除草剂对白芨及其共生真菌KB-3的影响  

Effect of Herbicides on Bletilla striata and Its Symbiotic Fungus KB-3

作　　者：施秀飞 刘影 陈新刚 周燚[1] 杜晓英[1] SHI Xiu-fei;LIU Ying;CHEN Xin-gang;ZHOU Yi;DU Xiao-ying(College of Agronomy,Yangtze University,Jingzhou 434025,Hubei,China)

机构地区：[1]长江大学农学院,湖北荆州434025

出　　处：《农药》2020年第3期215-218,共4页Agrochemicals

摘　　要：[目的]明确除草剂对白芨及其共生真菌KB-3的影响,为其在白芨田的科学使用提供依据。[方法]采用菌丝生长速率法测定14种除草剂对KB-3的抑制作用;采用盆栽试验,探究4种除草剂对白芨及其根际KB-3数量的影响。[结果] 500 g/L氟噻草胺悬浮剂、35%二甲戊灵悬浮剂、25%砜嘧磺隆水分散粒剂和75%氯吡嘧磺隆水分散粒剂在使用剂量下对KB-3无显著影响,对白芨无药害症状。[结论]氟噻草胺等4种除草剂在使用剂量下对白芨及其共生真菌KB-3安全。[Aims] This study aims to evaluate the effect of herbicides on Bletilla striata and its symbiotic fungus KB-3 to provide a basis for its scientific use in B. striata field. [Methods] The inhibition of 14 herbicides on KB-3 was determined by mycelium growth rate method. Potted experiment was conducted to explore the effects of 4 herbicides on the number of B. striata and its rhizosphere kb-3. [Results] Flufenacet 500 g/L SC, pendimethalin 35% SC, rimsulfuron25% WG and halosulfuron-methyl 75% WG had no significant effect on KB-3 and no harmful symptoms on B. striata.[Conclusions ] The four herbicides, such as flufenacet, are safe to B. striata and its symbiotic fungus KB-3 at the application dose.

关 键 词：除草剂 白芨 KB-3 抑菌活性 根际土壤 

分 类 号：S482.4[农业科学—农药学]