Evaluation of Different Levels of Nitrogen and Zinc Fertilizer on Morphological Characters and Yield of Rapeseed

Abstract

Abstract: The experiment was undertaken during rabi season, November 2011 to February 2012 to examine the effects of different levels of nitrogen and zinc fertilizer on morphology and yield of rapeseed Brassica campestris L. variety BARI sarisha 15. In this experiment, the treatment consisted of four different N levels viz. (N0: 0, N1: 60, N2:120, and N3:180 Kg N/ha) and three different levels of Zn viz. (Zn0:0, Zn1:1 and, Zn2:2 Kg/ha) using randomized complete block (RCBD) with three replications. Nitrogen showed significant variations on both morphological characters, yield contributing parameters and yield of rapeseed such as plant height, number of leaves, number of primary branches, length of inflorescence, seed yield and harvest index. Zinc did not show significant difference on morphological characters as nitrogen. But the significant differences were found on yield contributing characters and yield of rapeseed with zinc fertilization. The interaction between nitrogen and zinc showed statistical variations on all characters including morphological and yield contributing parameters and yield of rapeseed. The treatment combination, N2Zn2 (120 Kg N/ha along with 2 Kg Zn/ha) produced the highest seed yield (4.22 t/ha) whereas the lowest seed yield (0.37 t/ha) recorded from N0Zn0 treatment combination with nitrogen and zinc fertigation. Therefore, the experimental results suggested that both nitrogen and zinc have contribution to improve seed yield of rapeseed by altering reproductive characters