Agris category codes: L02, L50
COBISS Code           1.08
Language: English

INFLUENCE OF ACORN INTAKE ON BLOOD LIPID PROFILE AND LONGISIMUS MUSCLE CHARACTERISTICS OF BLACK SLAVONIAN PIG

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^a) Univ. of Zagreb, Fac. of Agriculture, Dept. of Animal Science, Svetošimunska c. 25, HR-10000 Zagreb, Croatia

ABSTRACT
The beneficial effect of acorn on blood lipid level could be linked with presence of both high tannin content (70.10 g/kg DM) and high amounts of unsaturated fatty acids (more than 80%) such as linoleic (43.38%), oleic (30.52%) and alpha linolenic (4.58%) acid. In this study the influence of ad libitum acorn intake on blood lipid profile and longissimus muscle (MLD) composition of Black Slavonian pig were investigated and compared with the effects of commercial corn based diet. Acorn consumption in last three weeks of fattening period had a decreasing effect on triglyceride and total cholesterol concentration in blood without adverse effect on liver function. Compared with the intake of corn based diet, the intake of acorn resulted in 11% (0.22 mmol/l) lower total cholesterol (P < 0.05) concentration and 48% lower (0.20 mmol/l) triglycerides concentration (P < 0.01). In addition, there was no observed statistically significant differences (P > 0.05) among finishing diets for any histochemical characteristics, except for diameter of intermediate fast-twitch oxidative-glycolytic (FOG) fiber types (58.10 μm and 51.67 μm in acorn and corn based fed pigs, respectively; P < 0.01). The trend toward lower proportion (10.80 vs. 12.36%) and smaller diameter (59.36 vs. 64.57%) of red slow-twitch oxidative (SO) fiber types (P < 0.08) was observed in acorn than in corn-based fed pigs.

EFFECT OF DIETARY PROTEIN/ENERGY COMBINATIONS ON MALE BROILER BREEDER PERFORMANCE

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Faculty of agriculture, Trg sv. Trojstva 3, HR-31000 Osijek, Croatia

ABSTRACT
A study was conducted to evaluate the effect of crude protein level and low energy supply on broiler production parameters. Three hundred Ross 308-day-old male broiler chicks were divided in three basic groups and placed in three separate pens littered with wood shavings. Treatments consisted of a control diet (220 g/kg CP), the second diet with a crude protein diet (205 g/kg CP), and the third one with a crude protein diet (190 g/kg CP) with the same ratio 1: 573–575 KJ/kg crude protein and ME in starter (first 21 days). Finisher (22 day till end) control diet consisted of 200 g/kg CP, the second diet consisted of 185 g/kg CP, and the third one of 170 g/kg CP, with the ratio 1: 649–650 KJ/kg crude protein and ME. Feed intake tended to decrease with increasing the crude protein and energy. Feed conversion (g gain per g feed) improved as crude protein and energy increased. Muscle amount in groups K and P₁ was statistically much higher (P < 0.01) than in group P₂. Concentration of biochemical indicators showed less organism strain in groups fed on blends with less crude protein and energy.

Agris category codes: L02
COBISS Code           1.08
Language: English

THE EFFECT OF TANNINS PARTLY BOUNDED ON PROTEINS ON PRODUCTION AND SLAUGHTER PARAMETERS IN GROWING RABBITS

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Univ. of Ljubljana, Biotechnical Fac., Dept. of Animal Science, Groblje 3, SI-1230 Domžale, Slovenia

ABSTRACT
Production traits of 144 rabbits (104 male and 40 female) of Slovene sire SIKA line were recorded from weaning (31 days of age) to slaughter (73 days). Rabbits were allotted to 5 groups in two trials: control, F-0.3 (added 0.3% of Famatan®), TA-0.19 (added 0.19% of TA), TA-0.25 (added 0.25% of TA) and TA-0.5 (added 0.5% of TA). TA preparation is experimentally produced by Tanin Sevnica d.o.o. in extraction procedure of their commercial product Farmatan® (water extract from sweet chestnut (Castanea sativa Mill.) wood), where only a part of tannins was bounded by whey proteins. Statistical analysis was performed by SAS statistical package (SAS, 1999) with GLM procedure. The addition of 0.5% TA (TA-0.5) increased feed intake and weight gain during the most critical period (3 weeks after weaning) in comparison with Control group. The addition of 0.25% of TA (group TA-0.25) increased weight gain and live weight of rabbits during the entire trial in comparison with Control group. There were no differences between groups in feed intake and FCR during the entire trial. Rabbits from all groups with added TA (TA-0.19, TA-0.25 and TA-0.5) had significantly higher proportion of liver than Control rabbits. This can indicate higher burdening of liver where TA was added, but this influence has to be examined on greater number of experimental animals. The influence of added tannins (Farmatan® or TA) on other slaughter parameters was not explicit.

Agris category codes: M12
COBISS Code           1.08
Language: English

EFFECT OF DIETARY EE/NFE RATIO ON SENSORIAL TRAITS OF SHI DRUM

Severino SEGaTO ^a), Luca FASOLATO, Stefania BALZAn, Carla Azzurra ELIA, Enrico NOVeLLi and Igino ANDRIGHETTO

^a) Dept. of Animal Science, Padova University, Agripolis, Viale dell’Università, 16, 35020 Legnaro (PD), Italy

ABSTRACT
A four months growth trial was carried out in order to evaluate the quality traits of juvenile shi drum (Umbrina cirrosa) fed two isonitrogenous and isoenergetic diets having a different EE/NFE ratio (LOW, 0.7 vs. HIGH, 1.1). Compared to HIGH diet, LOW one was formulated increasing the replacement of fish oil with cereal products and soybean meal. At the end of the feeding trial (2 replicate per dietary treatment), 26 fish for each thesis were sorted according to live weight and submitted to chemical and sensorial analysis. Dietary treatments showed similar productive performance. The relative high inclusion of carbohydrates in substitution of lipids did not affect proximate composition of whole body and dorsal fillet. Among sensorial traits, LOW diet-fed fish evidenced a significant lower trunk exudation and fillet lightness. Results of this research showed that shi drum is a suitable candidate for Mediterranean marine aquaculture and its dietary formulation might include at least the NFE amount tested in this trial.

