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Effects of Bacillus subtilis and Pseudomonas fluorescens Inoculation on Attributes of the Lettuce Soil Rhizosphere Microbial Community: The Role of the Management System

Submitted by Elsewhere on 2020-Sep-19 Sat 08:00

Inoculation with beneficial microbes has been proposed as an effective practice for the improvement of plant growth and soil health. Since soil acts as a physicochemical background for soil microbial communities, we hypothesized that its management will mediate the effects of microbial inoculants on the indigenous soil microbes. We examined the effects of bacterial inoculants [Bacillus subtilis (Ba), Pseudomonas fluorescens (Ps), and both (BaPs)] on the growth of Lactuca sativa cultivated in soils that originated from an organic maize (OS) and a conventional barley (CS) management system. Moreover, the biomass and the community structure of the rhizosphere microbial communities and the soil enzyme activities were recorded. The root weight was higher in CS than OS, while the foliage length was greater in OS than CS treatments. Only in OS pots, inoculants resulted in higher biomasses of bacteria, fungi, and actinomycetes compared to the control with the highest values being recorded in Ps and BaPs treated soils. Furthermore, different inoculants resulted in different communities in terms of structure mainly in OS soils. For soil enzymes, the effect of the management system was more important due to the high organic matter existing in OS soils. We suggest that for microbial inoculation to be effective it should be considered together with the management history of the soil.

Microbial enriched growing media

Submitted by Elsewhere on 2020-Aug-24 Mon 09:40

The biological suppression of common plant diseases increasingly becomes the preferred alternative to chemical plant protection. Adding biostimulants to a growing medium can induce the required suppressing effects. Based on long-term research, Klasmann-Deilmann has developed TerrAktiv PLUS, a unique constituent consisting of…

'Microorganisms can be a great tool to achieve more efficient agriculture'

Submitted by Elsewhere on 2020-Aug-13 Thu 10:08

A research project developed by Ideagro to reduce the application of fertilizers in agriculture through the contribution of microorganisms is obtaining important results in melon, tomato, broccoli, apricot, and citrus crops in an experimental farm located in the Murcian district of Yechar. The Minister…

Researchers discover how plants distinguish beneficial from harmful microbes

Submitted by Elsewhere on 2020-Aug-11 Tue 09:38

Legume plants know their friends from their enemies, and now, researchers found how they do it at the molecular level. Plants recognize beneficial microbes and keep harmful ones out, which is important for healthy plants production and global food security. Scientists have now discovered how legumes use…