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Comparison of the in situ degradation parameters of fresh and frozen-thawed 15N-labelled alfalfa and ryegrass | ||
| Journal of Livestock Science and Technologies | ||
| مقاله 4، دوره 2، شماره 1، مرداد 2014، صفحه 24-30 اصل مقاله (488.62 K) | ||
| نوع مقاله: Research Article (Regular Paper) | ||
| شناسه دیجیتال (DOI): 10.22103/jlst.2014.735 | ||
| نویسندگان | ||
| R. Tahmasbi* ؛ A. Khezri؛ O. Dayani | ||
| Department of Animal Science, Faculty of Agriculture, Shahid Bahonar University of Kerman, 76169-133, Kerman, Iran | ||
| چکیده | ||
| Degradation of dry matter (DM) and nitrogen (N) in fresh or frozen-thawed alfalfa and ryegrass was studied by using in situ technique. The forages were labeled with 15N during growth in a glasshouse, harvested at similar growth phase, and fresh (F) or frozen-thawed (FT) samples were incubated in the rumen of 3 sheep. There was no difference (P>0.05) between forage type (S) for the immediately soluble fraction (a) and the insoluble but slowly degradable fraction (b) estimates for DM and N disappearance over time. However, 15N values for a and b were significantly (Pb (c) and potential degradability of DM, N and 15N; degradation rate of b for DM, N and 15N were higher for alfalfa. There was no effect due to sample preparation (M) in degradation rate (c) for DM and 15N but FT had a significantly (P15N. Mean estimates of effective rumen degradable protein due to forage species were significantly (Pin situ degradation determination the same preparation method be used throughout. | ||
| کلیدواژهها | ||
| fresh forages؛ in situ؛ degradation؛ dry matter؛ nitrogen؛ labeled nitrogen | ||
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