Prediction of the digestible crude protein and protein digestibility of feed ingredients for rabbits from chemical analysis

ABSTRACTA urfia-formaldehyde-molasses complex appeared to be a promising slow ammonia-releasing urea derivative in in vitro studies. It was compared with urea-molasses mixtures as a non-protein nitrogen supplement to an ad libitum wheat chaff ration for steers. The significantly lower (P < 0·01) crude protein digestibility and intake of digestible crude protein, and the non-significantly lower nitrogen retention on the urea-formaldehyde-molasses complex ration revealed the superiority of simple urea-molasses mixtures as a non-protein nitrogen supplement.

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EFFECTS OF INCREASING THE ENERGY VALUE OF A WHOLE MILK DIET FOR CALVES. I. NUTRIENT DIGESTIBILITY AND NITROGEN RETENTION

Canadian Journal of Animal Science ◽

10.4141/cjas73-047 ◽

1973 ◽

Vol 53 (2) ◽

pp. 307-316 ◽

Cited By ~ 11

Author(s):

G. A. LODGE ◽

E. E. LISTER

Keyword(s):

Crude Protein ◽

Dry Matter ◽

Nitrogen Retention ◽

Protein Digestibility ◽

Nutrient Digestibility ◽

Severe Diarrhea ◽

Whole Milk ◽

Gross Energy ◽

Digestible Crude Protein ◽

Holstein Calves

In each of four metabolism trials using male Holstein calves, the biological value (BV) of whole milk protein was improved by increasing the energy:protein ratio through addition of glucose or butterfat. Cow’s milk, which provided 21.7–23.8 kcal digestible energy (DE)/g digestible crude protein (DCP) had a BV of 73–78, whereas supplementation with glucose to provide 28 kcal DE/g DCP increased the BV to 84–86. Higher levels of glucose providing 31–32 kcal DE/g DCP tended to further elevate the BV to 87–89 but some diarrhea occurred in younger calves. Attempts to provide larger quantities of energy by increasing the amount of glucose resulted in severe diarrhea and the consistent detection of glucose in the feces. Except where the diarrhea was severe, digestibilities of dry matter and gross energy were not affected by increasing quantities of glucose in the diet. Protein digestibility, however, was depressed in each metabolism trial when higher levels (8–10% glucose monohydrate) were added to whole milk.

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The error associated with the prediction of digestible protein contents of fish diets from tabulated values

Czech Journal of Animal Science ◽

10.17221/65/2009-cjas ◽

2009 ◽

Vol 54 (No. 11) ◽

pp. 498-509 ◽

Cited By ~ 1

Author(s):

J. Sales

Keyword(s):

Rainbow Trout ◽

Crude Protein ◽

Protein Digestibility ◽

Fish Nutrition ◽

Feed Ingredients ◽

Nutrient Contents ◽

Dietary Crude Protein ◽

Fish Diets ◽

Digestible Protein ◽

Predicted Values

Numerous species available for culture, and lengthy, tedious and demanding digestibility experiments necessitate the use of tabulated values to calculate the apparent digestible nutrient contents of compound fish diets. The error associated with the above practice was evaluated in the present study with the use of apparent protein digestibility coefficients (APDCs) and dietary crude protein (CP) contents obtained in independent studies on fish nutrition. Prediction of APDCs of 21 compound diets evaluated in 18 studies with rainbow trout (<I>Oncorhynchus mykiss</I>), by using APDCs of 27 individual feed ingredients determined for this fish species, presented a mean prediction error (MPE) of 0.0489 between observed and predicted values. However, the above APDCs resulted in an overestimation of 7.86% (MPE = 0.0899) for APDCs of compound diets (<I>n</I> = 15) tested with 7 species other than rainbow trout. The CP contents of the above compound diets were overestimated with MPE’s of 0.3029 and 0.3200 for rainbow trout and other species, respectively, when using CP contents of individual feed ingredients as predictors. This eliminates the use of tabulated values to calculate apparent digestible protein contents of compound fish diets, except if databases are regularly updated with CP values for feed ingredients used.

