EFFECT OF THE MINK’S FURRING PROCESS ON FEED CONSUMPTION AND NITROGEN RETENTION

1971 ◽  
Vol 51 (3) ◽  
pp. 757-760 ◽  
Author(s):  
L. SEIER ◽  
R. J. KIRK ◽  
D. B. BRAGG
Keyword(s):  
Nitrogen Balance ◽  
Hair Growth ◽  
Dry Matter ◽  
Nitrogen Retention ◽  
Protein Digestibility ◽  
Metabolic Effect ◽  
Test Period ◽  
Feed Consumption ◽  
One Year ◽  
Two Peaks

A series of seven nitrogen balance studies was conducted, with 12 one-year-old male mink, to examine the metabolic effect of furring in mink. The balance studies, each of two days duration, were carried out on July 14–15 and then semi-monthly until October 15–16, inclusive. Feed consumption increased (P < 0.05) a total of 97% during the furring process. Nitrogen retention changed, but not in a manner parallel to feed consumption. Two peaks were observed for nitrogen retention, one occurring on August 18–19 and the second on October 1–2. The October 1–2 nitrogen retention peak coincided with the initiation of hair growth (September 25). No change was noted in dry matter or protein digestibility over the entire test period.

Utilization of grass-silage nitrogen by growing sheep

1983 ◽  
Vol 100 (1) ◽  
pp. 43-62 ◽  
Author(s):  
Elisabeth Grenet
Keyword(s):  
Organic Matter ◽  
Formic Acid ◽  
Nitrogen Balance ◽  
Crude Protein ◽  
Nitrogen Loss ◽  
Nitrogen Retention ◽  
Protein Digestibility ◽  
Water Soluble ◽  
Nitrogen Intake ◽  
Green Fodder

SUMMARYThe digestibility, the voluntary intake and the nitrogen balance of 108 diets corresponding to 94 silages prepared from 20 fresh crops were measured in growing sheep. Series of silages were made from the same fresh forage. Each series included two controls: a direct-cut silage without additive and a direct-cut silage with formic acid, with a variable number of experimental silages with different additives.Rumen ammonia concentration, measured on rumen-fistulated sheep, decreased when an additive was used. It increased with nitrogen intake and was inversely related to the organic-matter digestibility and the crude-fibre digestibility. It varied with the silage composition.The crude-protein digestibility of direct-cut silages without additives was similar to or slightly higher than the crude-protein digestibility of the fresh crops. The addition of formic acid depressed the digestibility, but the addition of formaldehyde decreased it even more. The urinary nitrogen loss was higher for silages without additive than for the fresh crops and was decreased by the addition of formic acid. The addition of formaldehyde to formic acid had an additive effect.Retained nitrogen was lower in silages without additives (12% of nitrogen intake) than in parent crops (15·7%). It increased when formic acid (15·8%) was added. The addition of formaldehyde at a low rate (1·5 l/t green fodder) to the formic acid did not increase the nitrogen retention whether expressed in g/day or as percentage of nitrogen intake, but the addition of formaldehyde at a high rate (3·5 l/t green fodder) to formic acid decreased nitrogen retention. The other additives based on cereals or whey did not improve the nitrogen balance compared with formic acid. Nitrogen retention differed according to plant species.Retained nitrogen increased with digestible organic-matter intake and nitrogen intake. It increased with the silage water-soluble carbohydrate content. The higher the silage fermentation product content (ammonia, lactic acid, propionic acid), the lower the retained nitrogen. It appears that the nitrogen value of silages can be high provided that the silages are well preserved and that excessive protein breakdown is avoided.

NUTRITIVE VALUE OF RAPESEED FLOUR FOR MINK: EFFECTS ON LIVE PERFORMANCE, NUTRIENT UTILIZATION, THYROID FUNCTION AND PELT QUALITY

1974 ◽  
Vol 54 (4) ◽  
pp. 639-644 ◽  
Author(s):  
R. J. BELZILE ◽  
L. S. POLIQUIN ◽  
J. D. JONES
Keyword(s):  
Weight Gain ◽  
Dry Matter ◽  
Nutritive Value ◽  
Nitrogen Retention ◽  
Nutrient Utilization ◽  
Feed Consumption ◽  
Live Performance ◽  
Iodine Level ◽  
Gross Energy ◽  
Matter Basis

