The apparent digestibility of crude protein by non-ruminants and ruminants

1958 ◽  
Vol 51 (3) ◽  
pp. 289-293 ◽  
Author(s):  
J. Glover ◽  
D. W. Duthie
Keyword(s):  
Crude Protein ◽  
The Other ◽  
Fibre Content ◽  
Apparent Digestibility ◽  
Crude Protein Content ◽  
Normal Range ◽  
Crude Fibre ◽  
Apparent Digestibility Coefficient ◽  
The Relationship ◽  
Crude Fibre Content

The apparent digestibility of crude protein by the non-ruminants, pigs, horses, rats, man and the rabbit, is shown to be related to the crude protein content of the feed, and the form of the relationship is similar to that for ruminants. With non-ruminants the apparent digestibility of crude protein is markedly depressed by the crude fibre content of the feed, whereas with ruminants the depression is only slight. The relevant equations show that pigs are much more sensitive to crude fibre than horses and rabbits, and both the latter react more markedly to crude fibre than do the ruminants.Despite the apparently significant differences between the equations for the ruminant and nonruminant herbivores, it is shown that over the normal range of crude protein and crude fibre content in feedingstuffs suitable for herbivores, the apparent digestibility coefficient of crude protein is similar for all. In other words, despite different abilities to cope with crude fibre, the herbivores as a class digest crude protein in normal feeds to much the same extent. On the other hand, the pig, an omnivore, is shown to be very markedly affected by the crude fibre content of such feeds.

The apparent digestibility of crude protein by the ruminant: IV. The effect of crude fibre

1957 ◽  
Vol 49 (1) ◽  
pp. 78-80 ◽  
Author(s):  
J. Glover ◽  
M. H. French
Keyword(s):  
Protein Content ◽  
General Equation ◽  
Crude Protein ◽  
Dry Matter ◽  
The Other ◽  
Apparent Digestibility ◽  
Crude Protein Content ◽  
Crude Fibre ◽  
Modified Equation

The role of crude fibre in modifying the general equation relating the digestibility coefficient of crude protein to the percentage of crude protein in the dry matter of a feed is described.It is shown that for normal average food-stuffs the effect is slight and that for all practical routine purposes the original equation will provide satisfactory estimates of the digestibility coefficient when only the crude-protein content of the dry feed is known.On the other hand, when exceptional feeds are encountered, particularly those in which the crudefibre/crude-protein relationship is abnormal, then more accurate estimates of the digestibility coefficient of crude protein can be obtained from the modified equation which is described above.

The composition and nutritive value of seeds hays

1944 ◽  
Vol 34 (2) ◽  
pp. 88-92 ◽  
Author(s):  
W. S. Ferguson ◽  
S. J. Watson
Keyword(s):  
Protein Content ◽  
Crude Protein ◽  
Nutritive Value ◽  
Fibre Content ◽  
First Year ◽  
Crude Protein Content ◽  
Crude Fibre ◽  
Two Samples ◽  
Crude Fibre Content ◽  
Clover Content

The examination of 108 first year seeds hays showed the average crude protein content to be 9·0 ― and the average crude fibre content 25·7 ―. The crude protein content varied from 5·0 to 13·5 ― and was directly associated with the clover content.Figures obtained on hays cut in the second and third years of the ley suggest that the protein content falls, and the crude fibre content rises, with increasing age of ley.The composition and digestibility of twenty first year hays were determined and the average figures quoted for hays of high, medium and low clover content. The starch equivalent values of these hays were high and moderately constant, varying from 33·3 to 41·2, average 36·8. The protein equivalent values varied from 1·8 to 8·4 ―, average 5·1 ―.The composition and digestibility of four samples of second year seeds hay, two samples of third year hay, one sample of second cut hay in its first year and one sample of lucerne and cocksfoot hay were also determined.

