Maize silage with a non‐protein nitrogen additive as feed for autumn‐calving cows

Phipps, R. H.; Cramp, D. G.

doi:10.1111/j.1365-2494.1978.tb00792.x

Cited by 4 publications

(1 citation statement)

References 12 publications

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“…Mineral levels in the maize silage used were in general agreement with reported values (Johnson & McClure 1968;National Research Council 1976;Phipps & Cramp 1978;Ensminger & Olentine 1978) except for particularly low levels ofNa, similar to those reported by Thom (1977) for maize grown on an adjacent area, and levels of Mg and P near to the lower limits of reported values.…”

Section: Discussionsupporting

confidence: 78%

Effects of supplements of urea and minerals on steers fed maize silage

Reardon

1980

New Zealand Journal of Experimental Agriculture

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A mineral mixture (Ca, P, Na, Mg, S, Cu, Co, Zn, Mn, I, Fe) and urea (10 g/kg silage DM) were added separately and in combination to sole diets of maize silage (33% DM) fed to 16-month-old beef steers initially weighing 303 kg. Urea increased silage DM intake from 7.3 to 8.1 kg/day and increased carcass gain from 0.20 to 0.48 kg/day. Minerals increased silage DM intake from 7.1 to 8.3 kg/day and increased carcass gain from 0.22 to 0.46 kg/day with an indication (P < 0.1) of a positive interaction between urea and minerals on both intake and carcass gain. There was a significant interaction on live-weight gain with urea improving gain from 0.77 to 1.43 kg/day in the presence of and from 0.37 to 0.80 kg/day in the absence of, supplementary minerals. '

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Section: Discussionsupporting

confidence: 78%

Effects of supplements of urea and minerals on steers fed maize silage

Reardon

1980

New Zealand Journal of Experimental Agriculture

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Protein studies on maize silage as a basal ration for dairy cows

Phipps¹,

Weller²,

Smith³

et al. 1981

J. Agric. Sci.

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In Expt 1 40 lactating British Friesians, 20 cows and 20 heifers, were used to study the effect of crude protein (CP) content of the whole ration on milk yield, milk composition and live-weight change when maize silage was fed as the basal ration. There were four treatments with five cows and five heifers on each. During lactation weeks 4-12 the cows on treatments 1, 2, 3 and 4 all received 7 kg maize silage dry matter (D.M.) plus 8 kg D.M./day of a concentrate containing either 14, 18, 22 or 24% CP, respectively; heifers received 1 kg/day less of both silage and concentrate. This produced whole-ration CP contents of 11-7, 13-9, 16-0 and 17-1%. In the subsequent lactation weeks 13-20 silage feeding was increased to 9 kg D.M./cow/day and concentrate feeding decreased to 5 kg D.M./cow/day. Heifers again received 1 kg/day less of both silage and concentrate. This decreased whole-ration CP contents to 10-5, 11-7, 12-9 and 13-4%.During lactation weeks 4-12 and 13-20, with the exception of milk fat content in weeks 13-20, there were significant linear effects of whole-ration CP content on milk yield, milk fat, protein, lactose and total solids. There were no significant curvilinear relationships. Thus, despite the fact that the highest numerical values were generally recorded for the animals on treatment 3, the results indicate that a whole-ration CP content of at least 17-1 and 13-4% are required in early and mid-lactation respectively.In Expt 2 the loss of D.M., acid-detergent fibre and nitrogen from maize silage suspended in nylon bags in the rumen was measured. Compared with feeding either a low or high protein supplement, losses were greater for silage fed alone. If it is accepted that nitrogen loss can be approximated to protein degradability, then the value for maize silage was between 0-6 and 0-7. Using the same technique in Expt 3, comparable nitrogen losses for fish meal, decorticated groundnut meal and soya-bean meal were 0-3, 0-9 and 0-9, respectively, after 24 h incubation.

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Milk yields from feeding maize silage and meat-and-bone meal to Friesian cows grazing a tropical grass and legume pasture

Davison¹,

Marschke²,

Brown³

1982

Aust. J. Exp. Agric.

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Twenty Friesian cows in mid-lactation were used in a 2x2 factorial experiment to determine the responses in milk yield, milk composition and liveweight to maize silage supplement (3 kg dry matter/cow.d, or free access during the day) with or without a meat-and-bone meal supplement (5 silage: 1 meat-and-bone meal, on a dry matter basis). Cows grazed green panic (Panicum maximum var. trichoglume) and glycine (Neonotonia wightii cv. Tinaroo) mixed pastures at 2.5 cowslha. Experimental treatments were maintained for eight weeks after which cows grazed as one group on unsupplemented pasture for a further eight weeks. Milk yields averaged 14.7 and 16.0 kg/cow.d for the low and high silage levels (P < 0.01), and 15.8 and 14.8 kg/cow.d with and without meat-and-bone meal (P < 0.05). There was a residual effect of 1.2 kg milk/cow.d (P < 0.05) for eight weeks after the experimental period from feeding silage at the high level. Feeding meat-and-bone meal reduced milk fat percentage from 3.61 to 3.30% (P< 0.05). Protein yield and the short-chain fatty acid (C4-C16) content of milk fat were increased by increasing the level of intake of silage (P < 0.01), while feeding meat-and-bone meal increased protein yield (P < 0.05), but decreased the short-chain fatty acid content of milk fat (P < 0.05). Cows lost an average of 15.2 kg liveweight at the low silage level and gained 6.7 kg at the high silage level (P< 0.01) over the eight weeks of experimental feeding.

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Maize silage with a non‐protein nitrogen additive as feed for autumn‐calving cows

Cited by 4 publications

References 12 publications

Effects of supplements of urea and minerals on steers fed maize silage

Effects of supplements of urea and minerals on steers fed maize silage

Protein studies on maize silage as a basal ration for dairy cows

Milk yields from feeding maize silage and meat-and-bone meal to Friesian cows grazing a tropical grass and legume pasture

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