A trial for testing the replacement value of rapeseed flour (RF) (blend of Brassica napus and campestris) for raw meat was conducted with growing-furring mink. The RF contained 67% crude protein and approximately 1/10 of the quantity of glucosinolates normally found in commercial meal. Forty male pastel mink were fed diets containing 0, 6.5, 13.4 and 20% RF (dry-matter basis) from the end of July to pelting. On a dry-matter basis, the diets contained approximately 41% protein and the percentages of protein as RF protein were 0, 4.3, 9 and 12.4. Initially, the animals ate significantly (P < 0.05) more feed and grew significantly (P < 0.05) faster on the 0 and 6.5% RF diets, but later, weight gain and feed consumption were the same for all groups (P > 0.05). After 70 days on trial, weight gain was less (P < 0.05) on the 20% RF diet compared with the 0 and 6.5% diets. There was a significant (P < 0.05) reduction in the apparent digestibilities of dry matter, gross energy and nitrogen, and in nitrogen retention for the mink receiving the diets containing 13.4 and 20% RF. Mink fed the 20% RF diet showed significant (P < 0.05) thyroid hypertrophy, but at slaughter serum protein-bound iodine level was the same (P > 0.05) for all groups. There was little difference among groups with respect to pelt size and pelt quality.

COMPARISON OF THE EFFECTS OF DARK AND YELLOW RAPESEED HULLS, SOYBEAN HULLS AND A PURIFIED FIBER SOURCE ON GROWTH, FEED CONSUMPTION AND DIGESTIBILITY OF DIETARY COMPONENTS IN STARTER PIGS

1985 ◽  
Vol 65 (1) ◽  
pp. 231-237
Author(s):  
B. N. MITARU ◽  
R. BLAIR
Keyword(s):  
Dry Matter ◽  
Protein Digestibility ◽  
Feed Consumption ◽  
Average Weight ◽  
Soybean Hulls ◽  
Soybean Hull ◽  
Dietary Components ◽  
Dietary Treatments ◽  
Average Weight Gain ◽  
Matter Energy

A trial involving a total of 56 weanling pigs was conducted to investigate the effects of including dark (Tower) and yellow (R500) rapeseed hulls, soybean hulls and a purified fiber source (Celufil) as 10% of the diets of starter pigs. The animals were offered the experimental diets from 5 to 9 wk of age. The pigs fed on the R500 hull diet had lower (P < 0.05) average weight gain (273 g/day) and feed consumption (481 g/day) values than those fed the other diets, which ranged from 400 to 466 g/day and from 755 to 882 g/day, respectively. The feed efficiency (gain:feed) values were similar for all dietary treatments with values ranging from 0.53 to 0.57. The lower feed consumption observed for the R500 hull diet was suspected to be due to poor palatability of these hulls probably caused by some hydrolytic products of glucosinolates. The dry matter, energy and protein digestibility coefficients for both rapeseed hull diets were similar. The R500 rapeseed hull diet had higher (P < 0.05) digestibility values for dry matter, energy and protein than the soybean hull diet while the Tower rapeseed and soybean hull diets had similar digestibility values for these components. The Celufil diet had similar dry matter and energy digestibility values with the SBH diet but the protein digestibility value for Celufil was higher (P < 0.05) than that of the soybean hull diet and similar to those of the rapeseed hull diets. The crude fiber digestibility values were similar for all diets. Key words: Dark and yellow rapeseed, hulls, fiber, growth performance, digestibility, swine

Dry matter intake, nutrient digestibility and nitrogen balance of WAD sheep fed ensiled maize stover and concentrate supplement

2020 ◽  
Vol 46 (2) ◽  
pp. 284-294
Author(s):  
A. J. Amuda ◽  
K. J. Onaleye ◽  
O. J. Babayemi
Keyword(s):  
Nitrogen Balance ◽  
Dry Matter ◽  
Nitrogen Retention ◽  
Nutrient Digestibility ◽  
West African ◽  
Dry Matter Intake ◽  
Crude Fibre ◽  
Maize Stover ◽  
West African Dwarf ◽  
Sheep Production

