scholarly journals Nutrient retention, haematology and serum biochemistry of cockerels fed graded levels of cassava (Manihot esculenta) grit supplemented with moringa (Moringa oleifera) leaf meal

2021 ◽  
Vol 44 (3) ◽  
pp. 314-324
Author(s):  
S. E. Okosun ◽  
S. A. Eguaoje
Keyword(s):  
Control Diet ◽  
Nutrient Retention ◽  
Nutrient Utilization ◽  
Serum Biochemistry ◽  
Nutrient Digestibility ◽  
Crude Fibre ◽  
Mean Values ◽  
Leaf Meal ◽  
Inclusion Level ◽  
Dietary Treatments

A sixteen week trial was conducted to assess the effect of replacing cassava grit supplemented with Moringa leaf meal (MLM) for maize on the nutrient retention, haematology and serum biochemistry of 120 “day old” Harco cockerel chickens. Four experimental cockerel starter and finisher diets were formulated with diet 1 formulated to contain 0% cassava grit while diet 2, 3 and 4 were formulated to contain cassava grit at 33.3, 66.6 and 100% replacement for maize with 5% of moringa leaf meal inclusion in diets 2, 3 and 4 respectively. Chicks were randomly assigned to the four treatment diets in a completely randomized designed (CRD). Result on nutrient digestibility show that crude fibre was significantly (P<0.05) affected by the treatment diets with highest values of 68.21 recorded in birds fed diet 4. Ash and NFE were significantly (P<0.05) influenced by the treatment diets with highest mean values (50.81 and 55.15) observed in birds placed on 100% CGM. Haematological indices revealed that Packed Cell Volume was significantly (P<0.05) highest 32.17% among birds fed the control diet. However, neutrophil was significantly (P<0.05) affected by the treatment diets with highest value 17.67% recorded in birds fed the control diet. Serological study revealed that Albumin value was significantly (P<0.05) influenced by the dietary treatments with highest value (1.60mg/dl) recorded among birds fed 33.3% CGM based diet. Therefore, Cassava grit can replace maize up to 66.6% inclusion level with 5% appropriate supplementation with moringa leaf meal in cockerel diet for optimum nutrient utilization and blood quality.

ACCEPTABILITY AND UTILIZATION OF GRADED LEVELS OF GMELINA ARBOREA AND CASSAVA PEELS CONCENTRATES IN WEST AFRICAN DWARF SHEEP

2015 ◽  
Vol 4 (2) ◽  
pp. 415-422
Author(s):  
Amoka Pius ◽  
Tawose O M
Keyword(s):  
Dry Matter ◽  
Nutritive Value ◽  
Control Diet ◽  
Nutrient Digestibility ◽  
Dry Matter Intake ◽  
Gmelina Arborea ◽  
Leaf Meal ◽  
Dry Matter Digestibility ◽  
Inclusion Level ◽  
Cassava Peels

The nutritive value ,voluntary dry matter intake, and the nutrient digestibility of graded levels of Gmelina arborea and cassava peels concentrates in WAD sheep was investigated. Twelve WAD sheep aged 1-2 years old and weighting 14.00± 0.45 kg were used in a complete randomized design. Diets were formulated such that cassava peels was replaced with Gmelina arborea leaf meal at 0, 33.33, 66.67, 100% levels, designated as diets A, B, C, and D respectively. Diet without Gmelina arborea leaf meal was tagged the control diet. The concentrate feed was compounded to contain 16% CP. Diets with 33.33% inclusion level of Gmelina arborea had significantly (P<0.05) higher dry matter intake (DMI) 598.80g day-1, while the lowest DMI 425.00g day-1 was obtained in animals fed 100% inclusion level of Gmelina arborea. Crude protein intake (CPI) of animals fed diets with 33.33% inclusion levels of Gmelina arborea were significantly (P<0.05) highest, followed by 66.67% inclusion level and the least was observed in 0% inclusion level of Gmelina arborea. Dry matter digestibility (DMD) was significantly (P<0.05) different across the dietary treatments, animals placed on diets with 33.33% inclusion level had the highest DMD, followed by animals on diets with 66.67, 100 and 0% inclusion levels. CP digestibility (P<0.05) increased from 33.33% to 100% inclusion levels of Gmelina arborea leaf meal, the lowest CP digestibility was observed at 0% inclusion level. CF digestibility (P<0.05) increased from 33.33% to 100% inclusion levels of Gmelina arborea leaf meal, while the lowest CF digestibility was observed at 0% inclusion level. N intake increased significantly (P<0.05) with increase in the level of Gmelina arborea inclusion from 33.33% to 100%. N retention was significantly (P<0.05) different, diets with 33.33% Gmelina arborea inclusion had the highest value (64.36g day-1) followed by 66.67%, 100% and the least (52.64g day-1) was at 0% inclusion level of Gmelina arborea.  N balance values also followed the same trend. From the results of this study, it can be concluded that the inclusion of Gmelina arborea leaf meal in WAD rams diet was well tolerated without adverse effect on acceptability, intake and nutrient digestibility, and inclusion level of 33.33% is hereby recommended in ruminants diet for optimum performance and productivity.

