| Autor: |
Busato, K. C., Chizzotti, M. L., Rodrigues, R. T. S., Silva, T. S., Silva, I. F., Queiroz, M. A. A., Silva, K. T., Borges, J. C., Gois, G. C. |
| Předmět: |
|
| Zdroj: |
Tropical Agricultural Research; 2022, Vol. 33 Issue 3, p299-309, 11p |
| Abstrakt: |
This study aimed to evaluate intake, digestibility, ingestive behaviour, and growth performance of Boer × nondescript breed (NDG) F1, Canindé, and Moxotó kids subjected to three levels of feeding (ad libitum intake and restricted intake by 25 and 50%). The study used 45 noncastrated males, 15 animals from each genetic group, assigned to a 3 × 3 factorial arrangement, with five replicates of each genotypic group at each feeding level. There was an interaction (P<0.05) between genotype and feeding levels for intake, digestibility, and average daily gain (ADG). Boer × NDG F1 kids fed ad libitum had higher dry matter intake (g/day), average daily gain, and lower dry matter digestibility than the Canindé and Moxotó kids. Kids at the 50% restriction level had a longer rumination time per gram of dry matter ingested (0.76 min/g) compared to that fed ad libitum (0.29 min/g) and with 25% restriction (0.41 min/g, P<0.05). Boer × NDG F1 animals, when fed ad libitum, have high growth performance compared to Canindé and Moxotó. Thus, it can be inferred that in feedlot systems with unrestricted feeding and a higher proportion of concentrate than forage (above 50%) in the diet, the use of the Boer × NDG F1 kids is an alternative to increase meat production in the Brazilian semiarid region. When subjected to feed restriction, the growth performance of Boer crossbred kids is similar to that of indigenous breeds. Kids subjected to feed restriction have longer rumination time and higher digestibility coefficients than their counterparts. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
|
