关键词: 柴胡, 除草剂, 质量, 产量, 除草剂残留

Abstract: Taking Bupleurum chinense as experimental material, this paper used 6 different herbicides (Trifluralin, Butralin, Chucaotong, Quizalofop-P-ethyl, Haloxyfop-R-methyl, Fluazifop-P-butyl) to treat Bupleurum chinense seeds before sowing and after seedling emergence, respectively, and pure water was taken as the contrast. The contents of saikosaponin a and d, total saponins, alcohol soluble leaching and herbicide residues were measured at the optimum harvesting period. At the same time, the effects of different herbicides on the yield, quality and pesticide residues in medicinal materials of Bupleurum chinense were analyzed. The results showed that the yields of Bupleurum were significantly improved by different herbicides, except Chucaotong. Among them, Trifluralin treatment got the highest yield with 1 387.5 kg/hm2, 65.09% higher than that of the contrast, followed by haloxyfop-R-methyl with 1 240.65 kg/hm2, 47.6% higher than that of the contrast. The changing trend of saikosaponin a and d contents were basically consistent, and the saikosaponin (a+d) content of all treatments was over 0.3%. The highest saikosaponin a and d contents were gained by Quizalofop-P-ethyl treatment. The total content of saikosaponins treated by herbicides was lower than that of the contrast, but all above 6% without significant difference. Herbicide residues were not detected in the 6 treatments. Combined with all these indexes, the results of subordination function method for the effects of different treatments were as following: Trifluralin > Fluazifop-P-butyl > water > Haloxyfop-R-methyl > Chucaotong > Butralin. Therefore, Trifluralin could be used before Bupleurum chinense sowing, and Quizalofop-P-ethyl be used after Bupleurum chinense seedling as better herbicide types.

Key words: Bupleurum chinense, herbicide, qualites, yield, herbicides residues