LP3,LP5杆菌的防病作用及其对梨幼苗的促生效应  

Disease Prevention and Growth Promotion Effects in Pear Seedlings of Endophytic Bacillus Strains LP3 and LP5

作　　者：张宝俊[1] 高振峰[1] 韩巨才[1] 刘慧平[1] 

机构地区：[1]山西农业大学农学院,山西太谷030801

出　　处：《山西农业科学》2013年第5期481-484,共4页Journal of Shanxi Agricultural Sciences

基　　金：山西省科技攻关项目(20110311013-1);山西省青年科技研究基金项目(2012021025-2);山西农业大学科技创新基金项目(201221)

摘　　要：测定了内生芽孢杆菌LP3,LP5菌株对梨采收后果黑斑病的预防和治疗效果,并通过盆栽试验分析了这2个菌株对梨幼苗的促生效应。结果表明,LP3,LP5对9种病原菌的抑制率分别在42.3%～87.3%和45.6%～92.6%之间;其对梨黑斑病兼具预防和治疗作用,经LP3,LP5发酵液处理的梨果接病菌5 d后,防效分别为81.53%,88.92%;LP3,LP5处理病果3 d后,病斑扩展抑制率分别达65.64%和72.48%;LP3,LP5能促进梨树幼苗的生长,经这2个菌株处理的梨树幼苗初生枝长度分别比对照提高了50.48%和21.83%,鲜质量分别比对照增加35.67%,31.16%,干质量分别比对照增加29.24%,20.75%。The preventive and therapeutic effects of endophytic bacillus strains LP3 and LP5 against black spot disease in postharvest of pear fruits were determined, and the growth-promotion of 2 strains to pear seedlings was analyzed through pot experiments. The results showed that the inhibition rates of 2 strains against 9 phytopathogenic fungi were 42.3% - 87.3% and 45.6% - 92.6%, respectively. And the 2 strains had both protection and control activities to black spot disease of pear. The control efficiency of LP3 and LP5 strains in the 5 d after inoculating A lternaria kikuchiana were 81.53% and 88.92% respedtively, and the inhibition rates on lesion expansion were 65.64% and 72.48% respectively on the 3th day after the black spots diseases of pear were treated by strain LP3 and LP5; the strain LP3 and LP5 could significantly promote pear seedlings growth. The length of new branch increased 50.48% and 21.83% after treatment by strain LP3 and LP5 fermentation broth, respectively. And the plant height and dry weight of pear seedlings increased by 35.67%, 31.16% and 29.24%, 20.75% than the control group, respectively.

关 键 词：内生芽孢杆菌 梨黑斑病菌 防效 促生作用 

分 类 号：S436.612.14[农业科学—农业昆虫与害虫防治]