Dawa,, K., Abdel-Fattah, A., El-Gamiely, E., Seif El-Din, U. (2000). STUDIES ON BIO AND CHEMICAL FERTILIZATION ON SWEET POTATO (Ipomea batatas, L) 2-EFFECT OF SOME NITROGEN FERTILIZER SOURCES, RATES AND BIOFERTILIZER (NITROBIEN) ON CHEMICAL COMPOSITION OF TUBER ROOTS. Journal of Plant Production, 25(8), 5413-5423. doi: 10.21608/jpp.2000.259588
K. K. Dawa,; A. I. Abdel-Fattah; E. E. El-Gamiely; U. M. Seif El-Din. "STUDIES ON BIO AND CHEMICAL FERTILIZATION ON SWEET POTATO (Ipomea batatas, L) 2-EFFECT OF SOME NITROGEN FERTILIZER SOURCES, RATES AND BIOFERTILIZER (NITROBIEN) ON CHEMICAL COMPOSITION OF TUBER ROOTS". Journal of Plant Production, 25, 8, 2000, 5413-5423. doi: 10.21608/jpp.2000.259588
Dawa,, K., Abdel-Fattah, A., El-Gamiely, E., Seif El-Din, U. (2000). 'STUDIES ON BIO AND CHEMICAL FERTILIZATION ON SWEET POTATO (Ipomea batatas, L) 2-EFFECT OF SOME NITROGEN FERTILIZER SOURCES, RATES AND BIOFERTILIZER (NITROBIEN) ON CHEMICAL COMPOSITION OF TUBER ROOTS', Journal of Plant Production, 25(8), pp. 5413-5423. doi: 10.21608/jpp.2000.259588
Dawa,, K., Abdel-Fattah, A., El-Gamiely, E., Seif El-Din, U. STUDIES ON BIO AND CHEMICAL FERTILIZATION ON SWEET POTATO (Ipomea batatas, L) 2-EFFECT OF SOME NITROGEN FERTILIZER SOURCES, RATES AND BIOFERTILIZER (NITROBIEN) ON CHEMICAL COMPOSITION OF TUBER ROOTS. Journal of Plant Production, 2000; 25(8): 5413-5423. doi: 10.21608/jpp.2000.259588
STUDIES ON BIO AND CHEMICAL FERTILIZATION ON SWEET POTATO (Ipomea batatas, L) 2-EFFECT OF SOME NITROGEN FERTILIZER SOURCES, RATES AND BIOFERTILIZER (NITROBIEN) ON CHEMICAL COMPOSITION OF TUBER ROOTS
1Veget. and Flori. Dept., Fac. of Agric., Mansoura Univ.
2Veg. Res. Dept., Hort. Res Inst., Agric. Res. Center, Giza, Egypt.
Abstract
Two field experiments were performed at the Horticultural Research Farm of El-Bramoon (Dakahliya Governorate) during 1998 and 1999 seasons. This study aimed to study the effect of mineral nitrogen fertilizer levels, sources , biological fertilization and their interaction on chemical composition of sweet potato tuber roots.
The main results could be summarized as follows:
Application of Ca (NO3)2 fertilizer significantly increased reducing sugars contents, K, NO2- and NO3- contents in tuber roots as compared with (NH4)2 SO4 fertilizer. In addition, (NH4)2 SO4 fertilizer had significant increases on total carotene content in tuber roots.
Inoculation of plants with biofertilizer (nitrobien) led to increase reducing sugars and total carotene contents in tuber roots and beside that significantly reduced NO3-, and NO2- concentrations in tuber roots comparing with the uninoculated ones.
Raising nitrogen fertilizer levels from 0 to 80 kg N/fed resulted in a significant increase in total soluble and reducing sugars, total carotene as well as N, P, K, NO3- and NO2- concentrations in both seasons.
The positive interaction between N-sources and biofertilizer have been observed, application of Ca (NO3)2 fertilizer with biofertilizer gave the highest values of total soluble sugars NO3- and NO2- concentrations in tuber roots comparing with (NH4)2 SO4 with biofertilizer. Application of (NH4)2 SO4 fertilizer with biofertilizer significantly increased total carotene content.
The interaction between nitrogen fertilizer rates and biofertilizer had significant effect on reducing sugars, K, NO3- and NO2- concentration.
Thus, it can be recommended that adding (NH4)2 SO4 at 60 kg N/fed with biofertilizer (nitrobien) was the best treatment under the condition of this study for reducing mineral nitrogen fertilization, soil pollution and improving quality of tuber roots.
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