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The aim of the study was to evaluate the effect of four crude protein (CP) levels supplemented with limiting amino acids in the broiler diets on broilers growth, feed conversion ratio (FCR) and carcass quality. Hybrid ROSS 308, 2640 chickens, were divided into four groups and they fed grower diets with 22; 20,8; 19,5 and 18% of crude protein. The experiment period lasted from 10 to 30 days of age. Starter and finisher diets were the same for all groups. Grower diets were optimized in digestible limiting amino acids (lysine, methionine, leucine, izoleucine, threonine, tryptofan a valine). The lowest growth intensity was observed in the broilers fed 18% CP (P<0.05) on the other side the highest weight was found in the group fed 19,5% CP (P<0.05). The best FCR was found at feeding 19,5% CP and the worst at feeding 18% CP (P<0.05). The carcass yield and breast yield was the highest in group fed 19,5% CP (P<0.05). The highest proportion of abdominal fat was found in group fed 18% CP (P<0.05). On the basis of the results we can recommend the level 19,5% crude protein in grower diets supplemented by limiting amino acids without negative effect on FCR and broiler growth.

The aim of this work was to assess the meat performance of hens and bulls of the Galloway breed and their crossbreeds from organic farming and their subsequent comparison with each other. Further comparing the yields of their JUT with the results of another six breeds of cattle that were behaving in a non-organic conventional manner.

This thesis deals with monitoring the feeding of whole grain wheat to broiler chickens and evaluation of the effects of this feeding on the performance parameters of chickens and quality carcass. The monitoring also included the development of the gastrointestinal tract - weight of gizzard and proventriculus, weight of mucous membrane of gizzard, weight the of tpancreas and the length of the small intestine. Experiment was performed on 570 pcs broiler chicken of Cobb 500 hybrids in the period from 10. - 35. day of age. After 10. day of age group number 1,3,5,7,9,11 were fed a granular mixture containing the whole grain of wheat and the group number 2,4,6,8,10,12 granular mixtures as a control experiment. The chickens accepted of feed mixtures: BR2 at the age of 10. - 21. day, BR3 at age of 22. - 28. day and BR4 at age of 28. - 35. day. Into 10. day od age eat all the chickens the same feed mixture BR1. Between the control and experimental group was not statistically significant difference in live weight of chickens. Statistically significant difference wasn't between these groups in feed conversion 10. and 18. day of age. In 25. day of age was statistically significantly (P<0,05) better feed consumption for chickens in the experimental group, on average, 1520,3 g/kg, compared to the control group with the value of the feed conversion 1573,2 g/kg. At the age of 31 days was not statistically significant difference between the experimental and control group and also in 35. day of age at the end of the fattening period. There wasn‘t also statistically significant difference in weight of JUT, weight of abdominal fat, weight of gizzard, weight of mucous membrane of gizzard, weight of proventriculus and weight of pancreas.While in the evaluation of the length of the small intestine have been found conclusive statistical (P<0.05) differences between control and experimental group. In the experimental group was smaller, the length of the small intestine, in averages the males 165.5 cm and females 166,3 cm, compared to the control group, when the males had an average length of the small intestine 173,8 cm and females 169,2 cm. In the evaluation of the influence of gender on the development of the gastrointestinal tract were noted in all parts of the higher statistical conclusive differences among the males. Based on the results we can recommend the feeding of whole grain wheat as part of a compound feed without conclusive effects on performance parameters and quality carcass.