RELATIONSHIP BETWEEN SOYBEAN VARIETIES, SPAD502 CHLOROPHYLL METER READINGS, AND RHIZOBIA INOCULATION IN WESTERN SIBERIA - Ecological Consequences of Increasing Crop Productivity - page 93

FIGURE 10.4 Roots from two Sibniik315 plants without (A) and with (B) inoculation, sliced
nodule (C) during full flowering (BBCH 65).
According to the amount of nodules among the inoculated variants also the SPAD-
502 chlorophyll meter readings showed differences. SPAD values tended to be higher
with inoculation than in the untreated control group (Figures 10.5-10.7). Signifi cant
differences appeared at the third measurement (latest observed stage) during the mid-
dle of seed development. In average, Aveline showed the highest increase in SPAD
values (+20.3%, Figure 10.5) compared to control, followed by Augusta (+12.7%,
Figure 10.6) and Sibniik315 (+9.8%, Figure 10.7).
FIGURE 10.5 SPAD meter readings from Aveline at beginning of side shoot formation
(BBCH 21), end of flowering (BBCH 70) and mid of seed development (BBCH 75).