Estimate of the nutritive value of maize silage
2012
Arrigo, Y. | Stoll, P., Forschungsanstalt Agroscope Liebefeld-Posieux ALP, Posieux (Switzerland)
In order to check and improve the prediction of their nutritive value, 12 maize silages were studied as a supplement to the previous trials. Two varieties (Amadeo and LG32,52) were harvested at three different stages over the course of two years. The silages were studied to determine organic-matter digestibility (OMD) in the case of sheep, and nitrogen degradability (ND) in the case of fistulated cows. The chemical compositions differed more between years than between varieties. The OMDs of the plants increased with maturity, with the milky stage differing (p0,01) from the two wax-ripe stages (69,1 % vs. 74,9 % and 76,8 %), without distinction between the two varieties, whilst the ND decreased. In the hard-dough stage, the coefficient was lower (66,5 %, p0.01) than that of the other stages (76,5 % for the milky and 77,8 % for the soft-dough stage, respectively). The ND of the two varieties was similar (p
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