Wplyw poziomu bialka w diecie na zmiany allometrycznych cech przewodu pokarmowego kurczat

• Autorzy: Wertelecki T , Jamroz D

Warianty tytułu

EN

The effect of protein level in diets on changes of allometric parameters of digestive tract in chickens

• Języki publikacji: PL

Abstrakty

PL

Redukcja koncentracji białka w mieszankach o 10 i 14% istotnie obniżyła masę ciała w 14 i 28 dniu życia kurcząt, spowodowała wzrost masy i długości dwunastnicy oraz jelita cienkiego szczególnie po 5-7 dniu życia, spowodowała wzrost masy mięśni piersiowych oraz ilości odkładanego tłuszczu w 28 dobie.

EN

In the three trials the reactions of young chickens (1-28 days) in allometric parameters of digestive system under differented protein content in mixtures were analysed. The concentration of crude protein in mixtures of each experimental group was: I - in starter 220 g·kg⁻¹ (200 g in grover), II - 200 g (180 g in grover) and III - 185 g (175 g). The four exogenous pure amino acids: lys, meth, thr and try were added to each mixtures and balanced in groups II and III to amount given to diet I. The experiments were differed with grain type and level in mixtures. In all mixtures the main protein sources was soys bean meal (Glycine Max. 46,5% CP). Metabolizable energy density was similar in all starter feed about 12.5 MJ·kg⁻¹ and in grover 13.1 MJ·kg⁻¹ . The premix used in mixtures starter/grover was without feed antibiotic, enzymes and amino cids, content only coccidiostatic. The length and weight of duodenum, small intestine and weight of gizzards, were estimated in 1, 3, 5, 7, 14 and 28 days of life in similar periods the body weight was estimated. The breast muscles and abdominal fat weight in body mass was registered in 14. and 28. days of life. The reduction level of crude protein in mixtures decreased body weight of chickens in 14. and 28. days of life (p≤0.05). Similar efect was observed in decrease of both gizzards weight, especially in 5, 7, 14 and 28 days (p≤0.05). The allometric parameters of duodenum was increased with reduction level of crude protein in mixtures in whole period (p≤0.05). But these parameters for small intestine was decreased to 3rd days of life and after the 7th days to 28. was increased (p<0.05). The reduction level of crude proetin with pure amino acids supplementation, especially lysine, has influenced the weight of breast muscles (increased tendency) and abdominal fat content in 4th weeks old chickens.

Słowa kluczowe

PL

pasze; przewod pokarmowy; kurczeta; zywienie zwierzat; poziom bialka; drob; masa jelit; dlugosc jelita

• Wydawca: -
• Czasopismo: Zeszyty Naukowe Akademii Rolniczej we Wrocławiu. Zootechnika
• Rocznik: 2004
• Tom: 52
• Opis fizyczny: s.275-281,tab.,bibliogr.

Twórcy

autor

Wertelecki T

• Katedra Żywienia Zwierząt i Paszoznawstwa, Akademia Rolnicza, Wroclaw

autor

Jamroz D

• Katedra Żywienia Zwierząt i Paszoznawstwa, Akademia Rolnicza, Wroclaw

Bibliografia

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