Silage as a feed for pregnant ewes

1967 ◽  
Vol 9 (3) ◽  
pp. 399-408 ◽  
Author(s):  
J. M. Forbes ◽  
J. K. S. Rees ◽  
T. G. Boaz
Keyword(s):  
Crude Protein ◽  
Live Weight ◽  
Low Ph ◽  
The Other ◽  
Unit Weight ◽  
Crude Protein Content ◽  
Crude Fibre ◽  
Fourth Group ◽  
Voluntary Intake ◽  
Crude Fibre Content

1. Four experiments are described in which silages or kale were given to groups of ewes in the later stages of pregnancy and their voluntary intake recorded. A concentrate supplement was given in the last few weeks of pregnancy in each experiment. In experiments 1, 3 and 4 the ewes were housed in a semi-covered yard.2. In the first experiment, three groups of 10 Scottish Halfbred ewes were offered one of three silages. A fourth group was offered all three in equal amounts. The silage with a low DM content, low crude-protein content, low pH and high crude-fibre content was eaten in smaller quantities than the other two silages. The ewes fed on this poor silage gained less weight during the latter half of pregnancy.3. In a second experiment four groups of 15 ewes were offered either silage or kale and housed in a Dutch barn or left in a small paddock. There was no difference between the results from the two silage-fed groups in any respect. The ewes offered kale outside ate less than those offered it inside; they gained less weight and produced lighter lambs.4. There were two groups of 13 ewes in experiment 3a, one group lambing 5 weeks before the other. Both were fed on the sanie silage; intake was higher in the late lambing group but there was no difference in lamb birth weights.5. Experiment 3 was repeated with 15 ewes per group; the silage was of much poorer quality, intake being low and the ewes gaining very little weight. Lamb birth weights and growth rates were low.6. Groups of 15 Scottish Halfbred (90 kg. live-weight) and 15 Speckle-faced Welsh (45 kg.) ewes were fed on yet another silage. The Specklefaced ewes ate more silage DM per unit weight than did the Halfbred ewes and gained in weight, whereas the Halfbreds did not gain.7. In all experiments there was a decline in silage intake in the last few weeks of pregnancy. This decline did not always coincide with the start of concentrate feeding.8. The results are discussed and comparisons made between experiments. Suggestions are made for the feeding and management of ewes fed on silage, including the recommendation that a silage for pregnant ewes should have at least 20% DM and 14% crude protein in the DM, but not more than 32% crude fibre in the DM.

scholarly journals Development of Buckwheat Cookies Supplemented with Wheat Flour

2017 ◽  
Vol 60 (1) ◽  
pp. 27-35
Author(s):  
Nisar Hussain ◽  
Javid Ullah ◽  
Ehsan Elahi ◽  
Sajjad Ahmad ◽  
Muhammad Zakaria ◽  
...  
Keyword(s):  
Wheat Flour ◽  
Crude Protein ◽  
Fibre Content ◽  
Composite Flour ◽  
Crude Fibre ◽  
Mineral Contents ◽  
Overall Acceptability ◽  
C 50 ◽  
Crude Fibre Content ◽  
Buckwheat Flour

The present study was conducted to develop buckwheat cookies supplemented with wheat flour.Buckwheat and wheat flour were examined for their proximate composition. Buckwheat flour contained11.6% moisture, 15.79% crude protein, 1.81% crude fat, 1.83% ash, 0.70% crude fibre content and 68.27%NFE, while wheat flour contained moisture content 13.12%, crude fibre content 1.93%, crude fat 1.42%,crude protein content 12.53%, ash content 1.57% and 69.43% NFE, respectively. Wheat flour was incor-porated into buckwheat flour at 10, 20, 30, 40 and 50% ratio to make composite flour and the developedcookies were analysed for quality evaluation. Supplementation of wheat flour significantly influenced theproximate and mineral composition of buckwheat flour based cookies. Moisture contents, crude fibrecontents and NFE (Nitrogen Free Extract) increased, whereas crude fat, crude protein and ash contentsdecreased. Mineral contents (Fe, Ca, K, Zn and Mg) of developed buckwheat cookies decreased withincrease in wheat flour supplementation levels. Sensory characteristics of supplemented cookies increasedwith increase in supplementation levels of wheat flour and were acceptable by judges in terms of test,colour, texture and overall acceptability. Cookies developed from C 50% C supplementation level of wheatflour got maximum scored points while C0 control C0 was found to be more nutritious and gluten freehaving more crude protein and mineral contents when compared to supplemented cookies.

