Figure 2.

Canonical correspondence analysis ordination biplots on bacterial community composition of lettuce (A), leek 2018 (B) and leek 2019 (C) rhizosphere soil samples under four treatment regimens. Direction of vectors for treatments of ‘Manure’ (untreated manure, M0611H, M0611L) and NPK, ‘Inoculum Level’ (M0611H versus M0611L) and ‘E. coli 0611’ (presence of strain 0611 in M0611H and M0611L versus absence in untreated manure and NPK treatments) are indicated by arrows in the biplot. The impact of ‘Manure’ on bacterial community composition in lettuce, leek 2018 and leek 2019 rhizosphere soils was significant at levels of, respectively, 0.012, 0.011 and 0.013 (PERMANOVA, R² values, respectively, 0.24, 0.18, 0.24) and of ‘E. coli 0611’ was, respectively, 0.008, 0.033, 0.025 (PERMANOVA, R² values, respectively, 0.24, 0.17, 0.15).