A. Koochekzadeh; G. Fathi; M.H. Gharineh; S.A. Siadat; S. Jafari; Kh. Alami Saeid
Volume 36, Issue 3 , December 2013, , Pages 119-129
Abstract
The influence of different rates and split application (AP) of Nitrogen (N) on qualitative and quantitative characteristics of first sugarcane ratoon (Saccharum officinarum L.) cultivar ...
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The influence of different rates and split application (AP) of Nitrogen (N) on qualitative and quantitative characteristics of first sugarcane ratoon (Saccharum officinarum L.) cultivar CP48-103 were investigated. The study was conducted at the Sugarcane Research Center, 30 km South of Ahvaz during 2007 - 2008. The experiment was a split plot randomized complete block design with three replications, consisting of three different rates of N (N1, 92; N2, 138; N3, 184 kg N ha-1) as the main plots and three different split applications from urea fertilizer (AP1, 20-40-40%; AP2, 30-35-35%; AP3, 30-30-40%) in tillering, early stem extension and stem elongation stages as subplots. Results showed that both the rate and split application of N had no significant impact on sugarcane characteristics. However, the maximum stems and sugar yields were obtained by using 138 kg N ha-1 which was split to 20-40-40% (AP1) with values of 91.7 and 10.6 t ha-1, respectively. The highest nitrogen use efficiency was for the N1 treatments with 281.7 and 43.2 kg kg-1Nin stems and sugar yields, respectively. Results also indicated no significant effect of nitrogen application rates on sugarcane final yields; thus, the excessive application of N is not recommended in sugarcane farms.
