Bacillus asahii OM18菌剂载体筛选及其对玉米的促生效果

Screening Inoculant Carrier of Bacillus asahii OM18 and Its Effect on Maize Growth Promoting

芽胞杆菌Bacillus asahii OM18是潮土地力提升的关键土著微生物.为了将该菌种资源应用到提升华北平原潮土地力的实际农业生产中,也为了促进农业废弃物资源化应用,本研究以5种农业废弃物生产的有机肥(封丘站有机肥、鸡粪有机肥、酒糟有机肥、菜粕有机肥和牛粪有机肥)为研究对象,通过评价B.asahii OM18在有机肥中的生长繁殖以及对作物的促生效果,系统性地筛选出适合该菌种生长和发挥生态功能的菌剂载体.结果表明,菜粕有机肥适合作为B.asahii OM18菌剂制备的载体,以菜粕有机肥制备的B.asahii OM18菌剂回接到潮土后,施有机肥接种OM18菌剂(Inoculant)处理玉米茎叶干重(9.27±0.95)g显著高于其他处理(P<0.05),在潮土中能够显著促进玉米的生长.因此,以菜粕有机肥为载体复合B.asahii OM18菌剂有助于我国华北平原地力的提升.

Bacillus asahii OM18 is a key autochthonous microbe responsible for the enhancement of soil fertility of fluvo-aquic soils.In order to apply it to improve the soil fertility of Fluvo-aquic soils in actual agricultural production in the North China Plain and to promote the utilization of agriculture wastes,five kinds of organic fertilizers produced by agriculture wastes(FengQiu organic manure,chicken manure,vinasse organic compost,oil cake organic compost,and cow manure)were screened and evaluated through the growth of Bacillus asahii OM18 in organic fertilizers and their promoting effect on the growth of crops.The suitable organic fertilizer was screened out systematically as the inoculant carrier,which benefit for the growth and ecological function of Bacillus asahii OM18.The results showed that oil cake organic compost(XS)was suitable as the carrier for the preparation of Bacillus asahii OM18 microbial inoculant.Furthermore,oil cake organic compost(XS)combined with Bacillus asahii OM18 inoculant was tested to promote the growth of maize in the fluvo-aquic soils by potting.Compared to other treatments,the dry weight of maize shoots and leaves of Inoculant treatment(9.27±0.95 g)was significantly higher(P<0.05).Oil cake organic compost with Bacillus asahii OM18 inoculant could significantly promote the growth of maize in the fluvo-aquic soils.Therefore,Bacillus asahii OM18 microbial inoculant combined with oil cake organic compost is beneficial to improving soil fertility in the North China Plain.