RAPESEED PROTEIN AND AMINO ACID SUPPLEMENTS IN MILK REPLACERS FOR LAMBS: THEIR EFFECTS ON NUTRIENT DIGESTION AND NITROGEN RETENTION

1974 ◽  
Vol 54 (4) ◽  
pp. 611-617
Author(s):  
A. D. L. GORRILL ◽  
J. W. G. NICHOLSON ◽  
D. M. WALKER ◽  
J. D. JONES
Keyword(s):  
Amino Acid ◽  
Brassica Napus ◽  
Nitrogen Retention ◽  
Milk Proteins ◽  
Protein Concentrate ◽  
Dietary Nitrogen ◽  
Egg Protein ◽  
Whole Milk ◽  
Milk Replacers ◽  
Potential Use

Dehulled Bronowski rapeseed (Brassica napus) was either solvent-extracted and ground to a flour (RF), or heated and water- and solvent-extracted to produce a protein concentrate (RPC), for incorporation into milk replacers for lambs. When RPC replaced 0, 25 or 50% of the milk nitrogen in the diet, apparent nitrogen digestion by lambs was 93, 94 and 90%, respectively (P > 0.05), and retention of absorbed nitrogen was 74, 70 (P < 0.05) and 67% (P < 0.01), respectively. In a second experiment with diets containing 50% of the nitrogen from RF or RPC, apparent nitrogen digestion by lambs was 83 and 91% (P < 0.05), and retention of absorbed nitrogen was 59 and 63%. Apparent digestion of nitrogen was 77 and 90% (P < 0.01), and retention of absorbed nitrogen was 48 and 57% (P < 0.05), by lambs fed diets containing RF or RPC as the sole dietary nitrogen source. Supplementation of the RPC with isoleucine, lysine and phenylalanine to levels present in whole milk proteins, and methionine equal to that in egg protein, resulted in no significant improvement in apparent nitrogen digestion or retention by lambs. These results indicate a potential use for RFC to supply at least 25% of the total nitrogen in milk replacers, but only questionable potential for RF since it was not well utilized by milk-fed lambs.

GROWTH, DIGESTIBILITY AND NITROGEN RETENTION BY CALVES FED MILK REPLACERS CONTAINING MILK AND SOYBEAN PROTEINS, SUPPLEMENTED WITH METHIONINE

1969 ◽  
Vol 49 (3) ◽  
pp. 315-321 ◽  
Author(s):  
A. D. L. Gorrill ◽  
J. W. G. Nicholson
Keyword(s):  
Soybean Protein ◽  
Nitrogen Retention ◽  
Milk Replacer ◽  
Protein Concentrate ◽  
Soy Milk ◽  
Soybean Proteins ◽  
Whole Milk ◽  
Significant Difference ◽  
Soybean Protein Concentrate ◽  
Milk Replacers

Milk replacers containing zero (all-milk) or 70% of the total protein from a soybean protein concentrate (soy-milk), with or without methionine supplementation, were fed to Holstein calves. Bull calves digested 91 and 89% of the dry matter (P < 0.05), and 87 and 82% of the nitrogen (P < 0.01) supplied by the all-milk and soy-milk replacers, respectively. Nitrogen retention averaged 41% of that consumed, with no difference due to protein source. DL-methionine (0.1% of the dry replacer) did not increase calf growth or nitrogen retention. Heifer calves fed whole milk, the all-milk replacer or soy-milk replacer plus methionine, and hay and concentrates, gained 496, 550 and 526 g/day, respectively, to weaning at 7 weeks of age (treatment means not significantly different at P < 0.05). Weight gains for these three groups of heifers from 7 to 15 weeks of age were 723, 650 and 599 g/day (significant difference between whole milk and soy-milk at P < 0.05), respectively. It was concluded that the soybean protein concentrate could supply a major portion of the protein in milk replacers for rearing dairy calves.

