大豆除草剂对2种丛枝菌根的影响

被引:3
作者
董昌金
赵斌
机构
[1] 华中农业大学农业微生物国家重点实验室
[2] 华中农业大学农业微生物国家重点实验室 武汉 湖北师范学院生物系
[3] 黄石
[4] 武汉
关键词
除草剂; AM真菌; 侵染率; SDH; ALP;
D O I
10.13926/j.cnki.apps.2004.06.007
中图分类号
S482.4 [除草剂(杀草剂)];
学科分类号
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。
引用
收藏
页码:518 / 524
页数:7
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