Full-Fat Insect Meal as a Protein and Energy Source for Weaned Piglets: Effects on Growth Performance, Nutrient Digestibility, Gastrointestinal Function and Microbiota

2020 ◽  
Author(s):  
Ingrid Marie Håkenåsen ◽  
Guro Holseth Grepperud ◽  
Jon Øvrum Hansen ◽  
Margareth Øverland ◽  
Ragnhild Martinsen Ånestad ◽  
...  
Keyword(s):  
Growth Performance ◽  
Relative Abundance ◽  
Morphological Changes ◽  
Control Diet ◽  
Dietary Treatment ◽  
Nutrient Digestibility ◽  
Gastrointestinal Function ◽  
Balanced Diet ◽  
Inclusion Level ◽  
Dietary Treatments

Abstract Background: Weaning is associated with growth decline and morphological changes in the gastrointestinal tract of the pig. Insects, such as the Black soldier fly larvae (BSFL), are suggested as a sustainable novel protein source in diets for pigs. They contain chitin, medium chained fatty acids, and anti-microbial peptides, which could improve the gastrointestinal function and health in the post-weaning pig. The objective of this study was therefore to investigate the effect of increasing inclusion of full-fat BSFL in diets for post-weaning pigs on growth performance parameters, digestibility, gut morphology, and the microbial community in the colon. Eighty crossbred weanling pigs were weaned at approximately 32 days of age, with an average weaning weight of 10.6 ± 0.8 kg. For four weeks, the pigs were fed one of four dietary treatments: a control diet or one of three diets containing an increasing amount of full-fat BSFL meal: 4.76% (BSFL5), 9.52% (BSFL10), and 19.06% (BSFL20). Results: Increased level of full-fat BSFL in the diet did not affect growth performance or fecal consistency. A reduction in apparent total tract digestibility (ATTD) of crude protein (P = 0.035) was found for increased inclusion of BSFL, whereas the ATTD of crude fat increased (P<0.001). Jejunal, ileal, or colonic morphometry was not affected by the BSFL inclusion. Some changes in the colon microbiota were observed, but no differences in the short-chain fatty acid concentrations were detected between the dietary treatments. At the phylum level, dietary treatment affected the relative abundance of Bacteroidota, Firmicutes, Campilobacteria, and Thermoplasmatota, but there was no clear pattern relationship with the BSFL inclusion level. At the genus level, the inclusion of BSFL in the diet reduced the relative abundance of Lactobacillus (P = 0.015) compared to the control. Conclusions: Collectively, the results indicate that up to 19.06% of full-fat BSFL meal could be included in a balanced diet for PW pigs without affecting growth performance, gut function, or health.

Growth performance and digestibility of nutrients by weaner rabbits (Oryctolagus cuniculus) fed diets containing varying levels of cowpea (Vigna unguiculata) milling waste

2020 ◽  
Vol 47 (3) ◽  
pp. 149-154
Author(s):  
A. A. Malik ◽  
Y. S. Kudu ◽  
M. Abdullahi ◽  
M. J. Ibrahim
Keyword(s):  
Body Weight ◽  
Growth Performance ◽  
Feed Intake ◽  
Body Weight Gain ◽  
Control Diet ◽  
Nutrient Digestibility ◽  
Control Treatment ◽  
Crude Fibre ◽  
Final Body Weight ◽  
Dietary Treatments

