Silage and milk production. A comparision between barley and groundnut cake as supplements to silage of high digestibility

1979

Self Cite

Grass silage made in May from S24 perennial ryegrass was offered ad libitum to twelve Ayrshire cows in a 12-week feeding experiment. The silage had a DM concentration of 217 g kg ~', contained 147 g crude protein per kg DM and had a D-value of 64-6. In addition each cow consumed 1 kg hay per d plus concentrate supplements of dried sugar-beet pulp with (A) soya bean meal, (B) 'Pruteen', a single-cell protein (C) groundnut cake. The three concentrate supplements each contained 250 g crude protein per kg DM and were offered at the rate of 2-9 kg per 10 kg milk. The daily intakes of silage DM were 8-38, 7 94 and 7 49 kg on treatments A, B and C, respectively, with the extreme values being significantly different. The mean daily yields of milk on treatments A and B were both 16 2 kg per cow, and were significantly higher than the yield of 15 2 kg per cow on treatment C. The fat and lactose contents of the milk on the three treatments were not significantly different, but the CP content on treatment C was significantly lower than that on the other treatments. It is concluded that soya bean meal and 'Pruteen' were superior to groundnut cake as a protein supplement in a silage-based ration.

Section: Discussionsupporting

confidence: 82%

Section: Milk Yield Composition and Liveweightcontrasting

confidence: 66%

Section: Introductionmentioning

confidence: 97%

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Silage and milk production: a comparison between soya, groundnut and single‐cell protein as silage supplements

1979

Self Cite

“…There were, however, no differences between the milk yields and the composition of ihe milk on the two concentrate treatments. This result is in marked contrast to the difference found between barley and groundnut given to dairy cows with grass silage (Castle and Watson, 1976). Part of the explanation may be due to the differences in the amount of non-protein N (NPN) in the basic foods.…”

Section: Discussioncontrasting

confidence: 48%

A comparison between barley and groundnut as supplements for dairy cows at pasture

Leaver

1979

Self Cite

In two 12‐week grazing experiments using twelve and eighteen spring‐calved cows in 1976 and 1977 respectively, the effects of feeding either a barley or a groundnut concentrate supplement were investigated. The mean yield of herbage DM on offer was 2330 and 2030 kg ha‐1, with crude protein concentrations of 192 and 193 g per kg DM in 1976 and 1977 respectively. Grazed herbage was the sole feed in the control treatment. In the other two treatments the herbage was supplemented with 3 kg per cow per d of a concentrate containing either 82·2% barley or groundnut with mean crude protein concentrations of 109 and 409 g per kg DM respectively. Similar results were obtained in both experiments with average daily milk yields of 18·3, 19·8 and 19·9 kg per cow on the control, barley and groundnut treatments respectively. The supplements had no significant effects on either milk composition or liveweight change. It is concluded, that with an ample supply of herbage of high crude protein concentration, a supplement of groundnut had no advantages over one of barley.

“…The early silage cut on 25 May was of high quality and had a D-value of 71 -2 (Table 1), which equals the highest value achieved in previous silage-feeding experiments at this Institute (Castle and Watson, 1975;1976;Castle et al, 1977 a;b). The DM intake of the early-cut silage in the present experiment was equivalent to 2-58% of live weight and gave a mean daily milk yield of 160 kg per cow when it was the sole constituent in the ration.…”

Section: Discussionmentioning

confidence: 77%

Silage and milk production: a comparison between three grass silages of different digestibilities

Retter

1980

Self Cite

Three first-harvest grass silages made from S23 perennial ryegrass cut on 25 May, 13 June and 25 June, and termed early, medium and late silages respectively, were compared in a 16-week feeding experiment with fourteen Ayrshire cows. The early, medium and late silages had Dvalues of 712, 650 and 62 5 respectively. The early silage was offered alone, whereas the medium and late silages were supplemented with a concentrate containing 208 g crude protein per kg DM at rates of 2, 3 and 4 kg per 10 kg milk. Silage DM intake was 12-8 kg per cow per d on the early silage treatment, and decreased progressively as concentrate intake increased on the other silage treatments. The mean daily milk yields were 16 0 kg per cow in the early silage treatment, 17-0, 18-4 and 20-4 kg per cow in the medium silage treatments, and 16 8, 181 and 20 2 kg per cow in the late silage treatments on the 2-, 3-and 4-kg concentrate treatments respectively. Fat concentration in the milk was not affected significantly by treatment, whereas the CP and SNF concentrations increased progressively and significantly as supplementary feeding increased. From the relationship between milk yield and concentrate intake it was calculated that the medium and late silages required a daily concentrate supplement of 21 kg DM per cow to give the same daily milk yields as the early silage.