DIGESTIBILITY OF MILK REPLACERS CONTAINING RAPESEED OIL, FED TO DAIRY CALVES UNDER A MONTH OLD

1974 ◽  
Vol 54 (3) ◽  
pp. 331-335 ◽  
Author(s):  
J. M. BELL ◽  
SANDRA C. M. ADAMS
Keyword(s):  
Amino Acids ◽  
Amino Acid ◽  
Rapeseed Oil ◽  
Dairy Calves ◽  
Milk Replacer ◽  
Protein Concentrate ◽  
Fish Protein ◽  
Brewers Yeast ◽  
Time Utilization ◽  
Milk Replacers

Sixteen calves 3–28 days of age were fed milk replacers containing 15% added fat with 0, 5, 10 or 15% rapeseed oil (27% erucic acid) substituting for lard. The protein in these replacers was entirely of milk origin. The rapeseed oil was 69% digestible, compared to 94% for the lard, and its use resulted in depression of the digestibility of protein from 80 to 66% as the portion of rapeseed oil rose from 0 to 15%. Three calves were fed a milk replacer containing 10% lard and 10% rapeseed oil, in which 60% of the protein of milk origin was replaced by protein from fish protein concentrate and from brewers’ yeast. The calves showed progressive improvement in their ability to digest amino acids in successive 2-day periods. Average amino acid digestibility increased from 72% at 4–6 days of age to 87% at 16–18 days of age, at which time utilization about equalled that expected on milk-origin diets.

EFFECTS OF MILK, FISH, AND SOYBEAN PROTEINS IN MILK REPLACEES, AND FEEDING FREQUENCY ON PERFORMANCE OF DAIRY CALVES

1972 ◽  
Vol 52 (2) ◽  
pp. 321-328 ◽  
Author(s):  
A. D. L. GORRILL ◽  
J. W. G. NICHOLSON ◽  
H. E. POWER
Keyword(s):  
Milk Protein ◽  
Soybean Protein ◽  
Milk Replacer ◽  
Protein Concentrate ◽  
Soybean Proteins ◽  
Calf Growth ◽  
Whole Milk ◽  
Protein Milk ◽  
Soybean Protein Concentrate ◽  
Milk Replacers

Two experiments were carried out with Holstein heifer calves to determine the effect of supplying a major portion of the protein in milk replacers by isopropanol-extracted protein concentrate from whole herring (FPC) or a mixture of FPC and soybean protein concentrate (SPC). Milk replacers were compared with whole milk in experiment 1. All calves were abruptly weaned when consuming 0.5 kg starter/day, or by 5 weeks of age. Calf performance was similar when the pre-weaning liquid diet was whole milk, or milk replacers containing either milk protein or 50% of the protein from FPC. Average daily gains to weaning and to 26 weeks of age for all calves were 377 and 692 g/day, respectively. Calves in experiment 2 were fed either an all-milk protein milk replacer or one containing 98% of the protein equally from FPC and SPC. Both milk replacers were fed once daily either six or seven times per week. Calf growth to weaning was lower on the FPC–SPC formula (283 vs. 364 g/day, P < 0.01), but was not significantly different (P < 0.05) to 15 weeks of age (618 vs. 643 g/day). Feeding milk replacer six vs. seven times per week had no significant effect on calf growth. Digestibility coefficients of dry matter, nitrogen, and energy were similar in bull calves fed the all-milk or FPC–SPC protein milk replacers, but retention of absorbed nitrogen was less on the latter diet (54 vs. 45%, P < 0.10).

ALKALI TREATMENT OF SOYBEAN PROTEIN CONCENTRATE IN MILK REPLACERS: ITS EFFECTS ON DIGESTION, NITROGEN RETENTION, AND GROWTH OF LAMBS

1972 ◽  
Vol 52 (4) ◽  
pp. 665-670 ◽  
Author(s):  
A. D. L. GORRILL ◽  
J. W. G. NICHOLSON
Keyword(s):  
Dry Matter ◽  
Soybean Protein ◽  
Alkali Treatment ◽  
Latin Square ◽  
Nitrogen Retention ◽  
Milk Replacer ◽  
Protein Concentrate ◽  
Complete Diet ◽  
Soybean Protein Concentrate ◽  
Milk Replacers

