芽孢杆菌SL-23和SL-44对加工番茄防病促生效果的研究

Study on Effect of Growth Prmotion and Control Diseases to Processing Tomato of Bacillus sp.SL-23 and SL-44

从加工番茄根际土壤中分离到两株具有促生拮抗作用的芽孢杆菌SL-23和SL-44。分别用两株芽孢杆菌的发酵液处理番茄的立枯丝核菌菌片,其电导率与呼吸强度均出现先升后降的变化。在防治加工番茄苗期立枯病的盆栽实验中,芽孢杆菌SL-23和SL-44的防治效果分别可达49.96%和20.65%。而化学试剂五氯硝基苯的防治效果仅为0.81%。种子发芽试验和幼苗促生试验表明,芽孢杆菌SL-23和SL-44可促进加工番茄幼芽和苗期的生长,分别提高发芽率12.5%和18.75%,苗期SL-44的促生效果尤为显著,植株鲜重和干重的增加量分别可达70.9%和53.14%。

Bacillus sp. strains SL- 23 AND SL - 44 that can promote growth and suppress diseases of processing tomato were selected from processing tomato rhizasphere Soil. The electric conductivity and respiratory intensity of Rhizoctonia solani mycelium treated by SL - 23 and SL - 44 were ascending and then descendent. In the greenhouse experiment, strains SL - 23 and SL - 44 showed 46.96% and 20.65% control effeciency to control Rhizoctonia rot of processing tomato, respectiely. While the control effeeiency of the PCNB only was 0.81%. In germination test and the seedling stage test, the 2 Bacillus sp. strains can promote the growth of processing tomato sprouts and seedlings. Germination rate was increased by 12.5% and 18.75%, respectively. Especially the strain SL - 44 can increase weight of fresh matter and dry matter of plant by 70.9 % and 53.14 % in the seedling stage, respectively.