Effect of foliar urea application on quality, growth, mineral uptake and yield of broccoli (Brassica oleracea L., var. italica)
2007
Yildirim, E.,Atatuerk Univ., Erzurum (Turkey). Ispir Hamza Polat Vocational Training School | Guvenc, I.,Atatuerk Univ., Erzurum (Turkey). Faculty of Agriculture | Turan, M.,Atatuerk Univ., Erzurum (Turkey). Faculty of Agriculture | Karatas, A.,Atatuerk Univ., Erzurum (Turkey). Ispir Hamza Polat Vocational Training School
The objective of this study was to determine the effect of foliar urea applications on quality, growth, mineral content and yield of broccoli under field conditions in 2003, 2004 and 2005. Broccoli cultivars AG 3317 and AG 3324 were treated with foliar urea applications at different concentrations (0.0, 0.4, 0.8 and 1.0%). Foliar applications of urea, especially 0.8 and 1.0% resulted in larger heads, weightier heads and plants as well as higher plants. Conversely, the greatest head and leaf dry matter contents were obtained with no fertilizer-nitrogen application. SPAD chlorophyll readings measured in the third year increased with elevated urea concentrations. Soil N fertilization and foliar urea applications increased the content of almost all nutrients in leaves and heads of both broccoli cultivars in all the three years. The highest values were generally obtained when 1.0% urea was applied. In conclusion, 0.61 and 0.96% urea concentrations should be used to obtain optimum yields in both broccoli cultivars tested.
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