EFFECT OF N-FORMS AND K-LEVELS ON THE PRODUCTIVITY OF LONG WHITE RADISH
Tartoura, E., Hamail, A., El-Gamiely, E., El-Deweny, K. (2011). EFFECT OF N-FORMS AND K-LEVELS ON THE PRODUCTIVITY OF LONG WHITE RADISH. EKB Journal Management System, 2(11), 1421-1438. doi: 10.21608/jpp.2011.85667
E. A. A. Tartoura; A. F. A. Hamail; E. I. El-Gamiely; K. M.A. R. El-Deweny. "EFFECT OF N-FORMS AND K-LEVELS ON THE PRODUCTIVITY OF LONG WHITE RADISH". EKB Journal Management System, 2, 11, 2011, 1421-1438. doi: 10.21608/jpp.2011.85667
Tartoura, E., Hamail, A., El-Gamiely, E., El-Deweny, K. (2011). 'EFFECT OF N-FORMS AND K-LEVELS ON THE PRODUCTIVITY OF LONG WHITE RADISH', EKB Journal Management System, 2(11), pp. 1421-1438. doi: 10.21608/jpp.2011.85667
Tartoura, E., Hamail, A., El-Gamiely, E., El-Deweny, K. EFFECT OF N-FORMS AND K-LEVELS ON THE PRODUCTIVITY OF LONG WHITE RADISH. EKB Journal Management System, 2011; 2(11): 1421-1438. doi: 10.21608/jpp.2011.85667

EFFECT OF N-FORMS AND K-LEVELS ON THE PRODUCTIVITY OF LONG WHITE RADISH

Journal of Plant Production
Article 2, Volume 2, Issue 11, November 2011, Page 1421-1438  XML PDF (572.06 K)
Document Type: Original Article
DOI: 10.21608/jpp.2011.85667
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Authors
E. A. A. Tartoura1; A. F. A. Hamail2; E. I. El-Gamiely1; K. M.A. R. El-Deweny1
1Vegetables and Ornamentals Dept., Fac. Agric., Mans. Univ., Egypt.
2Vegetables and Ornamentals Dept., Damietta Fac. Agric., Mans. Univ.
Abstract
Two field experiments were carried out during both successive winter seasons of 2008/2009 and 2009/2010 in a private farm near Gamasa city, Dakahlia Governorate to evaluate the effect of Nitrogen fertilization forms (NH4 : NO3) and Potassium fertilization levels on plant growth, chemical composition, yield and quality of radish plants (Raphanus sativus, L., cv. Radish early 40 days). 
Factorial experiment in a randomized complete block design was used. The experiment included 15 treatments: First factor: 5 treatments of N-forms (NH4 : NO3), i., N1=100% NH4, N2=75% NH4+25% NO3, N3=50% NH4 + 50% NO3, N4=25% NH4+75% NO3 and N5=100% NO3. Second factor 3 treatments of K-levels: K1 = 40, K2 = 70 and K3 = 100 Kg K2O/fed.
The results obtained from this work could be summarized as follow:

The maximum values of vegetative growth parameters, total chlorophyll, N%, K%, yield and its components and quality parameters were recorded for the plants supplied with N-forms as N3 treatment (50%NH4 + 50%NO3) and N4 treatment (25% NH4 + 75% NO3). Whereas, the lowest one were produced when 100% NH4 was the only N-form. This trend was true in the two seasons.
The highest values of these parameters were realized for the treatments of K2 (70 kg K2O/fed) or K3 (100 kg K2O/fed).
With regard to the effect of interaction between N-forms and K-levels, it can be observed that the best vegetative growth parameters, chemical constituents, yield and quality parameters were documented for the plants received the N forms as N3 (50%NH4 + 50%NO3) followed by N4 (25% NH4 + 75% NO3) of N-fertilizers at the rate of 100 kg N/fed combination with K2 level (70kg K2O/fed). Whereas, the lowest one were produced when 100% NH4 was the only N-form with all levels of potassium during the both seasons under the conditions of new sand cultivated area of Dakahlia Governorate, Egypt.
Keywords
Radish; Raphanus sativus; N-forms; N-sources; N-fertilizers; K-levels; vegetative growth; yield; quality parameters; chemical composition; total sugars; free NO3
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