覃剑锋 段龙飞 蔡阳光 郭邦利 陈国爱

摘要：【目的】为探究六种不同生物制剂对魔芋生长的影响，以期明确EM菌剂和木酷液在防控魔芋软腐病中的应用潜力。【方法】大棚试验设置A1空白对照，A2木酷液，A3EM菌，A4乐圣土壤修复剂，A5荧光假单胞杆菌共5个处理组，大田设置B1空白对照，B2EM菌、B3木酷液，B4大蒜素，B5亚康力诺有机多肽酶活性促进剂共5个处理组，统计两种试验不同试剂处理下魔芋的出苗率、齐苗期、软腐病发病率、葡甘聚糖含量、产量、土壤微生物数量等指标。【结果】大蒜素、木酷液、EM菌均能在一定程度上提高魔芋出苗率，木酷液对魔芋软腐病的防治效果最好，其次是EM菌，且EM菌处理后地块的土壤微生物数量明显增多。【结论】木酷液具有较好的防治魔芋软腐病的效果，同时在一定程度上可以调节土壤中的微生物菌群，建议使用木酷液防治魔芋软腐病。

关键词）生物制剂;EM菌;木酷液;魔芋;软腐病;生长

中图分类号：s476+.9文献标识号：A文章编号：1003-4374（2021）05-0043-06

Study on the Effects of Six Different Biological Agents on the Growth of Konjac

0in Jian-feng. Duan Long-fei*，Cai Yang-guang，Guo Bang-li，Chen Guo-ai  （Ankang Acedemy of Agricultural sciences，Ankang，shaanxi 725021，China）

Abstract：【0bjective】In order to study on the effects of six different biological agents on the growth of konjac，and to define the application potential of EM bacteria and wood vinegar in the prevention and control of konjac soft rot.【Method】Greenhouse experiments were setting as follows： A1. Blank control; A2. wood vinegar; A3. EM bacteria; A4. Lesheng soil remediation agent; A5. Pseudomonas fluorescens was used in 5 treatment groups in total;  Field experiments were setting as follows： B1. Blank control; B2.EM bacteria; B3. wood vinegar; B4. Allicin; B5. Aconlino organic polypeptidase activity promoter was used in 5 treatment groups in total. The index of statistics were the emergence rate，even degree of stage，incidence  of  soft  rot，glucomannan  content，yield  and  soil  microbial  number  of  konjac  under different agents of two experiments.   【Result】The results showed that allicin，wood vinegar and EM bacteria can improve the emergence rate of konjac to a certain extent. The wood vinegar had the best control effect on konjac soft rot，followed by EM bacteria and the number of soil microorganisms in the plot treated with EM bacteria increased significantly.   【Conclusion】wood vinegar has a good control effect on konjac  soft rot，and can regulate the  microbial flora  in the  soil to  a  certain  extent.  It  is suggested to use wood vinegar to control konjac soft rot.

Key wor4s：biological agents，EM bacteria，wood vinegar，konjac，soft rot，growth

魔芋（Amorphopha11us）屬天南星科多年生草本植物，在中国、日本等地作为食物和药材广泛种植。[1]魔芋地下球茎因富含可溶性膳食纤维葡甘聚糖而广泛应用于食品、医药等多个领域。[2，3]近些年，随着魔芋经济价值的不断挖掘，越来越多的农户投身魔芋产业，魔芋已成为山区农户致富增收的主导产业之一。[4]在魔芋的生产中，细菌性软腐病是为害最为严重的病害，且随着种植年限的延长，土壤中病原菌数量大量积累，导致病害防控难度不断增大。……