关键词: 浙油50, 播期, 密度, 氮肥, 产量, 经济性状, 含油量

Abstract: The winter rapeseed cultivar Zheyou 50 was used as test material. The effects of sowingdate, density and nitrogen application amount on yield, economic characteristics and oil content were studied to explore highyield and highefficient cultivation techniques. Results showed that lower yield per hm2, oil content, pods per plant, yield per plant, primary effective branches and density of pods but higher kilograins weight was detected on the later sowingdate during September 20th to October 10th,. The yield per hm2, oil content and effective branch position was significantly lower, but the pods per plant, yield per plant and primary effective branches was significantly higher with the density of 75 000 plants per hm2 than 105 000 and 135 000 plants per hm2. Within the range of 150-450 kg·hm-2 of nitrogen, yield significantly increased with the increased input of nitrogen fertilizer. Increase in the numbers of the primary branch was correlated to increases of pods per plant and yield per plant, whereas decrease of the grains per pod was correlated to decreased oil content.

Key words: Zheyou 50, sowingdate, density, nitrogen, yield, economic traits, oil content