Animal Husbandry and Feed Science ›› 2023, Vol. 44 ›› Issue (3): 89-95.doi: 10.12160/j.issn.1672-5190.2023.03.013

• Pratacultural Science • Previous Articles     Next Articles

Weed Control Efficacy of Different Herbicides in Astragalus membranaceus Fields and The Influences on Astragalus membranaceus Biomass and Medicinal Material Yield

LI Xue,YIN Dabao,LIU Zhiyao,WAGN Jian,WANG Junjie   

  1. College of Grassland,Resources and Environment,Inner Mongolia Agricultural University/Inner Mongolia Autonomous Region Engineering Technology Research Center of Chinese and Mongolian Medicinal Materials,Hohhot 010010,China
  • Received:2023-02-22 Online:2023-05-30 Published:2023-07-12

Abstract:

[Objective] This study was conducted to assess the effects of different herbicides on the above-ground biomass accumulation and medicinal material yield of Astragalus membranaceus, and to evaluate their weed control efficacy in Astragalus membranaceus fields. [Method] Five types of post-emergence herbicides, including Herb Weed No.1 (YCC), bentazone (MCS), clethodim (XCT), haloxyfop (GCN), and sethoxydim (NBJ), were applied on the annual Astragalus membranaceus var. mongholicus transplanted seedlings according to the recommended concentrations. Water was sprayed as the control (CK). Each herbicide application treatment was repeated 3 times and a total of 18 experimental blocks were set. At the beginning of June 2021, the quadrat method was used to determine the number of plant, fresh mass, and dry mass of weeds in each experimental block. On July 10th, August 10th, and September 10th in the same year, the above-ground biomass fresh weight and dry weight of Astragalus membranaceus var. mongholicus in each experimental block were measured. In the harvest season (November in the same year), the fresh weight and dry weight of medicinal material of Astragalus membranaceus var. mongholicus in each experimental block were calculated. Variability analysis and single factor analysis of variance were utilized to assess the statistical data. [Result] The five herbicides had varying weed control efficacy, among which the YCC treatment group had the best, with stem control effect of 77.81%, fresh mass control effect of 64.48%, and dry mass control effect of 80.81%. There were no significant (P>0.05) differences in the above-ground biomass fresh weight, dry weight, and fresh-dry ratio of Astragalus membranaceus var. mongholicus across the different herbicide treatment groups in July, August and September. In November, the fresh weight and dry weight of medicinal material of Astragalus membranaceus var. mongholicus in the YCC treatment group were significantly (P<0.05) higher than those in the other treatment groups. [Conclusion] The application of Herb Weed No.1 displayed superior weed control efficacy in the transplanted fields of Astragalus membranaceus var. mongholicus, with notable promoting effects on the above-ground biomass and medicinal material yield.

Key words: herbicide, Astragalus membranaceus, biomass, fresh-dry ratio, weed control efficacy, yield

CLC Number: