Soil Amendment Effects on Seed Quality in Organic Soybean and Wheat Seed Production. (4017)
Authors:
M.A. Bennett* - Ohio State University E.M. Grassbaugh - Ohio State University A.F. Evans - Ohio State University
Abstract:
Several soil amendments (composts, manures) were assessed for effects on soybean (‘Vinton 81’) and wheat (‘Karl’) seed yield and quality. There were no differences in soybean seed yield among the manure/compost treatments, conventional
fertilizer, or no-amendment controls. Initial seed quality results [std. germination (SG), cold test (CT), accelerated aging (AA)] from tests conducted within 1 mo. of seed harvest were also similar among all 6 soil amendments. Seed pathogen levels (Penicillium, Rhizopus, Alternaria, Fusarium, Phomopsis spp.) were also identified and quantified, with Alternaria most commonly detected. Seed quality after 6 mo.
of storage was not different for SC and AA tests, but differences in CT values were significant. Results after 1 yr. of storage indicated SG differences, but seedlots from all soil amendments achieved over 80% germination. Wheat was grown and
harvested (2003) from the soil amendment plots used to produce soybeans the prior year. Initial wheat seed quality results (SG, 100 seed wt., percent head scab) were similar for all amendment treatments. Wheat seed samples were also tested using a thermogradient table, at 2 degree intervals between 10-28 degrees C. Most initial germination results (3, 5, 7, and 10d) over the ten temperature regimes were not different; data are also being collected for the wheat seedlots after 1 yr. of storage.
Speaker Information: Mark Bennett, Ohio State University, Dept. of Hort. & Crop Science 312A Kottman Hall 2021 Coffey Road, Columbus, OH 43310; Phone:
614.292-3864; E-mail: [email protected]
Session Information: Tuesday, November 2, 2004, 1:00 PM-3:00 PM Presentation Start: 1:00 PM (Poster Board Number: 0835)
