Table 2 A list of studies reporting the legacy effect of microbial inoculants.
Crop species | Cropping system | PGPR Strains | Inoculation stage | Persistence duration | Production system | Effects on plants | References |
|---|---|---|---|---|---|---|---|
Pepper | Monoculture | Bacillus velezensis NJAU-Z9 | Pre-inoculation of seedlings | Two season trial legacy throughout growth stages | Field experiment | Higher rhizosphere bacterial richness which resulted in plant growth promotion and steady yield enhancement | |
Faba bean and potato | Rotation | Rhizobium gallicum 8a3 and/ or Ensifer meliloti 4H41 | Pre-inoculation of faba bean seedlings at two leaf stage | March-June 2009 for faba bean September-December 2009 for potato grown in rotation | Field experiment | Rhizobial strains stimulated faba bean growth and enhanced its rotational effect in potato cropping systems by providing fixed N, increasing microbial diversity which all enhance its growth and resistance to diseases | |
Faba bean | Monoculture | Agrobacterium sp. 10C2 | Sowing seeds in soils previously inoculated for 15 days | 80 days post-soil inoculation | Greenhouse experiment | Inoculation increased nodule number, plant biomass, as well as grains’ P, polyphenols, flavonoids and total antioxidant capacity. richness and structure of potential bacterial phyla were positively induced. | |
Oat and alfalfa | Rotation | Sinorhizobium meliloti and/ or Azotobacter spp., Pseudomonas sp., Enterobacter sp., Bacillus megaterium | – | – | Greenhouse experiment | Promoted alfalfa growth, yield and N-accumulation through the inoculation of a preceding oat crop | |
Ryegrass and alfalfa | Rotation | Sinorhizobium meliloti L3Si | Inoculation of sown reygrass seeds | 6 weeks for reygrass in 2009 6 weeks for alfalfa in 2010 | Greenhouse experiment | Inoculation enhanced growth of both plants and increased rhizobial abundance, nodulation, and total N-uptake of subsequent alfalfa planst | |
Maize and wheat | Monoculture | Bacillus sp | Maize seed coated with the PSB | Between 5 June to 10 September 2016 for maize and fall of 2016–2017 for wheat | Field experiment | Inoculation improved grain yield, soil properties, RP solubility and P-uptake in both plants | |
Alfalfa - wild rye | Intercropping | Sinorhizobium meliloti | Inoculation of sown seeds | Two years experiment from 2006 to 2008 | Field experiment | Inoculation induced remarkable shifts of the rhizosphere bacterial communities, and enzyme activities after and enhanced yield parameters |
