Abstract: Six different polysulphte fertilizer treatments（0,375,750,1 125,1 500,1 875 kg/hm²） were set up to study the effects of different polysulphte fertilizers on the yield and economic benefits of rape（Brassica napus L.）. The results showed that compared with the control（NPB）, the application of polysulphte fertilizer for two consecutive years（2016—2018） increased the yield by 20.1%~42.3% and 27.0%~58.7%, respectively. The highest yield were achieved at 1 182 and 1 167 kg/hm², respectively, with maximum yield of 3 234 and 2 438 kg/hm², respectively. Compared with the control（NPB）, the economic benefit of rape was the highest when the dosage of polysulphte fertilizer was 375 kg/hm² for two consecutive years, which were 852 and 661 yuan/hm², respectively. The application of polysulphte fertilizer not only helped to increase rape yield, but also had a certain effect on improving the economic benefits of rape. It is suggested that the suitable application rate of polysulphte fertilizer on rape is 375 kg/hm².

Key words: application amount of polysulphte fertilizer, rape（Brassica napus L.）, yield, economic benefit