Conventional feed resources for livestock are increasingly becoming more expensive, due to competition with man; hence nutritionists are searching for cheaper, locally-available alternatives. A total of forty-five (45) mixed sex weaner rabbits, aged 5 – 6 weeks, with average initial weights of between 694.42 and 761.10 g were used to investigate the effect of varying levels of cowpea milling waste (CMW) diets on their growth performance and nutrient digestibility. They were randomly allotted to five dietary treatments with nine rabbits per treatment. The control treatment (T1) contained 0 % CMW while treatments T2, T3, T4 and T5 had 10, 20, 30 and 40 % CMW dietary inclusion levels, respectively. Clean water and feed were offered ad libitum daily to the rabbits, and record of their feed intake and growth performance were taken for 12 weeks. At the end of the 11th week, a nutrient digestibility trial was carried out. Results show that there were no significant (P>0.05) differences in final body weight, body weight gain, total feed intake and mortality among the dietary treatments. Feed conversion ratio (FCR) for diets T4 (6.65) and T5 (6.66) containing 30 and 40 % CMW respectively, were as good as that of the control diet (6.11). Dry matter and crude protein digestibility showed no significant (P>0.05) difference across the treatments. Digestibility of crude fibre (72.64, 80.16, 84.04 and 80.90 % for T2, T3, T4 and T5 respectively), ether extract (95.98, 94.90, 96.04 and 94.38 % for T2, T3, T4 and T5 respectively), nitrogen free extract (94.30, 95.18, 93.58 and 94.90 % for T2, T3, T4 and T5 respectively), as well as total digestible nutrient (83.69, 76.11, 81.67 and 80.02 % for T2, T3, T4 and T5 respectively) of the test diets compared favourably with that of the control diet (72.94, 95.23, 96.04 and 80.47 % for CF, EE, NFE and TDN respectively). Hence, it can be concluded that CMW can be used safely as a protein source and included up to 40 % in weaner rabbit diets with no detrimental effect on their growth performance and nutrient digestibility.

Blood Profile and Selected Organ Histopathology of Balami Sheep Fed Shea Cake (Vitellaria paradoxa) Meal

2021 ◽  
pp. 46-56
Author(s):  
D. O. Okunlola ◽  
M. D. Shittu ◽  
O. O. Olatunji ◽  
A. J. Amuda ◽  
B. O. Olateju ◽  
...  
Keyword(s):  
Blood Cell ◽  
Control Diet ◽  
Average Weight ◽  
Blood Profile ◽  
Significant Difference ◽  
Randomized Experimental Design ◽  
Inclusion Level ◽  
Males And Females ◽  
Dietary Treatments ◽  
Representative Samples

The blood profile and histology of selected tissues (kidney, lungs, intestine, and epididymis) of Balami Sheep fed Shea Cake meal supplement was investigated. A total of thirty-two (32) sheep of the average weight range of 11.75-14.75kg comprising an equal number (16) of males and females were randomly allotted to four dietary treatments in a completely randomized experimental design with eight sheep per treatment for twelve weeks duration. Treatment 1 (T1) was a control diet and had zero inclusion level of Shea cake meal (SCM), while treatments 2,3, and 4 had 10%,15%, and 20%  inclusion of SCM, respectively. At the twelfth week of the experiment, two blood samples of 5ml each were taken from each animal from the jugular vein. The first set was preserved in Ethylene Diamine Tetra Acetic Acid (EDTA) bottle for haematological parameters, while the second samples were preserved without EDTA for serum examination. Representative samples of tissues were randomly selected and slaughtered for gross microscopic examination. There was a significant difference (P<0.05) at various levels of inclusion for parameters investigated. The white blood cell (WBC), Red blood cell (RBC), and Packed cell volume (PCV) recorded the highest values at T3 (15% inclusion level) (13.42 x109/L), 2.92x1012/L, 3.75%, respectively). The serum parameters were significantly(p <0.05)different among the treatments. Total protein ranges from 54.78(mg/dl) (T1) - 60.51(mg/dl) (T2), Cholesterol70.15(mg/dl) (T1) - 78.00(mg/dl) (T4). Iron ranges from 58.15(ug/dl) (T1) - 62.88(ug/dl) (T3).The histopathology of tissues (kidney, lungs, intestine, and epididymis) showed no alteration across the treatments (P= .05) in the gross microscopic examinations. No lesion was observed in the lungs, kidney, epididymis, and intestine. The results showed that shea cake meal posed no health risk to Balami sheep and as such recommended as a good supplement in the diets of the sheep.

