Trial Report Summary

Evaluation of different Inoculants on the Soybean Productivity

Crop Type(s):
Soybean
Centre(s):
PESAI
Year(s):
2016
Collaborators(s):

Laryssa Grenkow, Manitoba Pulse and Soybean Growers

Objective(s):

Soybeans grown in Manitoba are usually inoculated with Bradyrhizobium japonicum to ensure adequate bacteria populations are present to maximize nodulation and nitrogen fixation. Soybean farmers in Manitoba have a variety of inoculant choices available. The effectiveness of different inoculant types, however, is not fully understood in the various soybean-growing regions in Manitoba.

The current study is planned to determine if there is any additional yield benefit to:

1. Using in-furrow granular inoculant (instead of seed-applied liquid)

2. Double inoculating (seed-applied liquid + granular in-furrow) (compared to seed-applied liquid only)

3. Increasing the rate of inoculant (from 1x to 2x)

4. Using “enhanced” inoculant products

 

Project Findings:

Current study revealed that use of any kind or rate of inoculant did not result in greater soybean yield. Inoculant, even when applied at double dose, did not increase soybean yield. Manitoba Pulse and Soybean Growers are conducting this trial over many sites in Manitoba and it will be interesting to see how the overall results look like. Field history was not known in the present study conducted at Beausejour site. This field might have soybean grown in the past few years resulting in inoculant establishment in the soil.

 

PDF:

Entire findings are available by downloading the report PDF.

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