Effect of Barley or Rape Seed Cake as Supplement to Silage for High-Yielding Organic Dairy Cows

Italian ryegrass silage in winter feeding of organic dairy cows: forage intake, milk yield and composition

“…Although a slightly negative effect of treatment RG was found for both primiparous and older cows (in their fourth or higher lactation), the extent of the decrease (0.8 and 0.6% points respectively) does not seem practically relevant. The general level of nitrogen efficiency found in the present experiment (24.6–24.7%) is in accordance with values calculated for organic dairy cows fed clovergrass silage and whole‐crop cereal silages, supplemented with either barley or rape seed cake,31 but lower than the mean (27%) for milk production systems with low nitrogen input given by Castillo et al 32…”

Concentrate Mixture, Grass Pellets, Fodder Beets, or Barley as Supplements to Silage ad libitum for High-yielding Dairy Cows on Organic Farms

“…The concentrate mixture in the present experiment, as with the rape seed cake, added protein and fatty acids to the ration. An explanation for the different findings could be that in the experiment by Mogensen & Kristensen (2002) the amount of supplementary feed compared was smaller than in the present experiment. Furthermore, a lower proportion of clover grass silage in the ad libitum feed in the present experiment resulted in a less favourable nutrient composition, in particular for the barley diet with a low level of crude protein, a low protein balance in the rumen, a low level of amino acids absorbed from the small intestine, and a high level of starch.…”

“…The findings were in contrast to an earlier experiment comparing 2.5 SFU rape seed cake and 2.5 SFU barley as supplement. This experiment showed no difference in milk yield between the two types of supplementary feed (Mogensen & Kristensen, 2002). The concentrate mixture in the present experiment, as with the rape seed cake, added protein and fatty acids to the ration.…”

“…An experiment, carried out by Mogensen & Kristensen (2002), showed unexpectedly that barley on a net energy basis could replace rape seed cake as a supplement to clover grass silage ad libitum without milk yield reduction. This was surprising as the rape seed cake supplement provided a more balanced ration compared to the supplement of starch from barley.…”

Description and evaluation of a net energy intake model as a function of dietary chewing index

“…The included experiments were retrieved from a Scandinavian database and used both Latin square and continuous designs and were chosen because their feeding, housing, and management were similar to those in the data used for modeling. Data included in this evaluation have previously been published and were all conducted in Denmark, Sweden, Poland, or the United States (Casper and Schingoethe, 1988;Piepenbrink et al, 1996;Armentano et al, 1997;Bremmer et al, 1997;Overton et al, 1998;Xu et al, 1998;Bateman et al, 1999;Pisulewski and Kowalski, 1999;Soder and Holden, 1999;Ingvartsen et al, 2001;Samuelson et al, 2001;Mogensen and Kristensen, 2002;Leonardi et al, 2003;Eriksson et al, 2004;Mogensen et al, 2008;Weisbjerg et al, 2008;Ordway et al, 2009;Wallsten and Martinsson, 2009;. The mean, minimum, and maximum values of DMI, DIM, NEI, and ECM are presented in Table 3.…”