330 3-nitrooxypropanol Supplementation of a Forage Diet Decreased Enteric Methane Emissions from Beef Cattle Without Affecting Apparent Total-tract Digestibility

2021 ◽  
Vol 99 (Supplement_3) ◽  
pp. 186-187
Author(s):  
Aklilu Alemu ◽  
Xiu Min Zhang ◽  
Maik Kindermann ◽  
Karen A Beauchemin
Keyword(s):  
Crude Protein ◽  
Dry Matter ◽  
Control Diet ◽  
Nutrient Digestibility ◽  
Ch4 Emissions ◽  
Ruminal Ph ◽  
Enteric Methane ◽  
Ruminant Diets ◽  
Dietary Treatments ◽  
High Forage

Abstract Supplementation of ruminant diets with the investigational methane (CH4) inhibitor 3-nitrooxypropanol (3-NOP; DSM Nutritional Products, Switzerland) is as a promising mitigation strategy. However, most studies have examined high grain or mixed forage-concentrate diets. The objective of this study was to evaluate the effects of supplementing a forage diet with 3-NOP on rumen fermentation, CH4 emissions and apparent total-tract nutrient digestibility. Eight ruminally cannulated beef heifers (BW = 514 kg) were randomly allocated to two treatments in a crossover design with 49-d periods. Dietary treatments were: control, high-forage diet (90% forage DM basis) without 3-NOP; and NOP, control diet supplemented with 150 mg 3-NOP/kg DM. After a 14-d diet adaption, dry matter (DM) intake (DMI) was recorded daily. Rumen contents were collected on days 17 and 28 for volatile fatty acid (VFA) analysis, whereas ruminal pH was continuously monitored from day 20 to 27. Diet digestibility was measured on day 38 to 41 by total collection of feces. Enteric CH4 emissions were measured on days 46 to 49 in chambers. Dry matter intake was lower (P = 0.001) for NOP (10.0 kg/d) as compared with control (10.2 kg/d). However, DM, neutral and acid detergent fiber, and crude protein digestibilities were similar between treatments (P ≥ 0.29). Although total VFA concentration was not affected by treatment (P = 0.19), the reduction in acetate and increase in propionate proportion for NOP lowered (P &lt; 0.001) the acetate to propionate ratio by 18% as compared with control. Mean pH was lower (P = 0.03) for control (6.46) than NOP (6.57). Furthermore, CH4 yield (g/kg DMI) was 21.6% less (P &lt; 0.001) for NOP relative to control (25.5 g/kg DMI). Overall, the results indicate that enteric CH4 emissions were effectively decreased with 3-NOP supplementation of a forage diet without affecting apparent total-tract digestibility of nutrients.

Influence of feed ingredients with pellet-binding properties on physical pellet quality, growth performance, carcass characteristics and nutrient retention in broiler chickens

2019 ◽  
Vol 59 (1) ◽  
pp. 73 ◽  
Author(s):  
Arash Moradi ◽  
Soudabeh Moradi ◽  
M. Reza Abdollahi
Keyword(s):  
Growth Performance ◽  
Control Diet ◽  
Wheat Gluten ◽  
Carcass Characteristics ◽  
Nutrient Retention ◽  
Heart Weight ◽  
Pellet Quality ◽  
Crude Fibre ◽  
Sodium Bentonite ◽  
Pellet Diameter

The influence of inclusion of pellet binder on physical pellet quality, growth performance, carcass characteristics and total tract apparent retention of nutrients was examined. Broiler starter (Days 1–21, pellet diameter: 2.5 mm) and finisher (Days 22–42, pellet diameter: 4 mm) diets were formulated and then allocated to one of the seven treatments including control diet, and diets including sodium bentonite (10 and 20 g/kg), wheat gluten (10 and 20 g/kg) and wheat (100 and 200 g/kg). All ingredients used as a pellet binder significantly (P &lt; 0.05) increased the pellet-durability index compared with control diet. Wheat gluten and wheat at both inclusion rates were significantly (P &lt; 0.05) more efficient than was sodium bentonite in improving pellet hardness. From Day 1 to Day 42, chickens fed 10 g/kg wheat gluten and 100 and 200 g/kg wheat gained significantly (P &lt; 0.05) more weight than did control. During starters, birds fed 200 g/kg wheat showed the highest feed intake (P &lt; 0.05). On Day 42, all the pellet binders resulted in a heavier heart weight than in the control (P &lt; 0.05). At Day 21, the length of ileum was significantly (P &lt; 0.05) higher in birds fed 10 and 20 g/kg sodium bentonite, 10 g/kg wheat gluten and 200 g/kg wheat, but at Day 42, it was greater in birds fed 20 g/kg wheat gluten and 200 g/kg wheat than in those fed the control diet. Inclusion of wheat gluten (10 and 20 g/kg) and wheat (100 and 200 g/kg) increased (P &lt; 0.05) fat apparent retention. Birds fed 20 g/kg wheat gluten had a significantly (P &lt; 0.05) higher total tract apparent retention of crude fibre, also calcium apparent retention improved by wheat gluten inclusion at concentrations of 10 and 20 g/kg compared with control (P &lt; 0.05). Overall, inclusion of 10 g/kg wheat gluten, and 100 and 200 g/kg of wheat improved physical pellet quality and weight gain in broilers.

