Effects of specific herbicide'Duzajing No.1'on the-community structure of Oxytropis Spinosa in alpine desert grassland
[Objective]This study aims to explorethe effects of the specific herbicide'Duzjing No.1'on the-growth of OxytropisS pinosa and its impact on community structure in alpine desert grassland,providing a scientific basis for controlling poisonous weeds and restoring degraded alpine desert grasslands.[Method]In May 2020 and May 2021,the biological protective agent and herbicide'Duzajing No.1'were appliedusing a DJI MG-1P intelli-gent plant protection unmanned air vehicle(UAV),and the herbicide's effect on biodiversity was investigated.[Result]1)The specific herbicide significantly reduced the importance value of O.spinosa,which decreased by 44.24%in 2020 and 55.30%in 2021.The importance value of other plant species increased,with Stipa capil-latashowingthe largest increase,significantly higher than that of other plant species.2)Theherbicide significantly re-duced the abundance of shrubs and O.spinulosa,with average decreases of 20.9%and 85.9%,respectively,over two years.3)The specific herbicide hadnosignificant effect on shrub height,herbaceous plant height,or community canopy height.4)Theherbicide significantly reduced the Simpson diversity index of shrubs by 14.1%,and significantly in-creased the Margalefrichness index of shrubs by 13.23%over the two years.However,the Shannon-Wiener index,Margalefrichness index,and evenness index of herbaceous plants were not significantly affected.[Conclusion]The re-sults indicatethat spraying the specific herbicide'Duzajing No.1'effectively reducesthe abundance of Oxytropisspi-nosa without significantly inhibitingother plant species,thusoptimizeing community structure.
万方数据
维普
