Harbi, M. (2014). INFLUENCE OF ASCORBIC ACID AND ACTIVE DRY YEAST ON Cymbopogon citratus PLANT. Journal of Productivity and Development, 19(3), 333-362. doi: 10.21608/jpd.2014.42666
Mariam Ali Harbi. "INFLUENCE OF ASCORBIC ACID AND ACTIVE DRY YEAST ON Cymbopogon citratus PLANT". Journal of Productivity and Development, 19, 3, 2014, 333-362. doi: 10.21608/jpd.2014.42666
Harbi, M. (2014). 'INFLUENCE OF ASCORBIC ACID AND ACTIVE DRY YEAST ON Cymbopogon citratus PLANT', Journal of Productivity and Development, 19(3), pp. 333-362. doi: 10.21608/jpd.2014.42666
Harbi, M. INFLUENCE OF ASCORBIC ACID AND ACTIVE DRY YEAST ON Cymbopogon citratus PLANT. Journal of Productivity and Development, 2014; 19(3): 333-362. doi: 10.21608/jpd.2014.42666
INFLUENCE OF ASCORBIC ACID AND ACTIVE DRY YEAST ON Cymbopogon citratus PLANT
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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