scholarly journals The effect of the stage of maturity of alfalfa (Medicago sativa L.) on the chemical composition and in sacco digestibility

2008 ◽  
Vol 56 (1) ◽  
pp. 55-64 ◽  
Author(s):  
Petr Doležal ◽  
Jiří Skládanka
Keyword(s):  
Organic Matter ◽  
Chemical Composition ◽  
Negative Correlation ◽  
Crude Protein ◽  
Fibre Content ◽  
Crude Fibre ◽  
Nitrogenous Substances ◽  
Organic Matter Digestibility ◽  
Crude Fibre Content ◽  
In Sacco

The influence of the stage of maturity of alfalfa on the chemical composition and in sacco digestibility was studied in a laboratory experiment. Alfalfa plants were analysed in 8 vegetation stages harvested in regular intervals before the beginning of bud setting until the fall of blossoms. The contents of nitrogenous substances, fat, crude fibre, ADF, NDF, Ca, P, Na, K and Mg were determined in the samples, and using the in sacco method also the organic matter digestibility in the rumen. Further we assessed the energy content and calculated the N−free extractives (BNLV) value. In some stages the chemical changes were monitored in the whole plant. It was discovered that during vegetation there was a statistically significant increase in the crude fibre content and in the ADF and NDF fractions and a reduction in nitrogenous substances. A strong negative correlation was detected between the stage of maturity of alfalfa and content of crude protein and net energy for lactation (r = −0.97 and r = −0.92, respectively). In the individual stages of vegetation the differences in the content of nitrogenous substances, fibre and fat were statistically significant (P < 0.05). The statistically highest content of crude protein (28.97%) was detected in the first stage before bud setting and the lowest (11.97%) in the stage after the fall of blossoms. Later vegetation also had a stronger depressive effect on the content of fat and NEL. The organic matter digestibility (P < 0.05) was the lowest in alfalfa in the last stage of sampling (62.6%) when it reached a mere 85.99% of the digestibility at the beginning of bud setting. The highest organic matter digestibility (72.80%) was detected in a sample of young alfalfa prior to bud setting. In the experiment we confirmed a strong and negative correlation (r = −0.97) between the crude fibre content and organic matter digestibility. The correlation was also strong between the stage of maturity of alfalfa and the content of magnesium (Mg).

scholarly journals Apparent digestibility of nutrients, energy, and amino acid of nontoxic and detoxified physic nut cakes for Nile tilapia

2015 ◽  
Vol 50 (9) ◽  
pp. 849-853
Author(s):  
Hamilton Hisano ◽  
Marco Aurélio Lopes Della Flora ◽  
José Luiz Pilecco ◽  
Simone Mendonça
Keyword(s):  
Amino Acids ◽  
Amino Acid ◽  
Nile Tilapia ◽  
Crude Protein ◽  
The Other ◽  
Apparent Digestibility ◽  
Ether Extract ◽  
Physic Nut ◽  
Apparent Digestibility Coefficient ◽  
Gross Energy

Abstract:The objective of this work was to evaluate the apparent digestibility coefficients of nutrients, energy, and amino acids of nontoxic and detoxified physic nut cakes treated with solvent plus posterior extrusion, for Nile tilapia. The apparent digestibility coefficients of crude protein and gross energy were higher for detoxified than for nontoxic physic nut cake. However, the apparent digestibility coefficient of ether extract of the nontoxic physic nut cake was higher than that of the detoxified one. The apparent digestibility coefficient of amino acids of both feed ingredients was superior to 80%, except for glycine, for the nontoxic psychic nut cake, and for threonine, for the detoxified one. Nontoxic and detoxified physic nut cakes show apparent digestibility coefficient values equivalent to those of the other evaluated oilseeds and potential for inclusion in Nile tilapia diets.

