Two field experiments were conducted at the experimental farm of Faculty of Agricultural., MansouraUniv. during the successive winter seasons of 2009-2010 and 2010-2011 to investigate some of the available options to reduce the losses and increase the efficiency of N-fertilization for Spinach (Spinacia Oleracea) and Rocket (Eurco Visicaria L.) plants.
Thirty treatments were arranged in split-split block design, which were the simple possible combination between five treatments of mineral N, i.e ammonium nitrate (AN), AN+inhibitor (DCD), Urea (U), U+DCD and calcium nitrate (Ca-N) as a control treatment at the rate of 60 kgN/fad were arranged in the main plots. Treatments of N-fertilization were divided into 2, 3 or 4 doses and adapted as sub-plots. Two methods of N-applied were allocated as sub-sub plots, once as side dressing (SD) and the other as deep placement (DP).
The results of these investigation indicated that ; the highest safe yield of spinach and rocket plants and the most suitable treatment for realizing the highest use efficiency can be obtained due to applying N-fertilizer in the form of urea plus nitrification inhibitor (DCD) as deep placement in four doses.
The obtained data, also revealed that under any form of N-fertilization the contents of nitrate in the leaves of spinach and rocket plants in the absence of (DCD) were higher than that obtained in the presence of (DCD) as a nitrification inhibitor.The study highlighted that; the heighest NUE values were recorded for the plants fertilized with U+DCD and splitting N-fertilizer to four doses and applied using deep placement method for realizing the highest safe yield for spinach and rocket plants.
El-Agrody, M. W. M., Baddour, G. A., El-Ghamry, A. M., & Kany, M. A. (2011). MAXIMIZING USE EFFICIENCY OF MINERAL N-FERTILIZATION FOR SPINACH AND ROCKET PLANTS. Journal of Soil Sciences and Agricultural Engineering, 2(9), 963-975. doi: 10.21608/jssae.2011.56050
MLA
M. W. M. El-Agrody; G. A. Baddour; A. M. El-Ghamry; Marwa A. Kany. "MAXIMIZING USE EFFICIENCY OF MINERAL N-FERTILIZATION FOR SPINACH AND ROCKET PLANTS", Journal of Soil Sciences and Agricultural Engineering, 2, 9, 2011, 963-975. doi: 10.21608/jssae.2011.56050
HARVARD
El-Agrody, M. W. M., Baddour, G. A., El-Ghamry, A. M., Kany, M. A. (2011). 'MAXIMIZING USE EFFICIENCY OF MINERAL N-FERTILIZATION FOR SPINACH AND ROCKET PLANTS', Journal of Soil Sciences and Agricultural Engineering, 2(9), pp. 963-975. doi: 10.21608/jssae.2011.56050
VANCOUVER
El-Agrody, M. W. M., Baddour, G. A., El-Ghamry, A. M., Kany, M. A. MAXIMIZING USE EFFICIENCY OF MINERAL N-FERTILIZATION FOR SPINACH AND ROCKET PLANTS. Journal of Soil Sciences and Agricultural Engineering, 2011; 2(9): 963-975. doi: 10.21608/jssae.2011.56050
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