Effect of breed, gender, housing system and dietary crude protein content on performance of finishing beef cattle fed maize-silage-based diets

AbstractThis study investigated the effects of 100 g/kg increments of crude protein (approx. 250 (P25) to 550 (P55) g/kg of crude protein) in paired iso-energetic diets on the growth performance of the juvenile Australian short-finned eel (1·83 (s.e. 0·01) g average wet weight). The highest growth response was obtained with treatment P45 followed by P35, P55 and P25. It appeared that food efficiency ratio (FER) increased with increasing crude protein content in low energy diets (treatments P25 and P35). However, 100 g/kg increase in dietary crude protein content (from 450 to 550 kg crude protein per kg diet) in high energy diets resulted in lower FER for treatment P55 than for the treatment P45. The protein efficiency ratio (PER, %) was higher in low protein:low energy diets (treatments P25 and P35) than that of high protein:high energy diets (treatments P45 and P55). The protein productive values (PPV, %) for treatments followed a similar trend to PER in this experiment. The lowest PPV was obtained by the treatment P55 and it was significantly different from that of the other three treatments. A proportional increase in dietary crude protein content in paired iso-energetic diets did not significantly change the whole body protein content. However, a small increase in whole body protein content with increasing dietary crude protein in each group was detected. In conclusion, the present study showed protein sparing effects of lipids and carbohydrates in the diets of the short-finned eel. Further studies specifically investigating the effects of dietary carbohydrate to lipid ratios at different protein levels would improve diet formulation and reduce nutrient impact in intensive recirculation systems.

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Effect of age and dietary crude protein content on the apparent ileal calcium digestibility of limestone in broiler chickens

Animal Feed Science and Technology ◽

10.1016/j.anifeedsci.2020.114468 ◽

2020 ◽

Vol 263 ◽

pp. 114468 ◽

Cited By ~ 1

Author(s):

L.S. David ◽

M.R. Abdollahi ◽

M.R. Bedford ◽

V. Ravindran

Keyword(s):

Protein Content ◽

Broiler Chickens ◽

Crude Protein ◽

Crude Protein Content ◽

Dietary Crude Protein ◽

Effect Of Age

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A note on the implantation of intensively-fed beef cattle with hexoestrol

Animal Science ◽

10.1017/s0003356100027069 ◽

1969 ◽

Vol 11 (3) ◽

pp. 419-422 ◽

Cited By ~ 6

Author(s):

A. Macdearmid ◽

T. R. Preston

Keyword(s):

Growth Rate ◽

Beef Cattle ◽

Protein Content ◽

Conversion Efficiency ◽

Crude Protein ◽

Fat Content ◽

Crude Protein Content ◽

Feed Conversion ◽

Feed Conversion Efficiency ◽

Single Implant

SUMMARYIn the first of two experiments, steers which received a single implant of 60 mg hexoestrol grew 24% faster than non-implanted controls and 7% faster than steers given 30 mg. The growth rate of the steers given a single implant of 60 mg did not differ significantly from that of animals implanted twice with 30 mg or 5 times with 15 mg. In the second experiment, steers given 60 mg grew 23% faster than controls and their feed conversion efficiency was 13% better; the hexoestrol treatment resulted in a saving of 131 kg feed per animal. The tenth-rib joints of steers given 60 mg had a higher crude-protein content and lower fat content than those from non-implanted animals.

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Variations of Ammonia Emissions from Cattle Operations: Effects of Air Temperature and Dietary Crude Protein Content

Transactions of the ASABE ◽

10.13031/trans.11797 ◽

2017 ◽

Vol 60 (1) ◽

pp. 215-227 ◽

Cited By ~ 1

Keyword(s):

Protein Content ◽

Air Temperature ◽

Crude Protein ◽

Ammonia Emissions ◽

Crude Protein Content ◽

Dietary Crude Protein

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Ammonia treated whole barley and wheat for beef cattle

Proceedings of the British Society of Animal Production (1972) ◽

10.1017/s0308229600026180 ◽

1994 ◽

Vol 1994 ◽

pp. 71-71

Author(s):

M Lewisl ◽

B G Lowmanl ◽

M Ford

Keyword(s):

Beef Cattle ◽

Protein Content ◽

Crude Protein ◽

Crude Protein Content ◽

Ammonia Treatment ◽

Digestive Disorders ◽

Voluntary Intake ◽

Pass Through ◽

The Uk ◽

Sodium Hydroxide Treatment

Barley and wheat require processing for feeding to cattle otherwise large amounts of whole grain pass through the animals undigested. Processing methods can be mechanical, such as rolling or grinding, or chemical, such as sodium hydroxide treatment - a method which is in common use on dairy farms in the UK. Although ammonia treatment of cereal straws is widely practiced on farms - where it results in an improvement in straw digestibility, voluntary intake and crude protein content, the use of ammonia for treating cereal grains has not been investigated in the UK. Ammonia treatment of moist grain has the potential to (1) preserve it, thus avoiding drying or preservation costs, (2) make investment in grinding/rolling equipment unnecessary, (3) increase its crude protein content and (4) make it a safer feed compared with mechanically processed grain which frequently causes digestive disorders when fed in large amounts. The aim of the current study was to investigate the use of ammonia-treated barley and wheat, fed whole, in diets for beef cattle.

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