Alkali treatment to disperse a soybean protein concentrate (SPC) was studied in two milk replacer experiments, in which the SPC supplied 50% of the total nitrogen. In experiment 1, six lambs were used in a double 3 × 3 latin square digestion and nitrogen balance trial. The three treatments of the SPC in the milk replacer were: control (no alkali), alkali 1 (0.05 N NaOH at 40 C, neutralized with HCl after 15 min), and alkali 2 (same as 1, but neutralized after 18 hr at 5 C). The remainder of the diet ingredients were homogenized with a Polytron. Alkali treatment increased digestibility of dry matter (91, 93, and 95%, P < 0.01, on the three treatments, respectively), nitrogen, and energy, but tended to reduce the percent of absorbed nitrogen that was retained (63, 61, and 60%, P < 0.20). The control (complete diet prepared with the Polytron) and alkali 1 treatments were compared in a growth and metabolism trial in experiment 2. Growth of a total of 19 lambs from about 4 days to weaning from milk replacer at 26 days of age tended to be lower on the alkali-treated than the control SPC milk replacer (179 vs. 215 g/day, P < 0.20); however, growth to 10 weeks of age was similar for both groups and averaged 250 g/day.

NUTRIENT DIGESTION AND NITROGEN RETENTION BY LAMBS FED MILK REPLACERS CONTAINING SOLVENT-EXTRACTED OR FULL-FAT PRODUCTS FROM DIFFERENT RAPESEED CULTIVARS

1976 ◽  
Vol 56 (3) ◽  
pp. 401-408 ◽  
Author(s):  
A. D. L. GORRILL ◽  
J. R. SEOANE ◽  
J. W. G. NICHOLSON ◽  
J. D. JONES
Keyword(s):  
Erucic Acid ◽  
Dietary Protein ◽  
Dry Matter ◽  
Nutritive Value ◽  
Nitrogen Retention ◽  
Protein Concentrate ◽  
Good Source ◽  
Heated Water ◽  
Low Erucic Acid ◽  
Milk Replacers

Bronowski, Oro and Tower rapeseed were dehulled, heated, and water- and solvent-extracted to produce a protein concentrate (RPC) or only dehulled, heated and water-extracted to produce a full-fat rapeseed material (FFRS). These materials were added to lamb milk replacers to provide up to 50% of the dietary protein. RPC materials from the three cultivars were highly digestible (89% or more of dry matter) and produced similar values for nitrogen retention (60% of intake) by lambs. The FFRS materials were poorly digested (79% of dry matter or less) and generally decreased lamb performance. When the FFRS was passed through a colloid mill, digestibility values and retention of nitrogen increased to values equivalent to those obtained with RPC. Homogenization of the colloid-milled FFRS did not further improve its nutritive value for preruminant lambs. Thus, low-glucosinolate, low-erucic acid rapeseed which has been dehulled, heated, water-extracted and colloid-milled is a good source of protein and energy for lamb milk replacers.

GROWTH, DIGESTIBILITY AND NITROGEN RETENTION BY LAMBS FED LIQUID DIETS CONTAINING MILK AND SOYBEAN PROTEINS

1971 ◽  
Vol 51 (3) ◽  
pp. 663-667
Author(s):  
A. D. L. GORRILL ◽  
J. W. G. NICHOLSON ◽  
C. D. T. CAMERON
Keyword(s):  
Body Weight ◽  
Soybean Protein ◽  
Nitrogen Retention ◽  
Average Weight ◽  
Soybean Proteins ◽  
Whole Milk ◽  
Weight Gains ◽  
Soybean Protein Concentrate ◽  
Milk Replacers ◽  
Ad Libitum Feeding

Milk and soybean protein sources in liquid diets for 2- to 5-day-old lambs were compared in four experiments. Average weight gains of lambs m experiments 1 and 2 fed an all-milk protein or soy-46 milk replacer (46% of total protein from a soybean protein concentrate), with 15% homogenized lard, for about 7 weeks were 251 and 147 g/day, respectively. Digestibility of dry matter averaged 97 and 95%, and for nitrogen, 97 and 90% (P < 0.05), respectively, for lambs fed the two milk replacers. The same all-milk or soy-46 formulas, or cow’s whole milk, plus a pelleted concentrate and hay were fed to a total of 42 lambs in experiments 3 and 4. Average weight gains to weaning at 9 and 14 kg body weight in experiments 3 and 4, respectively, were 141, 132 and 163 g/day for the three treatments. Weight gains to 40 kg body weight were 185, 190 and 239 g/day. The soybean concentrate settled out of the liquid diet and therefore was not suitable for ad libitum feeding.

