Effects of different compound foliar fertilizers on the composition of Bupleurum chinense DC.
Objective Screening of foliar fertilizer formulations to enhance the quality of Bupleurum chinense DC.,to investigate the distribution pattern of the Saikosaponin in the xylem and phloem of Bupleurum chinense DC.,and to provide theoretical refer-ence for scientific fertilization and reasonable harvesting of Bupleurum chinense DC.Methods Three fertilizers,potassium dihydro-gen phosphate,trace element water-soluble fertilizer and potassium fulvic acid were selected,A three-factor,three-level or-thogonal experiment was designed to determine the contents of Saikosaponins A(Ss-a),D(Ss-d),C(Ss-c),F(Ss-f),and total Saikosaponins(Ss-s)in Bupleurum chinense DC.by HPLC;The experimental results were analyzed using Origin 2017,SPSS 25.0,etc.Results When the foliar fertilizer formulation was 50 g/acre of potassium dihydrogen phosphate+15 g/acre of trace element water-soluble fertilizer+13 g/acre of potassium fulvic acid,the content of Cyperus saponin-like compo-nents in Bupleurum chinense DC.showed a substantial increase;The Saikosaponins of all processing groups basically reached their peak on October 15,so the best harvesting period for Bupleurum chinense DC.is around October 15;The content of the five Sai-kosaponins in the phloem was much higher than that in the xylem,and the ratio of xylem to phloem in the stem gradually tended to 1∶1 over time.Conclusion Different compounded foliar fertilizers can significantly improve the quality and yield of Bupleurum chinense DC.,Foliar fertilizer spraying is an effective means to improve the quality of Bupleurum chinense DC.,and this study provides a theoretical reference for the reasonable water and fertilizer regulation of Bupleurum chinense DC.
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