| Autor: |
S.L. Fales, S.C. Bosworth, D.L. Gustine, R.J. Hoover |
| Rok vydání: |
1987 |
| Předmět: |
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| Zdroj: |
Journal of Dairy Science. 70:2402-2405 |
| ISSN: |
0022-0302 |
| DOI: |
10.3168/jds.s0022-0302(87)80301-6 |
| Popis: |
Cruciferous forages ( Brassica sp. ) contain glucosinolates and S-methylcysteine sulfoxide, compounds that are potentially toxic to livestock, but there is little information concerning the possible effects of ensiling on these constituents. This study compared concentrations of glucosinolates and S-methylcysteine sulfoxide in rape ( Brassica napus L.) forage before and postensiling after 0, 4, or 25h of field wilting. Field-grown rape was harvested 100 d after planting and immediately ensiled in laboratory scale silos or wilted for 4 or 25h prior to ensiling. After 30 d, silages were frozen and stored at −20°C. Unensiled samples also were frozen at −20°C for an estimate of glucosinolates and S-methylcysteine sulfoxide in fresh forage. In addition to analysis for glucosinolates and S-methylcysteine sulfoxide, determinations were made of DM concentration in fresh and ensiled material and pH of the silage. Ensiling reduced glucosinolate concentration from approximately .3 to .03% of DM and wilting had little additional effect. Ensiling slightly but significantly reduced S-methylcysteine sulfoxide; wilting had no significant additional effect. Results of this study indicate that ensiling can effectively reduce the potential toxicity of rape forage. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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