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1 paper more in this group
See all 5 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.