Supplements containing Acacia karroo foliage reduce nematode burdens in Nguni and crossbred cattle

2009 ◽  
Vol 49 (8) ◽  
pp. 646 ◽  
Author(s):  
V. Xhomfulana ◽  
C. Mapiye ◽  
M. Chimonyo ◽  
M. C. Marufu
Keyword(s):  
Control Diet ◽  
Average Daily Gain ◽  
Crossbred Cattle ◽  
Leaf Meal ◽  
Acacia Karroo ◽  
Natural Pasture ◽  
Nguni Cattle ◽  
Sunflower Cake ◽  
Dietary Treatments ◽  
And Control

The objective of this study was to compare nematode worm burdens in Nguni and crossbred cattle supplemented with Acacia karroo leaf meal. Eighteen Nguni (274.4 ± 17.34 kg) and 12 crossbred (230.5 ± 14.62 kg) steers aged 19 months were allocated to three dietary treatments: A. karroo leaf meal, sunflower cake and control with no supplement. Steers in all the treatments grazed on natural pasture whereas those on A. karroo leaf meal and sunflower cake diets were given an additional 1.5 kg and 650 g of feed, respectively, to supply 150 g of protein per day for 60 days. Faecal samples collected from the steers’ recta every fortnight were examined for nematode egg types using the modified McMaster technique. At slaughter, the abomasa and intestines were collected, opened and washed for worm identification. Nguni steers supplemented with the A. karroo leaf meal diet had the lowest mean strongyles egg counts and mean total egg counts (P < 0.05). Steers that received the A. karroo leaf meal and sunflower cake diets had lower Haemonchus contortus and Oesophagostomum colombianum worm burdens than those that received the control diet (P < 0.05). Mean strongyles and Strongyloides egg counts, and H. contortus and Oes. colombianum worm counts were negatively correlated with average daily gain and body condition scores (P < 0.05). Generally, Nguni cattle supplemented with A. karroo leaf meal had the lowest egg loads and worm burdens. It was concluded that supplementing cattle with A. karroo could reduce nematode burdens.

Sesbania Leaves as Sole Feed for Growing Black Bengal Boats

1994 ◽  
Vol 1994 ◽  
pp. 133-133
Author(s):  
Md Shahjaiai ◽  
K J Khan ◽  
M A Akbar ◽  
A M M Tareque ◽  
H Galbraith
Keyword(s):  
Crude Protein ◽  
Nutritional Value ◽  
Block Design ◽  
Nutrient Utilization ◽  
Control Group ◽  
Crude Fibre ◽  
Sesbania Aculeata ◽  
Group A ◽  
Dietary Treatments ◽  
Effect Of Feeding

Sesbania, a tropical legume browse, provides green foliage high in crude protein and low in crude fibre (Sen, Ray and Ranjhan, 1978). In Bangladesh two varieties of sesbania, Sesbania aculeata and a recently introduced African Sesbania rostrata are largely cultivated for green manuring in agricultural fields during kharif season. The leaves of sesbania may be used as good source of protein to supplement protein-poor roughages in ruminants diets. However, there is an extreme paucity of information on its nutritional value for goats. An attempt was therefore made to study the effect of feeding sesbania leaves as sole feed on growth performance and nutrient utilization in growing Black Bengal goats.Nine Black Bengal male castrated goats aged about 5 months and weighing 9.0 kg on average initially were used in a 56 day study.The goats were housed individually in a slatted floor and were introduced to the experimental feed over a period of 2 weeks.The animals were allocated at random to one of three dietary treatments in a randomised block design according to live weight.The control group A given road-side grass and the groups B and C offered green leaves of Sesbania aculeata and Sesbania rostrata, respectively.