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Protein digestibility in sheep and cattle in north-western Australia

Australian Journal of Experimental Agriculture ◽

10.1071/ea9680419 ◽

1968 ◽

Vol 8 (33) ◽

pp. 419 ◽

Cited By ~ 5

Author(s):

DW Robinson ◽

GA Stewart

Keyword(s):

Western Australia ◽

Crude Protein ◽

Protein Digestibility ◽

Research Station ◽

Digestible Crude Protein ◽

The Difference ◽

Protein Rich ◽

High Degree ◽

The Relationship ◽

North Western

Three experiments were conducted at Kimberley Research Station, Western Australia, one with local Shorthorn cattle and two with Peppin Merino sheep from the Abydos region of Western Australia, to study the protein digestibility of various combinations of low-quality roughage and protein-rich concentrates. The relationship between the crude protein and digestible crude protein content of the feed was for cattle : % DCP = 0.832% CP - 1.58 and for sheep : % DCP = 0.865% CP - 2.21 indicating a higher ability to digest protein compared with previous values in the literature for cattle and sheep. It is suggested that the difference may be due to a high degree of adaptation to semi-arid conditions of local sheep and cattle in north-western Australia.

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Energy values in pig nutrition:II. The prediction of energy values from dietary chemical analysis

The Journal of Agricultural Science ◽

10.1017/s0021859600071835 ◽

1975 ◽

Vol 84 (1) ◽

pp. 19-27 ◽

Cited By ~ 22

Author(s):

D. J. Morgan ◽

D. J. A. Cole ◽

D. Lewis

Keyword(s):

Chemical Analysis ◽

Crude Protein ◽

Correlation Coefficients ◽

Metabolizable Energy ◽

Ether Extract ◽

Crude Fibre ◽

Dietary Analysis ◽

Nitrogen Free Extract ◽

Acid Detergent Fibre ◽

Digestible Crude Protein

SUMMARYEighteen individual feedstuffs and 19 mixed diets were used in a study attempted to relate determined energy values to various chemically determined measures. For cereals the level of fibre could be used to predict digestible and metabolizable energy (DE and ME). In the case of DE the relationships with crude fibre and modified acid detergent fibre (MADF) based on 14 feeds were:DE (kcal/kg D.M.) = 4179–86 MADF (%): r =–0·96; P < 0·01,DE (kcal/kg D.M.) = 4228–140 x crude fibre (%): r =–0·97; P < 0·01.For all feeds the following equations gave the best prediction of energy values from dietary analysis (on the basis of correlation coefficients and residual standard deviations):DE (kcal/kg D.M.) = 109·9 x crude protein (%) + 149·3 x acid ether extract (%) + 90·1 x nitrogen-free extract (%)–5030: R = 0·95; P < 0.01.ME (kcal/kg D.M.) = 99·5 x crude protein (%) + 144·7 x acid ether extract (%) + 87·8 x nitrogen-free extract (%)–4795: R = 0·94; P < 0·01.Digestible nutrients were closely related to DE and ME, e.g.DE (kcal/kg D.M.) = 52·9 x digestible crude protein (%) + 108·3 x digestible ether extract (%) + 39·4 x digestible crude fibre (%) + 39·9 x digestible nitrogen-free extract (%) + 183·7: R = 0·99; P < 0·01.

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Nutritive value of Pennisetum clandestinum based pastures in a sub-tropical environment

Australian Journal of Experimental Agriculture ◽

10.1071/ea9710173 ◽

1971 ◽

Vol 11 (49) ◽

pp. 173 ◽

Cited By ~ 4

Author(s):

H Jeffery

Keyword(s):

Crude Protein ◽

Dry Matter ◽

Nutritive Value ◽

Protein Digestibility ◽

Mean Values ◽

Pennisetum Clandestinum ◽

Nitrogenous Fertilizer ◽

Feeding Experiments ◽

Digestible Crude Protein ◽

Range Of Values

The results of 45 sheep feeding experiments with kikuyu (Pennisetum clandestinum) based pastures are summarized. Mean values and the range of values for crude protein and normal acid fibre contents, dry matter, organic matter, and crude protein digestibilities and intake per kg liveweight0.75 are presented for the following pasture types : kikuyu, kikuyu plus nitrogenous fertilizer, Glycine wightii/kikuyu, Desmodium uncinatum/kikuyu and Vicia sativa/kikuyu. The relation between crude protein (CP) and crude protein digestibility, and CP and digestible crude protein for these five pasture types was established. Significant differences between pasture types are shown to exist and the importance of these differences discussed. A possible reason for differences in the relations found by previous workers is discussed.

