Lorenz, Martin and Udén, Peter and Eriksson, Torsten
(2010).
Effect of wilting, silage additive, PEG treatment and tannin content on the distribution of N between different fractions after ensiling of three different sainfoin (Onobrychis viciifolia) varieties.
Grass and forage science. 65
:2
, 175-184
[Journal article]
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Official URL: http://dx.doi.org/10.1111/j.1365-2494.2010.00736.x
Abstract
Sainfoin (Onobrychis viciifolia) is a tanniniferous, leguminous plant that has potentially beneficial effects on protein utilization in ruminants. Since ensiling causes protein breakdown and elevated levels of buffer soluble N (BSN), we studied the distribution of N before and after ensiling sainfoin. Three varieties of sainfoin were either direct-cut and frozen directly or wilted and frozen before later ensiling in mini-silos with and without acidification with Promyr (PM; an acidifying commercial mixture of propionic and formic acid) and with or without polyethylene glycol (PEG). Extractable tannins (ET) and protein bound tannins (PBT) were measured with an HCl/butanol method in an attempt to correlate tannin levels to N fractions. The sainfoin silages showed good ensiling characteristics and had relatively high concentrations of un-degraded protein. The effect of wilting on BSN levels (g/kg N) was dependent on sainfoin variety (P<0.001). PEG increased and PM decreased the level of BSN in the silages (P<0.001). PM treatment also produced less non-protein N and ammonia-N (P<0.05) as compared with no additive. Addition of PEG to the silage increased the BSN-proportion 1.8- and 2.6-fold for both DM stages. A strong tannin-protein binding effect is, therefore, confirmed in sainfoin. However, correlations between tannin levels (ET and PBT) and BSN were poor in the (non-PEG) silages, indicating either that the HCl/butanol method is unsuitable for measuring tannin in silages or that qualitative attributes of tannins are more relevant than quantitative. The HCl/butanol method seems therefore not to be useful to predict degradation of protein in sainfoin silages.
Authors/Creators: | Lorenz, Martin and Udén, Peter and Eriksson, Torsten | ||||
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Title: | Effect of wilting, silage additive, PEG treatment and tannin content on the distribution of N between different fractions after ensiling of three different sainfoin (Onobrychis viciifolia) varieties | ||||
Series/Journal: | Grass and forage science (0142-5242) | ||||
Year of publishing : | 2010 | ||||
Volume: | 65 | ||||
Number: | 2 | ||||
Page range: | 175-184 | ||||
Publisher: | Blackwell Publishing Ltd. | ||||
ISSN: | 0142-5242 | ||||
Language: | English | ||||
Publication Type: | Journal article | ||||
Refereed: | No | ||||
Article category: | Scientific peer reviewed | ||||
Version: | Submitted version | ||||
Full Text Status: | Public | ||||
Subjects: | (A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 402 Animal and Dairy Science > Animal and Dairy Science. | ||||
Keywords: | legume, sustainability, tannin | ||||
URN:NBN: | urn:nbn:se:slu:epsilon-e-189 | ||||
Permanent URL: | http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-e-189 | ||||
Additional ID: |
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ID Code: | 8198 | ||||
Department: | (VH) > Dept. of Animal Nutrition and Management | ||||
External funders: | EU FP6 | ||||
Deposited By: | Martin Lorenz | ||||
Deposited On: | 26 Aug 2011 14:29 | ||||
Metadata Last Modified: | 02 Dec 2014 10:46 |
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