A study on effect of ensiled maize stover (EMS) and protein concentrate supplement (CS) on nutrient digestibility and nitrogen balance of ensiled maize stover (EMS) and concentrate supplement (CS) by West African Dwarf ewe was carried out. were showed Fifteen West African dwarf ewe with body weight of 14-16 kg allotted to individual metabolic cage in completely randomized design after preliminary feeding trial. The treatments were: A (75% EMS + 25% CS), B (50% EMS + 50% CS), C (25% EMS + 75% CS), D (100%EMS) and E (100% CS). The digestibility study lasted for seven days to determine dry matter digestibility, nutrients digestibility and nitrogen retention of WAD ewe fed ensiled maize stover and concentrate supplement. Results that dry matter intake (DMI), digestible crude protein (DCP), digestible crude fibre (DCF), digestible nitrogen free extract (DNFE), and total digestible nutrients (TDN) ranged from 321.65- 694.41gDM/day, 3.99 - 12.30%, 7.32 - 17.23%, 33.35 – 38.85% and 63.65 – 70.92%, respectively. Dry matter intake of ewe fed sole ensiled maize stover (diet D) was lowest (321.65gDM/day) while animals on diet C (25% EMS+75%CS) had the highest (694.41gDM/d). Apparent digestibility of CP was lowest (3.99%) in ewe fed sole EMS and highest (12.20%) in ewe fed diet C (25% EMS + 75% CS). Positive N-balance was observed for all the five diets, but it was highest (P< 0.05) in diet B (50%+50%) and lowest in diet D (100% EMS). Similarly, N-retention was highest (67.15%) in diet B and lowest (27.61%) in diet D. Therefore, diet made up of 50% ensiled maize stover and 50% concentrate is recommended for sheep production.

scholarly journals RUMEN FERMENTATION AND DIGESTIBILITY IN STEERS AS INFLUENCED BY LEVEL OF INTAKE AND MONENSIN

1983 ◽  
Vol 63 (4) ◽  
pp. 855-860
Author(s):  
G. M. J. HORTON ◽  
M. J. FARMER ◽  
K. A. BASSENDOWSKI ◽  
G. M. STEACY
Keyword(s):  
Feed Intake ◽  
Crude Protein ◽  
Dry Matter ◽  
Rumen Fluid ◽  
Control Diet ◽  
Protein Digestibility ◽  
Rumen Fermentation ◽  
Feed Consumption ◽  
Plasma Urea ◽  
Four Levels

The effects of level of feed intake and monensin on rumen fermentation and digestibility in steers were evaluated. The four levels of feed intake were 30, 50, 70 and 90 g of dry matter per kilogram body weight raised to the 0.75 power (g/kg0.75). Monensin was included at 0 and 33 mg/kg diet. The diet contained 60% rolled barley and 36.5% alfalfa pellets. Organic matter digestibility decreased (P < 0.05) with increasing levels of intake when the control diet was fed but was not affected by intake when monensin was included in the feed. Crude protein digestibility was consistently higher (P < 0.05) in monensin than control-fed steers at all four intake levels and decreased with increasing feed consumption in steers fed both control and monensin diets. Rumen fluid pH and ammonia and plasma urea nitrogen were not affected by monensin, and decreased (P < 0.05) as feed intake increased. Both higher feed intake and monensin caused an increase in the molar proportion of ruminal propionic acid and a decrease in the proportion of acetic acid. Key words: Intake monensin, digestibility, PUN, VFA, cattle

Intensive beef production VII. The effect on nitrogen retention of diets containing barley processed by four different methods

1966 ◽  
Vol 8 (1) ◽  
pp. 39-42 ◽  
Author(s):  
M. Kay ◽  
T. R. Preston ◽  
N. A. MacLeod ◽  
Euphemia B. Philip
Keyword(s):  
Nitrogen Balance ◽  
Dry Matter ◽  
Nitrogen Retention ◽  
Dry Matter Intake ◽  
Beef Production ◽  
Dry Matter Digestibility

1. Nitrogen balance studies were conducted on 16 steers in two separate trials. The steers were fed on four diets containing respectively dry rolled barley; dried, steamed and rolled barley; dried, crimped barley and barley that had been stored in a sealed silo and rolled.2. There were no significant differences in the dry-matter intake of any of the diets.3. No consistent differences between the diets in dry-matter digestibility or nitrogen retention were observed.