Modelling of the nitrogen deposition and dietary lysine requirements of Redbro broilers

2014 ◽  
Vol 54 (12) ◽  
pp. 1946 ◽  
Author(s):  
P. A. dos Santos ◽  
C. B. V. Rabello ◽  
N. K. Sakomura ◽  
E. P. da Silva ◽  
J. C. P. Dorigam ◽  
...  
Keyword(s):  
Amino Acid ◽  
Nitrogen Balance ◽  
Control Diet ◽  
Nitrogen Retention ◽  
Model Parameters ◽  
Estimation Of Parameters ◽  
Dietary Nitrogen ◽  
Nitrogen Concentrations ◽  
Limiting Amino Acid ◽  
Balance Trials

The aim of this study was to determine the coefficients of the Goettingen model for Redbro birds and estimate the digestible lysine requirements. To determine the model parameters, three nitrogen balance trials were performed in Periods I (14–28 days), II (42–56 days) and III (70–84 days), using 42 birds per trial. The birds were individually housed and subjected to six diets with increasing levels of nitrogen, with lysine as the limiting amino acid (deficient by 20% in relation to other amino acids). Dietary nitrogen concentrations were 8, 16, 24, 32, 40 and 48 g/kg. A control diet was added to confirm lysine as the first limiting amino acid. Nitrogen balance trials were divided into 5 days of adaptation and two periods of excreta collection, each one of 5 days. The response of the birds to a control diet confirmed that lysine was the first limiting amino acid. The adjustment of the exponential functions between nitrogen retention or excretion and nitrogen intake allowed estimation of parameters of the Goettingen model. The maximum potential for nitrogen retention was 3276, 2585 and 2603 mg/BWkg0.67.day, nitrogen maintenance requirement was 225, 135 and 122 mg/BWkg0.67.day and efficiency of nitrogen utilisation was 313 × 10−6, 406 × 10−6 and 415 × 10−6 in the phases of 14–28, 42–56 and 70–84 days. The digestible lysine intake for Periods I, II and III, based on 60% of the maximum potential for nitrogen retention, was 711, 989 and 1272 mg/day (1.225%, 1.137% and 1.09% of lysine in the diet for a daily feed intake of 58, 87and 117 g/day), respectively.

EFFECTS OF VARIOUS HEAT AND pH TREATMENTS ON DIGESTIBILITY OF PROTEIN IN PEA PROTEIN CONCENTRATE (PISUM SATIVUM)

1976 ◽  
Vol 56 (3) ◽  
pp. 559-566 ◽  
Author(s):  
C. CHOW ◽  
J. M. BELL
Keyword(s):  
Amino Acid Content ◽  
Milk Proteins ◽  
In Vitro Digestion ◽  
Protein Concentrate ◽  
Pepsin Activity ◽  
Pea Protein ◽  
Alkali Hydrolysis ◽  
Milk Replacers ◽  
Hydrolysis Of

Pea protein concentrate (PPC) was subjected to various cooking and acid or alkali treatments in order to improve the digestibility of pea protein for use in calf milk replacers. Treatment effects were assessed by in vitro digestion with rennin, pepsin and calf abomasal fluids. Oven heating at 95–246 C for 5 min to 15 h or steam heating at 1.06 kg/cm2 for 4 h failed to improve digestibility. Treatment of PPC in an aqueous medium at pH values from 2 to 12 for 5 h at 37 C resulted in higher digestibility. A pH of 2.0 or 10.6 was most effective. Acid or alkali hydrolysis of PPC at 110 C for 4–5 h increased digestibility, but adversely affected amino acid content. Rennin was consistently less effective than pepsin or abomasal contents in digesting PPC. The pH of abomasal contents from young calves fed milk replacers may be too high for effective pepsin activity. These factors could account for the low digestibility of non-milk proteins by calves under 2 wk of age.

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