The relationship between the crude-fibre content of pasture and other feeding-stuffs and their digestibility and starch equivalent

1949 ◽  
Vol 39 (3) ◽  
pp. 254-258 ◽  
Author(s):  
E. G. Hallsworth
Keyword(s):  
Regression Analysis ◽  
Regression Coefficient ◽  
Fibre Content ◽  
Regression Coefficients ◽  
Published Data ◽  
Crude Fibre ◽  
Wide Range ◽  
Significant Difference ◽  
The Relationship ◽  
Crude Fibre Content

A study of the published data for feeding-stuff composition, digestibility and starch equivalent has shown that a linear relationship exists between the crude-fibre content and digestibility, and between crude-fibre content and starch equivalent.No significant difference was found between the regression coefficients for crude fibre and digestibility for sheep and cattle, but the coefficients for horses and pigs were notably larger, and significantly so for pigs.For pasture herbage the relationship between protein and starch equivalent was found to be merely a reflexion of the fibre content, and the regression coefficient between them became non-significant when crude fibre was included in the regression analysis. An equation has been obtained connecting crude fibre with starch equivalent, which is valid over a wide range of pasture species and fibre contents.

The apparent digestibility of the non-nitrogenous components of ruminant feeds

1960 ◽  
Vol 55 (3) ◽  
pp. 391-394 ◽  
Author(s):  
J. Glover ◽  
H. W. Dougall
Keyword(s):  
Protein Content ◽  
Crude Protein ◽  
Apparent Digestibility ◽  
Crude Protein Content ◽  
Crude Fibre ◽  
Carbohydrate Digestibility ◽  
Protein Components

The digestibility of the non-protein constituents (almost entirely carbohydrate) of ruminant fodders is shown to be a function of the level of the crudefibre and crude-protein components.The effect of increasing crude fibre in the diet is to depress the digestibility of carbohydrate, irrespective of the level of crude protein associated with it.The effect of crude protein on the digestibility of carbohydrate is only well marked when its concentration in the dry feed lies below some 5%, that is when the feed is below approximate maintenance levels. Increasing the crude-protein content of the diet from some 2 to about 5% leads to increased digestibility of carbohydrate, but thereafter in the range of some 6–30% crude protein the protein effect is very slightly depressing to carbohydrate digestibility and is apparently quite negligible at average crude-fibre concentrations to be expected at any given level of crude protein.The implications of the various aspects of this paper are that the variability in digestibility of the non-nitrogenous component of ruminant feeds depends mainly on the respective levels of crude protein and crude fibre in the diet and to a very much lesser extent, if at all, on the species of ruminant or class of feed, be it silage, roughage or even mixture.

scholarly journals The effect of ADD-H preservative (ammonium propionate) on the quality and feedingvalue of baled hay

1981 ◽  
Vol 53 (2) ◽  
pp. 100-108
Author(s):  
Aino Rauramaa
Keyword(s):  
Beneficial Effect ◽  
Field Experiments ◽  
Sugar Content ◽  
Application Rate ◽  
The Other ◽  
Fibre Content ◽  
Slight Improvement ◽  
Crude Fibre ◽  
Feeding Value ◽  
Crude Fibre Content

The effect of ADD-H at 3 or 4 rates of application on the quality and feeding value of baled hay at 3 dey matter levels (65.0—69.9, 70.0—74.9 and 75.0—79.9 %) was studied on Hankkija’s farm in Kangasala and at DM 78—82 % on the Koivisto farm in Hausjärvi. The field experiments were performed in 1979 and the testing of the hay completed by the following spring. The field experiments were affected by uneven drying of the hay, uneven rewetting due to rainfall after cutting, loss of ADD-H during application, uneven distribution of ADD-H in the bales, and other factors. At DM 65.0—69.9 % ADD-H gave only a slight improvement in hay quality; at the highest application rate the sugar content was the highest and the crude fibre content the lowest. At the other DM levels ADD-H restricted the generation of heat during storage; the sugar content was higher, and the mould count lower, in the treated hay than in the untreated hay. The beneficial effect of ADD-H on the feeding value of baled hay was small; further study on this aspect is required.

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