| Autor: |
De Castro, Kélvia Jácome, Borges, Iran, Rocha Chaves Miotto, Fabrícia, Guimarães Pimentel, Patrícia, Primola Gomes, Silas, Rocha Moreira, Guilherme, Pereira Pinto, Andrea, Neuman Miranda Neiva, Jose |
| Zdroj: |
Revista Ciência Agronômica; 2024, Vol. 55, p1-8, 8p |
| Abstrakt: |
The aim of this study was to evaluate intake, digestibility and performance in dairy heifers fed diets containing increasing levels of babassu cake (0, 100, 200 and 300 g kg-1 dry matter - DM) as a substitute for sugarcane treated with calcium oxide. Twenty-four heifers with an initial mean weight of 190.8 ± 40.8 kg were used, distributed in a completely randomised design. The dry matter intake (DMI), neutral detergent fibre intake (NDFI) and acid detergent fibre intake (ADFI), as %BW and g BW-0.75, showed an increasing linear response. The organic matter intake (OMI) showed a linear increase of 40 g day-1, 0.017% BW and 0.66 g BW-0.75 for each 10 g kg-1 increase in babassu cake in the diet. The apparent digestibility of the dry matter (ADDM) and organic matter (ADOM) showed a quadratic response (P < 0.05), with a minimum of 493 g kg-1 DM for 150 g kg-1 DM and 526.5 g kg-1 DM for 320 g kg-1 DM as a substitute for the sugarcane, respectively. The final mean weight was not altered, presenting a value of 299.7 ± 45.5 kg. Daily weight gain (DWG) showed a quadratic response, with the highest value at a substitution level of 190 g kg-1 DM. The feed conversion rate of the DM was not aff ected by the addition of babassu cake, with an average of 4.6 ± 0.74 kg DM kg-1 in weight gain. Babassu cake can substitute hydrolysed sugarcane in heifer diets up to 300 g kg-1 DM, with the greatest weight gain seen at a substitution level of 190 g kg-1 DM. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Supplemental Index |
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