Abstract:

【Objective】 The objective of the research was to investigate the effect of nitrogen (N), phosphorus (P), potassium (K), and boron (B) on rapeseed yield, yield related traits, and profit of hybrid rapeseed (Brassica napus L.). 【Method】 Field experiments were conducted at 12 sites in Jiangxi provinces during 2008-2009. 【Result】 The combined application of NPKB increased the yield of rapeseed significantly. The average yield of NPKB treatment was 2 015 kg?hm-2. The average yield of CK treatment was 894 kg?hm-2, which was 1 121, 839, 758, 746, and 249 kg?hm-2 lower than those of NPKB, NPK , NKB, NPB, and PKB treatments, respectively. The average profit of NPKB treatment was up to 5 449.5 yuan/hm2 according to the prices of fertilizer and rapeseed during the production season. Compared with CK treatments,profit of NPKB, NPK, NKB, and NPB treatments increased by 2 231.1, 1 298.4, 1 280.7, and 1 541.1 yuan/hm2, respectively, while the profit of the treatment PKB decreased by 206.1 yuan/hm2. 【Conclusion】 It was concluded that the combination of NPKB fertilizers significantly increased both yield and profits of the hybrid rapeseed (Brassica napus L.). Utilization of nitrogen, phosphorus, potassium and boron fertilizers is the guarantee of realization of maximum hybrid rapeseed.

Key words: rapeseed, nitrogen, phosphorus, potassium, boron, yield, profit