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DIGESTIBILITY AND FEEDING VALUE OF HULLESS BARLEY FOR PIGS

Canadian Journal of Animal Science ◽

10.4141/cjas76-062 ◽

1976 ◽

Vol 56 (3) ◽

pp. 505-511 ◽

Cited By ~ 21

Author(s):

K. G. MITCHALL ◽

J. M. BELL ◽

F. W. SOSULSKI

Keyword(s):

Crude Protein ◽

Average Daily Gain ◽

Protein Digestibility ◽

Feed Conversion ◽

Feeding Trial ◽

Hulless Barley ◽

Weight Range ◽

Feeding Value ◽

Digestible Crude Protein ◽

Daily Gain

A feeding trial and two digestibility trials were conducted to evaluate two isogenic lines of regular (covered) and hulless barley, cvs. Compana and Vantage, compared also with wheat. Eight pigs (4♀, 4♂) were fed each diet over the weight range 22–50 kg. Half of the pigs, randomly selected within sex and diet groups, were used in the digestibility trials, employing chromic oxide markers. The second digestibility trial involved different pigs from the first and a new source of hulless barley. The average daily gain was 0.62 kg and there were no significant differences between rations. Likewise, feed intakes and efficiencies of feed conversion revealed no treatment differences. The digestibility of protein in hulless barley was lower than in regular barley (70 vs. 73% in one trial, 74.8 vs. 79.3% in another) and both types of barley were lower in protein digestibility than wheat (81.4%). Energy digestibility was highest in hulless barleys (77.3 vs. 73.2; 81.8 vs. 77.1%). Hulless barley contained about 5% more digestible energy than regular barley (3,295 vs. 3,133 kcal/kg) and the same digestible crude protein (12.85 vs. 12.90%).

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Studies On Browse Plants in Ghana II. Digestibility, (d) Digestibility Of Grewia Carpinifolia From The Accra Plains, Using Local Cattle As Experimental Animals

Experimental Agriculture ◽

10.1017/s0014479700100067 ◽

1966 ◽

Vol 2 (2) ◽

pp. 113-117

Author(s):

G. L. Mabey ◽

R. Rose Innes

Keyword(s):

Organic Matter ◽

Crude Protein ◽

Dry Matter ◽

Ether Extract ◽

Crude Fibre ◽

Experimental Animals ◽

Nutritive Values ◽

Digestible Crude Protein ◽

Accra Plains

SummaryDigestibility of the palatable indigenous shrub Grewia carpinifolia was investigated. Digestion coefficients (%) were—organic matter 70, dry matter 70, crude protein 78, crude fibre 54, nitrogenfree extract 81, ether extract 13 and ash 52. Calculated nutritive values were—starch equivalent 27.3 and digestible crude protein 5.0, giving a nutritive ratio of about 1 : 5. The material used was moderately young.

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Zinc and/or Selenium Enriched Spirulina as Antioxidants in Growing Rabbit Diets to Alleviate the Deleterious Impacts of Heat Stress during Summer Season

Animals ◽

10.3390/ani11030756 ◽

2021 ◽

Vol 11 (3) ◽

pp. 756

Author(s):

Fawzia Hassan ◽

Samia Mobarez ◽

Manal Mohamed ◽

Youssef Attia ◽

Aml Mekawy ◽

...

Keyword(s):

Growth Performance ◽

Antioxidant Status ◽

Crude Protein ◽

Ldl Cholesterol ◽

White Male ◽

Protein Digestibility ◽

Nutrient Digestibility ◽

Plasma Total Cholesterol ◽

Low Concentrations ◽

Diet Control

Effects of dietary supplemental zinc and/ or selenium enriched spirulina (Zn-Sp, Se-Sp and Zn-Se-Sp, respectively) as antioxidants on growth performance, nutrient digestibility, plasma biochemicals and antioxidant status of growing rabbits under summer conditions were evaluated. A total of 160 New Zealand White male rabbits at six-weeks-old were randomly assigned to four groups. The first group received untreated diet (control). The other groups received diet supplemented with 100 mg Zn-Sp/kg diet, 0.5 mg Se-Sp/kg diet or 100 mg Zn-Sp+ 0.5 mg Se-Sp, respectively. The findings showed that the supplemented diets enhanced growth performance of rabbits at marketing. Rabbits fed Zn-Sp exhibited high dry and organic matter digestibilities while those fed Zn-Sp and Zn-Se-Sp diet supplemented achieved high crude protein digestibility. Rabbits fed diet supplemented with Zn-Se-Sp gave the highest hot carcass weight when competed with their counterparts. Zn-Sp and Zn-Se-Sp supplemented diets tended to promote dressing percentage. Low concentrations of plasma total cholesterol, LDL-cholesterol and VLDL-cholesterol were recorded by Se-Sp and Zn-Se-Sp groups. Rabbits fed Se-Sp, Zn-Se-Sp had the greatest HDL, plasma TAC and catalase and the lowest TBARs. Conclusively, dietary supplementation of 100 mg Zn-Sp, 0.5 mg Se-Sp or their combination could improve growth performance, nutrients digestibility and antioxidant status of heat stressed growing rabbits.

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