Effect of Substituting Poultry Waste Meal for Corn in the Diet of the African Clariid Catfish, Clarias gariepinus (Burchell 1822) Juveniles

2019 ◽  
pp. 1-7
Author(s):  
Obe, Bernadine Wuraola
Keyword(s):  
Clarias Gariepinus ◽  
Nutrient Utilization ◽  
Proximate Analysis ◽  
Average Weight ◽  
Poultry Waste ◽  
Crude Fibre ◽  
Substitution Level ◽  
Inclusion Level ◽  
C 50 ◽  
The Cost

The objective of this study was to evaluate the effect of poultry waste meal (PWM) on growth of Clarias gariepinus juveniles The growth response of juveniles of average weight 6.5g fed poultry waste meal (PWM) was studied for 70 days. The poultry waste meal comprised the droppings from the layers pen, some maggots, broken eggs and feeds that fell during the course of feeding. The proximate analysis of PWM had crude protein value of 9.795 %, crude fibre 8.700 %, ash 25.174 %, moisture 10.794%, carbohydrate 44.286% and fat 1.250% respectively. Five diets were formulated; which were Diet A (Control: with 0% inclusion level of poultry waste meal, B (25%), C (50%), D (75%),  and E with 100% inclusion level (total replacement with poultry waste meal). There were no significant differences (p>0.05) between the control and all other diets in the values recorded for growth and nutrient utilization, even up to 100% substitution of maize with PWM. The cost of feed production decreased with increase in inclusion levels of PWM in the diets. The results of the study showed that the use of PWM could be considered in the diet of C. gariepinus even up to 100% substitution level; considering the huge cost of maize and competition for its use whereas PMW is obtainable at little or no cost.

Rumen biohydrogenation of n-3 polyunsaturated fatty acids and their effects on microbial efficiency and nutrient digestibility in sheep

2000 ◽  
Vol 135 (4) ◽  
pp. 419-428 ◽  
Author(s):  
A. M. WACHIRA ◽  
L. A. SINCLAIR ◽  
R. G. WILKINSON ◽  
K. HALLETT ◽  
M. ENSER ◽  
...  
Keyword(s):  
Fatty Acids ◽  
Fatty Acid ◽  
Fish Oil ◽  
Control Diet ◽  
Saturated Fatty Acids ◽  
Latin Square ◽  
Nutrient Digestibility ◽  
Microbial Efficiency ◽  
Dietary Treatments ◽  
Different Sources

The study examined the extent to which n-3 PUFA from different sources were biohydrogenated in the rumen and their effects on rumen microbial efficiency and whole tract nutrient digestibility. Four ruminally and duodenally cannulated wether lambs were used in a 4×4 Latin square design. Four iso-energetic and iso-nitrogenous diets based on dried grass were formulated to provide similar fat levels (60g/kg DM) from different sources; Megalac (palmitic acid: C16:0; Control), whole linseed (α-linolenic acid, C18:3n-3 ; Linseed) fish oil (eicosapentaenoic acid, C20:5n-3, EPA and docosahexaenoic acids C22:6n-3, DHA; Fish oil) and whole linseed plus fish oil providing equal amounts of oil (LinFish). Diets were offered at a rate of 1·2kg/day in 12 equal portions.Total fatty acid intake was similar on all diets whilst duodenal fatty acid flow varied between 101, 94, 87 and 90% of dietary intake for animals fed the Control, Linseed, Fish oil and Linfish diets respectively. Duodenal flow of C18:3 n-3 in animals fed the Linseed diet was twice that of animals fed the Control diet (P < 0·01) whilst animals fed the Fish oil diet had a significantly greater flow of EPA and DHA than those fed any of the other dietary treatments. Duodenal flow of trans C18:1 in animals fed the Linfish diet was significantly greater than that in animals fed either Linseed, Fish oil or Control diets (P < 0·001). Biohydrogenation of C18:3n-3 was 80 to 93% in all diets whilst that of C20:5n-3 and C22:6n-3 was 72 to 79% in diets that contained fish oil or linseed and fish oil. Apparent fatty acid digestibility (duodenum to rectum) tended to be greater for unsaturated than saturated fatty acids whilst whole tract fatty acid digestibility (mouth to rectum) was significantly greater in animals fed diets containing fish oil (P0·05). All dietary n-3 PUFA sources decreased microbial protein synthesis and efficiency when expressed as either gN/kg organic matter (OM) apparently or truly degraded in the rumen. Additionally, the inclusion of fish oil increased the proportion of propionate in the rumen whilst depressing the rumen digestibility of OM and fibre (P < 0·01), but had no significant effect on whole tract OM or fibre digestibility.

Sign in / Sign up

Export Citation Format

Share Document