Many pre- and post-mowing on-farm traits influence mycotoxin occurrence and conventional chemical compositionin grass silages. The objective of this study was to determine if observed on-farm pre- or post-mowing factors can be used to indicate mycotoxin occurrence or conventional chemical composition traits in grass silages. Over a two year period (2012-2013 and 2013-2014) 290 grass silages were sampled on 145 farms and these consisted of baled (n=115) and pit (n=175) silages. On each farm in each year, a questionnaire was completed and pre- and post-mowingfactors recorded. The preservation quality was better in pit compared to baled silages in both years and in silages made in Year 2 compared with Year 1. On-farm pre- and post-mowing factors were generally not secure indicators of silage conventional chemical characteristics. In contrast, the occurrence of enniatins and beauvericin generally increased with harvesting month (May-October) for grass silages. Visible mould on baled grass silages and a rottedtop layer with pit grass silages were associated with andrastin A, mycophenolic acid and roquefortine C occurrence.
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Many pre- and post-mowing on-farm traits influence mycotoxin occurrence and conventional chemical compositionin grass silages. The objective of this study was to determine if observed on-farm pre- or post-mowing factors can be used to indicate mycotoxin occurrence or conventional chemical composition traits in grass silages. Over a two year period (2012-2013 and 2013-2014) 290 grass silages were sampled on 145 farms and these consisted of baled (n=115) and pit (n=175) silages. On each farm in each year, a questionnaire was completed and pre- and post-mowingfactors recorded. The preservation quality was better in pit compared to baled silages in both years and in silages made in Year 2 compared with Year 1. On-farm pre- and post-mowing factors were generally not secure indicators of silage conventional chemical characteristics. In contrast, the occurrence of enniatins and beauvericin generally increased with harvesting month (May-October) for grass silages. Visible mould on baled grass silages and a rottedtop layer with pit grass silages were associated with andrastin A, mycophenolic acid and roquefortine C occurrence.
| All Time | Past 365 days | Past 30 Days | |
|---|---|---|---|
| Abstract Views | 194 | 75 | 10 |
| Full Text Views | 10 | 4 | 0 |
| PDF Views & Downloads | 9 | 4 | 0 |