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1

Phosphorylation status of boar spermatozoa proteins during liquid storage at 5 degrees Celsius and 16 degrees Celsius

100%

Wysocki P. , Lecewicz A. , Strzezek J.

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tom 53

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nr Supplement 1

2

Effect of diets with different contents of sunflower meal without or with exogenous enzymes supplementation on gastrointestinal tract response of growing turkeys

88%

Juskiewicz J. , Jankowski J. , Lecewicz A. , Slominski B. , Zdunczyk Z.

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tom 19

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nr 3

EN

The present experiment was conducted to investigate the effect of a different dietary content of sunflower meal (SFM) and the efficiency of an non-starch polysaccharide (NSP)-degrading enzyme preparation on growth and gut function of young turkeys. A total of 1512 one-day-old male turkey poults were randomly assigned to 8 dietary treatments, with 7 pens per treatment and 27 birds per pen. Experimental diets with a different content of SFM (0, 7, 14 and 21%; SFM0, SFM7, SFM14 and SFM21 groups, respectively) were administered in two variants, with and without NSP-degrading enzymes (E+ and E0 treatments, respectively). Diets fed to the turkeys for 8 weeks were isonitrogenous and isocaloric, but they differed substantially with regard to crude fibre content (in average 2.98, 3.97, 4.64 and 5.64% in the SFM0, SFM7, SFM14 and SFM21 groups, respectively). The enzyme preparation applied to a diet caused a tendency towards lower ileal viscosity (P=0.099) and a significant decrease in caecal total volatile fatty acids concentration, despite of the observed increase in activities of bacterial α-glucosidase, α-galactosidase and β-galactosidase in the E+treatment. At the same time, two-way ANOVA revealed that following the dietary inclusion of SFM at the amount of 14 and 21%, a significant decrease was observed in final body weight, small intestine and caecal tissue mass, caecal digesta mass, as well as the rate of bacterial production of volatile fatty acids in the caeca. Such an effect was not recorded when SFM was applied at a dose of 7%. In conclusion, sunflower meal rich in crude fibre added at the level of 14-21% to a diet for growing turkeys may induce undesirable processes manifested in the decrease in relative mass of small intestine and caecal tissues, as well as potent inhibition of the fermentation processes in the caeca. Our study showed additionally that high fibre sunflower meal could be used at a dose of up to 7% without any adverse effects on the gastrointestinal physiology of the growing turkeys.

3

Response of the caecal micriflora of turkeys fed diets with a different content of high-fibre sunflower meal

75%

Mikulski D. , Juskiewicz J. , Skowronska A. , Sosnowska E. , Jankowski J. , Lecewicz A. , Zdunski Z.

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nr 1

4

Effects of diets with different contents of soybean alpha-galactosides and crude fibre on modification of duodenal microstructure and selected parameters of nutrient utilization in young turkeys

75%

Juskiewicz J. , Jankowski J. , Zdunczyk Z. , Lecewicz A. , Przybylska-Gornowicz B. , Zieba M.

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tom 12

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nr 4

EN

The aim of the present study was to assess the physiological response of growing turkeys’ duodenal surface to dietary replacement of a common dietary component – soybean meal (SBM) with a soy protein isolate (SPI), as this treatment was associated with almost complete removal of α-galactosides from the diet (from 2.44 to 0.15%). Additionally, the utilization of selected dietary ingredients upon dietary treatments was recorded. Effects of raffinose-family oligosaccharides were assessed as well in low- and high-fibre dietary environment (3.5 and 5.3% of crude fibre, respectively). This study revealed that the duodenal morphological parameters were differently affected by dietary treatments at different production stages, i.e. at 4 and 8 weeks of life. Although villus height/crypt depth ratio (VCR) was insignificantly decreased by high-α-galactoside treatment in younger 4-week birds, the presence of these oligosaccharides in the diet positively influenced the VCR index in 8-week turkeys. A similar tendency was observed when calcium retention was considered. Different contents of dietary crude fibre affected the physiological action of α-galactosides, including duodenal crypts depth and phosphorus retention in the 4-week birds, as well as duodenal goblet cells number and nitrogen utilization in the older turkeys. A high content of α-galactosides in the diet resulted in increased hydration of intestinal contents, but without a significant decline in the dry matter digestibility and utilization of nitrogen, calcium and phosphorus. Having in mind the development and physiology of the GIT, it may preliminary be concluded that in later production stages, total withdrawal of soybean α-galactosides from turkeys’ diets does not seem to be nutritionally advisable.