Agris category codes: L02, Q04
COBISS Code           1.08
Language: English

EFFECT OF DIFFERENT SOURCE OF OILS ON FATTY ACID PROFILE AND ORGANOLEPTIC TRAITS OF EGGS

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Josip Juraj Strossmayer University of Osijek, Faculty of Agriculture, Department for Specialized Zootechniques, Trg Sv. Trojstva 3, HR-31000 Osijek, Croatia

ABSTRACT
The study was aimed at assessing effects of oils supplemented to layer diets on fatty acid profile and organoleptic traits of eggs (aroma, taste, presence of admixtures and overall impression). Three groups of hens were fed diets that contained 5% of soybean oil (control group), 2.5% of fish oil and 2.5% of linseed oil (experimental group E1), and 2.5% of fish oil and 2.5% of rapeseed oil (experimental group E2). After a 28-day production, samples of diets and five eggs were taken from each group for determination of fatty acids. For the purpose of assessing sensory traits of eggs, panelists graded aroma, taste, admixtures and overall impression with grades from 1 (bad) to 3 (good). The control group contained significantly more (P < 0.05) linoleic acid (C18:2n-6, LA), arachidonic acid (C20:4n-6) and total n-6 PUFA than other groups. Egg yolks of the E1 group contained the most (P < 0.05) total MUFA. Egg yolks of the E2 group contained the most (P < 0.05) αLNA (C18:3n-3) and total n-3 PUFA. The best ratio of n-6/n-3 PUFA was determined in egg yolks of the E2 group, which was statistically better (P < 0.05) than in other groups. On average, eggs from all groups were given satisfactory grades referring to aroma, taste, admixtures and overall impression. However, panelists gave the best grade to eggs of the control group. These eggs were given statistically significantly better (P < 0.05) grade for overall impression than eggs from experimental groups.

Agris category codes: L50
COBISS Code           1.08
Language: English

EFFECT OF FEED PROCESSING ON IN SITU RUMINAL DEGRADATION OF CEREAL GRAINS AND ON THE DEGREE OF SYNCHRONY OF ORGANIC MATTER AND NITROGEN RELEASE IN THE RUMEN OF GRAZING LACTATING DAIRY COWS

Róbert TÓTHI ^a), Johannes PIJNENBURG and Seerp TAMMINGA

^a) Kaposvár University, Faculty of Animal Science, Department of Animal Nutrition, P.O. Box 16, H-7401 Kaposvár, Hungary

ABSTRACT
Three rumen-cannulated, lactating Holstein-Friesian cows grazed in a controlled experimental pasture and supplemented daily with concentrates were used to measure effects of different heat treatment of cereal grains (pelleted barley, toasted barley, pelleted maize, toasted maize) on in situ degradability of protein and starch and to estimate of the possible rumen synchrony after feeding processed cereal grains as a supplement to perennial ryegrass (Lolium perenne). Pressure toasting treatment increased (P < 0.05) the undegradable fraction of DM and OM and tended to reduce (P > 0.05) in situ protein degradability of the cereal grains. Undegraded intake protein increased (P > 0.05) after pressure toasting from 36.4 to 52.5% for barley and from 50.3 to 58.2% for maize, respectively. Undegraded intake starch increased (P > 0.05) from 14.9 to 16.7% after toasting barley and decreased from 36.1 to 31.3% for toasted maize, respectively. Pressure toasting reduced washable fractions of each cereal grains for both constituents. The fractional rate of degradation of starch increased in maize, but decreased in barley. From the calculated synhrony index which describes the synchrony of nitrogen and organic matter degradation in the rumen it appears that supplementing grass with processed cereal grains can alter microbial growth and efficiency of utilization of nutrients and results in a more synchronous substrate for the microbes.

Agris category codes: L02
COBISS Code           1.08
Language: English

COMPARISON OF YIELDS AND NUTRITIVE VALUE OF DIFFERENT SPRING GREEN FORAGE MIXTURES

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University of Kaposvár, Faculty of Animal Science, Department of Botany and Plant Production, Guba S. 40, H-7400 Kaposvár, Hungary

ABSTRACT
To achieve a more efficient system of green feeding it is necessary to introduce new field cropping species in ruminant nutrition as green forage is which nutritional value has not been exactly evaluated yet. In our researches we analysed the yields and nutritive value of different spring green forage mixtures. We concluded that green forage mixtures gave more green and crude protein yield than the average of the components, and the nutritive value of the mixtures was better than the components’ nutritive value. In the average of three years, the dry matter content in the mixtures was similar to each other at the start of flowering. In our research the measured dry matter content in mixtures was higher than pea mixed with sunflower from literature and pea mixed with oat. The difference between vetch mixed with oat and the analyzed pea and barley mixture was 29 g/kg. Pea can give almost the same crude protein yield level than pea with oat and pea with spring barley. Based on achieved results it can be concluded that pea was a reliable component with barley and oat even in extreme weather conditions and in spring mixtures with barley or oat, the vegetative types of pea are recommended as leguminous component instead of using the “traditional” vetches, with special regard to the crude protein content.

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University of Ljubljana Biotechnical Faculty