【摘要】 在接种Glomus intraradices和Glomus mosseae的大豆植株盆栽钵中,按大田常规用量,施用乙草胺、丁草胺、灵达、骠马和精喹(禾灵)5种除草剂,显著减少了大豆植株的生物量和土壤中AM真菌菌丝的总量,降低了丛枝菌根(arbuscular mycor-rhiza,AM)真菌侵染率、菌丝碱性磷酸酶(alkaline phosphatase,ALP)和琥珀酸脱氢酶(succinate dehydrogenase,SDH)活性。处理6周后,显著降低大豆植株生物量的除草剂为乙草胺和丁草胺,植株生物量前者为12.6、14.5 g,后者为12.7和15.5 g,影响较小的为精喹(禾灵)(植株生物量各为20.8、23.5 g),而对照的生物量为29.5、30.8 g;显著减少AM真菌侵染率的除草剂为丁草胺(AM真菌侵染率为17.4％、24.1％),影响较小的为乙草胺和灵达(前者为29.3％、30.7％,后者为26.3%和32.2％),而对照侵染率为78.5％、62.4％;显著降低AM真菌菌丝ALP和SDH酶活性的除草剂为丁草胺(ALP为10.2％、13.6％,SDH为13.5％、18.8％),影响较小的为乙草胺和灵达(前者ALP为15.7％、17.4％,后者为13.9％、17.8％,SDH前者为22.4％、23.5％,后者为19.8％、25.0％),而对照的ALP为47.0％、36.3％,SDH为62.7％、48.4％;此外,除草剂也使土壤中AM真菌菌丝的总量显著减少。更多还原

【Abstract】 In pot experiments, the trail results showed that herbicides of acetochlor, butachlor, glyphosate-isopropylammonium, aventis and quizalofop-p-ethyl reduced significantly the biomass of soybean, infection rates of AM fungus, mycelium enzyme activity of ALP and SDH, and total mycelium amount of AM fungi in the soil. After treatment for 6 weeks, acetochlor and butachlor decreased remarkably the biomass of soybean (the biomass was 12.6-15.5 g), however, quizalofop-p-ethyl had the less impact on biomass of soybean (the biomass was 20. 8-23.5 g), and the biomass of trail control was 29.5-30.8 g; butachlor reduced significantly the infection rates of AM fungi (AM fungal infection rates were 17. 4%-24.1 % ) , acetochlor and glyphosate-isopropylammonium had the less impact on the infection rates of AM fungi (the infection rates were 29. 3%-32.2%) , while the infection rates of the controls were 78.5%-62. 4% ; butachlor also influenced significantly the enzyme activity of AM mycelium ALP and SDH (ALP were 10. 2%-13. 6%, SDH were 13. 5% -18. 8%) , acetochlor and glyphosate- isopropylammonium had the less impact on the enzyme activity of AM fungi mycelium ALP and SDH (ALP was 13. 9%-17. 8%, SDH was 19. 8%-25. 0%), while the mycelium ALP of the control was 47. 0%-36. 3%, the mycelium SDH of the control was 62. 7% -48.4%; besides, herbicides also reduced significantly total mycelium amount of AM fungi in the soil.更多还原