Authors
1
Assistant Professor, Agricultural and Natural Resources Research and Education Center of Safiabad, Agricultural Research, Education, and Extension Organization (AERRO), Dezful. Iran
2
Assistant Professor, Soil and Water Research Institute, Agricultural Research, Education and Extension Organization (AERRO), Karaj, Iran
Abstract
This study was conducted to determine the effect of phosphorus fertilization on the grain yield and phosphorus efficiency in different canola cultivars during 2010-2012, at Research Center and Agricultural and Education and Natural Resources Research and Education Center of Ssafiabad, Dezful, Iran. The experiment was arranged as factorial in a randomized complete block design with three replications. The first factor consisted of five phosphorus (Pp) levels (0, 16, 32, 49, and 61 kg.ha-1) and the second factor consisted of three cultivars (Hyola 401, RGS 300, and Sarigol). The result showed that the main effect of phosphorus and cultivars on yields of grain, straw, oil, and phosphorus uptake were significant. The highest of grain and oil yields (2856 and 1128 kg.ha-1, respectively) was were obtained from application of 16 kg P per ha-1 (2856 and 1128 kg -1,respectively). Also, Hyola 401 cultivar had the highest grain and oil yields (2891 and 1137 kg. ha-1, respectively).Phosphorus application led to significant decrease in the phosphorus efficiency indices. Significant differences among the cultivars in terms of performance measurement indicators was were not observed, except indicator of response to fertilizer, so thatwhile the Hyola 401 had the highest response to fertilizer compared to the other cultivars. According to the results of this study, and with regardingconsidering economical analysis, application of 16 kg Pp per ha-1 and Hyola 401 cultivar is recommended.
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