Effect of Sulphur, Zinc and Boron Together with Nitrogen on Grain Yield and Nitrogen efficiency Indices in Canola Planting
2013
Mirzashahi, K | Paknejad , A. R | Karimpour, H | Sayfi, Hossain
This study was conducted to determine the effect of sulphur, zinc and boron together with nitrogen on the yield of canola (Brassica napus L.) and nitrogen efficiency indices in during 2010-2012 at Safi-abad Agricultural Research Center. The experiment was factorially arranged in a randomized complete block design with 24 treatments and three replications. The first factor consisted of three nitrogen levels ( 0, nitrogen amount on the basis of farm production potential, nitrogen 30% less than initial amount and the second factor consisted of eight levels ( without S, Zn and B, S application, Zn application, B application, S+Zn application, S+B application, Zn+B application and S+Zn+B application. The result showed that the main effect of nitrogen on grain yield, yield components, oil yield and nitrogen efficiency indices and residual nitrate were significant. The main effect of S, Zn and B on grain yield, number of pods per plant, nitrogen use and uptake efficiency and residual nitrate were significant. The highest grain yield (3.1 t ha-1), number of pods per plant (221), number of seeds per pod (26) and oil yield (1.2 t ha-1) obtained from application of 136 kg N ha-1. The highest grain yield (2.7 t ha-1), number of pods per plant (210) and oil yield (1.1 t ha-1) resulted due to application of S+Zn+B. Interaction effects of treatmeants meantime grain yield increase, only on number of pod per plant was significant. The highest grain yield (3.5 t ha-1) obtained as a result of application of S+Zn+B+N136. Increasing in the amount of nitrogen application and also application of S+Zn+B led to significant decrease and increase nitrogen efficiency indices, respectively. Key Words: Boron (B), Canola, Nitrogen, Sulphur (S), Zinc (Zn)
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