Grodziec Slaski Ltd.

Grodziec, Poland

Grodziec Slaski Ltd.

Grodziec, Poland

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Rekiel A.,Warsaw University of Life Sciences | Wiecek J.,Warsaw University of Life Sciences | Wojtasik M.,Warsaw University of Life Sciences | Wojtasik M.,Polish Academy of Sciences | And 3 more authors.
Annals of Animal Science | Year: 2012

The aim of the study was to determine the effect of sex ratio in the litter in which Polish Large White (PLW) and Polish Landrace (PL) sows were bor n on the number of piglets born and reared to 21 days of age. Results obtained in nucleus herds from one breeding region were analysed. A total of 518 multiparous sows (179 PLW and 339 PL) were evaluated based on data from their litters (790 PLW and 1540 PL litters). The proportion of females in the litter in which the sow was born served as a basis for dividing the females into groups: group 1 <40%, group 2 - 40-50%, group 3 - 50-60%, group 4 - 60-70%, group 5 >70%. Significant differences in the average number of piglets born were found between the groups for PLW sows; compared to sows from groups 1, 2 and 3, females from group 5 gave birth to 8.0% (P≤0.05), 9.4% (P≤0.01) and 6.6% more piglets (P≤0.01), respectively, and compared to sows from group 2, those from group 4 gave birth to 5.1% more piglets (P≤0.05). The average number of piglets born and reared to 21 days by PL sows did not differ significantly between groups. The greater the proportion of females in the litter in which the PLW sow was born, the greater the preweaning mortality of piglets: 0.79, 0.87, 0.99, 1.02 and 1.24 piglets in groups 1 to 5, respectively. Preweaning mortality of PL piglets (0.93, 0.89, 0.81, 0.76 and 0.65 in groups 1 to 5, respectively) decreased with increasing proportion of females in the litter of origin and was lower than that of PLW piglets. It seems appropriate to account for the sex ratio of the litter in which the gilts wese born when selecting them as mothers of the next generation as part of herd replacement; this parameter may improve fertility and production efficiency.


Hanczakowska E.,National Research Institute of Animal Production | Weglarzy K.,Grodziec Slaski Ltd. | Szymczyk B.,National Research Institute of Animal Production | Hanczakowski P.,National Research Institute of Animal Production
Annals of Animal Science | Year: 2010

The effect of crude or refined glycerol on performance, carcass and meat quality was studied in 30 pigs weighing about 30 kg at the beginning of the experiment. Animals were kept and fed individually with a standard mixture supplemented with 10% of crude or refined glycerol, a byproduct from biodiesel production. Pigs were slaughtered at about 110 kg of body weight and their carcasses were analysed. Meat acidity, colour and water holding capacity were determined in samples of longissimus muscle. Digestibility of nutrients was evaluated on the other 30 fatteners. Crude glycerol reduced the weight gains of animals, with no significant differences in the case of refined glycerol. Mean body weight gains of control pigs and those fed crude or refined glycerol were 826, 776 and 808 g, respectively. There were no significant differences in feed conversion between the groups. Pigs fed crude glycerol had thinnest backfat and largest loin eye area. Refined glycerol significantly improved digestibility of fibre. Both glycerols significantly increased water holding capacity. It is concluded that crude glycerol has limited value as a feed supplement for pigs.


Hanczakowska E.,National Research Institute of Animal Production | Weglarzy K.,Grodziec Slaski Ltd | Bereza M.,Grodziec Slaski Ltd
Annals of Animal Science | Year: 2012

The possibility of replacing soybean meal with rapeseed press cake (RPC) in feed was determined over two reproductive cycles in an experiment with 54 pregnant and lactating sows allocated to three groups with 18 gilts per group. Group I received the standard mixture, group II received RPC as the main protein source from insemination to 100 days of pregnancy, and the control diet during late pregnancy and lactation. In group III, RPC replaced all of soybean meal protein in early pregnancy and one-half of soybean meal protein during late pregnancy and lactation. Half of the sows in each group received a iodine supplement (1 mg/kg feed). Sows were weighed at mating, farrowing and weaning. Piglets were weighed at 1 and 28 days of age (weaning). Samples of milk were collected at 14 days postpartum to determine the content of protein, fat, lactose and iodine. After the first reproductive cycle sows were mated and allocated to the respective groups as in the first cycle. Neither RPC nor iodine had any effect on body weight of the sows. RPC had a beneficial effect on body weight of piglets at birth and weaning, which could be due to a higher content of fat and amino acids in sow RPC diets. RPC, especially when given throughout pregnancy and lactation significantly lowered iodine content in sow milk. Piglets grew significantly faster in the second compared to the first reproductive cycle (184 and 178 g per day, respectively). Iodine supplemented to sows reduced piglet daily weight gain from 185 to 177 g. It is concluded that rapeseed press cake can replace soybean meal in the diets for pregnant and lactating sows without a negative effect on their performance while improving piglet body weight.


Hanczakowska E.,National Research Institute of Animal Production | Niwinska B.,National Research Institute of Animal Production | Grela E.R.,Lublin University of Life Sciences | Weglarzy K.,Grodziec Slaski Ltd. | Okon K.,Jagiellonian University
Czech Journal of Animal Science | Year: 2014

The effect of feed supplementing with glutamine, glucose and/or sodium butyrate was estimated on 156 piglets. The after-effect of supplements on fattener performance, carcass traits, and meat quality was examined. Piglets were allocated to 5 groups and fed standard feed mixture alone (control - C) or supplemented with 10 g of l-glutamine, or 10 g of glucose, or 3 g of sodium butyrate per kg of diet or all of these compounds (groups GT, GC, SB, and GT+GC+SB, respectively). Six piglets from each group were slaughtered at 63 days of age, their intestines were prepared and their parts measured. Digesta from ileum and caecum was taken for analysis. Its acidity and volatile fatty acids content were evaluated. Morphological structure of duodenal and ileal epithelium was estimated. After 84 days of age 20 animals from each group were fed the standard mixture. After 100 days of fattening 8 pigs from each group were slaughtered, pH of meat was measured, and samples of the longissimus muscle were taken for analysis. Body weight gains of piglets fed diets supplemented with SB or all supplements were higher than those of controls. All supplements given together increased total intestinal weight and length. Epithelial villi in jejunum were the highest in piglets receiving all supplements. Their height in the duodenum ranged from 296 to 347 μm and in the jejunum they were higher: 336-424 μm. After 100 days of fattening body weight of all experimental animals was higher than that of control. There was no significant difference in carcass and meat quality. Sodium butyrate added to the diet improved piglet performance probably due to changes in intestine development and in intestinal epithelium structure. This positive effect was enhanced to some extent by the addition of glutamine or glucose.

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