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

1973 ◽  
Vol 53 (2) ◽  
pp. 307-316 ◽  
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.

scholarly journals Nutrient utilization by rabbits fed brewers' dried grains from different proportions of barley, maize and sorghum

2021 ◽  
Vol 31 (2) ◽  
pp. 189-193
Author(s):  
J. A. Olupona ◽  
O. O. Balogun
Keyword(s):  
New Zealand ◽  
Crude Protein ◽  
Dry Matter ◽  
Nitrogen Retention ◽  
Protein Digestibility ◽  
Nutrient Utilization ◽  
Metabolizable Energy ◽  
Randomized Design ◽  
Local Sources ◽  
Completely Randomized Design

An experiment was conducted to evaluate the energy and protein of Brewers' Dried Grains (BDG) produced from different proportions of harley, maize and sorghum on the performance of rabbits. Sixteen (16) rabbits made up of New Zealand and Chinchilla, eight (8) weeks old averaging 1.20kg were used in the trial in a completely randomized design. The four (4) diets were BDG (maize: barley: sorghum) (BDG MBS); BDG (maize: harley) (BDGMB); BDG (maize: sorghum) (BDG MS) and BDG (sorghum) (BDG S). The diets were the only source of protein and energy. The treatment effect was significant (p < 0.05) with the highest crude protein digestibility and nitrogen retention values recorded for BDG MBS. The digestible and metabolizable energy values were not significantly different (p > 0.05) for the BDG investigated. The digestible energy values determined for BDG MS, BDGS, BDG MBS and BDG MB in W/kg of dry matter were 16.97, 15.57, 14.84 and 13.35 respectively while the values for ME in MJ/kg of dry matter were 16.32, 14.91, 14.31 and 12.34 respectively. BDG from local sources have potential to make complete feed for rabbits judging from their impressive energy and protein values.

Digestibility Studies on Venezuela Grass (Paspalum fasciculatum) and Plantain Pseudostalks (Musa paradisiaca)

1969 ◽  
Vol 44 (3) ◽  
pp. 103-106
Author(s):  
J. A. Arroyo ◽  
L. Rivera Brenes
Keyword(s):  
Crude Protein ◽  
Dry Matter ◽  
Protein Digestibility ◽  
Dry Matter Intake ◽  
Feed Consumption ◽  
Musa Paradisiaca ◽  
Gross Energy

A study was undertaken to determine the digestibility of Venezuela grass (Paspalum fasciculatum) and plantain pseudostalks (Musa paradisiaca). Two groups of four cows were fed separately with the two roughages. It was found that plantain pseudostalks were lower in dry matter, crude protein, and gross energy than Venezuela grass. Based on feed consumption and dry-matter intake, plantain pseudostalks were more palatable than Venezuela grass. The protein digestibility of Venezuela grass was higher than that of plantain pseudostalks. The reverse held for the energy digestibility.

THE INFLUENCE OF APPARENT DIGESTIBLE ENERGY AND APPARENT DIGESTIBLE NITROGEN IN THE DIET ON WEIGHT GAIN, FEED CONSUMPTION, AND NITROGEN RETENTION OF GROWING MINK

1962 ◽  
Vol 40 (1) ◽  
pp. 1375-1389 ◽  
Author(s):  
D. G. Sinclair ◽  
E. V. Evans ◽  
I. R. Sibbald
Keyword(s):  
Weight Gain ◽  
Linear Relationship ◽  
Food Consumption ◽  
Dry Matter ◽  
Energy Content ◽  
Nitrogen Retention ◽  
Feed Consumption ◽  
Digestible Energy ◽  
Available Energy ◽  
Food Consumed

The influences of the apparent digestible energy (A.D.E.) and the apparent digestible nitrogen (A.D.N.) content of the diet on the food consumption, nitrogen retention, and growth of mink from weaning to pelting age have been determined. It was demonstrated with diets containing from 3.33 to 4.21 Cal of A.D.E. and 26.14 to 39.76 mg of A.D.N. per g of dry matter that increasing the available energy and nitrogen in the diet had a beneficial influence on the growth of mink from 6 to 26 weeks of age. A linear relationship existed between the weight of food consumed and the reciprocal of the A.D.E. content of the food, which indicated that food consumption was largely regulated by the digestible energy content of the diet. The percentage of digestible nitrogen retained was curvilinearly related to the A.D.E.:A.D.N. ratio and appeared to be maximal when the diet contained 140 Cal of digestible energy per g of digestible nitrogen.

Sign in / Sign up

Export Citation Format

Share Document