Field comparison of pre-inoculated alfalfa seed and traditional seed inoculation with inoculant prepared in sterile or non-sterile peat
Title:
Field comparison of pre-inoculated alfalfa seed and traditional seed inoculation with inoculant prepared in sterile or non-sterile peat
Author:
Rice, Wendell A. Olsen, Perry E. Lupwayi, Newton Z. Clayton, George W.
Appeared in:
Communications in soil science and plant analysis
Paging:
Volume 32 (2001) nr. 13-14 pages 2091-2107
Year:
2001-09-27
Contents:
Rhizobium inoculant products in North America are often prepared using non-sterile peat and may contain more contaminants than rhizobia. The effectiveness of sterile and non-sterile peat-based inoculants applied to alfalfa (Medicago sativa) seed using either traditional seed inoculation just before planting, or pre-inoculated and commercially coated, were evaluated for three years (eight harvests) at two sites in northwestern Alberta. Seeds inoculated just before planting had more rhizobia at planting time than pre-inoculated seed. When results from all the three years were combined, inoculation with Rhizobium, either seed-applied or pre-inoculated, significantly (P<0.05) increased nodule dry matter (DM) at both sites. However, the response of forage N and DM yields to inoculation were significantly higher with seed application than with seed coating at one site, and vice-versa at the other site. Differences resulting from the use of non-sterile peat or sterile peat were not significant.