Nemeat Alla, H., El-Geddawy, D., Makhlouf, B. (2015). EFFECT OF YEAST APPLICATION METHOD AND NUMBER ON YIELD AND QUALITY OF SUGAR BEET UNDER DIFFERENT LEVELS OF NITROGEN. Journal of Plant Production, 6(9), 1475-1490. doi: 10.21608/jpp.2015.51932
H. E. A. Nemeat Alla; Dalia I. H. El-Geddawy; B. S. I. Makhlouf. "EFFECT OF YEAST APPLICATION METHOD AND NUMBER ON YIELD AND QUALITY OF SUGAR BEET UNDER DIFFERENT LEVELS OF NITROGEN". Journal of Plant Production, 6, 9, 2015, 1475-1490. doi: 10.21608/jpp.2015.51932
Nemeat Alla, H., El-Geddawy, D., Makhlouf, B. (2015). 'EFFECT OF YEAST APPLICATION METHOD AND NUMBER ON YIELD AND QUALITY OF SUGAR BEET UNDER DIFFERENT LEVELS OF NITROGEN', Journal of Plant Production, 6(9), pp. 1475-1490. doi: 10.21608/jpp.2015.51932
Nemeat Alla, H., El-Geddawy, D., Makhlouf, B. EFFECT OF YEAST APPLICATION METHOD AND NUMBER ON YIELD AND QUALITY OF SUGAR BEET UNDER DIFFERENT LEVELS OF NITROGEN. Journal of Plant Production, 2015; 6(9): 1475-1490. doi: 10.21608/jpp.2015.51932
EFFECT OF YEAST APPLICATION METHOD AND NUMBER ON YIELD AND QUALITY OF SUGAR BEET UNDER DIFFERENT LEVELS OF NITROGEN
Sugar Crop Res. Inst., Agric. Res. Center, Giza, Egypt.
Abstract
Two field trials were carried out in the two successive seasons of 2012/2013 and 2013/2014 at EL-EttehadVillage, Kafr ELSheikh Governorate to study the grow yield and quality of sugar beet as affected by methods and numbers of yeast application in combination with nitrogen levels. The study included 24 treatments which were the combination between two application methods of yeast (soil 15 g/l and foliar 5 g/l), four application numbers (0, 1, 2 and 3) and three nitrogen fertilization levels (60, 80 and 100 kg/fed). A split–split plot design with three replications was used. Yeast application method were assigned the main plots whereas the nitrogen levels were allocated in the sub plots and number of yeast application were occupied the sub–sub plots.
The results obtained pointed out that root dimensions as well as root/top ratio positively and significantly responded to yeast application methods, yeast foliar application over passed soil application with respect to root dimensions and root/top ratio. Data showed that juice parameters of sugar beet roots in terms of sucrose and purity percentages significantly affected by application methods of yeast. The foliar application recorded the positive and significant superiority for both of sucrose and purity percentages. Application methods significantly effected on the values of extractable sugar % in both growing seasons, however the values of sugar loss to molasses % insignificantly affected by yeast application method. It could be noted that the highest values extractable sugar % was recorded with foliar application at the meantime the lowest values of sugar loss to molasses % was attained with yeast foliar application. Foliar application of yeast attained an increase in root, top and sugar yields amounted by 38.43 % & 12.14 %, 17.87 % & 17.54 % and 67.56 % & 27.52 % in the 1st and 2nd season, respectively, over those of soil application of yeast. It could be noted that the most effective of yeast foliar treatment was that on sugar yield.
The available results revealed that sugar beet plants appeared a continuous and significant increase in root dimensions due to the increase in the additional rates of nitrogen up to 100 kg N/fed. Also, increasing nitrogen application from 60 up to 100 kg N/fed let to positive response in the extractable sugar %, potassium %, α-amino nitrogen %, sucrose %, extractable sugar %, sugar loss to molasses % and root, top and sugar yields in both seasons, where as , the same rates significantly decreased purity %.
Increasing number of yeast application caused to significant increase values of root dimensions, root/top ratio, sodium %, potassium %, α-amino nitrogen %, sucrose %, extractable sugar %, sugar loss to molasses % and top and sugar yields in both seasons, meanwhile, decreased purity %.
The interaction between yeast application methods, application numbers of yeast and nitrogen levels significantly on top yield, sucrose% and sugar yield in the first season.
The different combinations between the studied factors showed that foliar application of yeast three times with 100 kg N/fed was the recommended combination to attain thehighest values of top and sugar yields as well as sucrose % under these conditions of the study.
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