Abstract

JAIME, George Oneiber; CARULLA, Juan Evangelista  and  WILLS-FRANCO, Gustavo Álvaro. Chemical characterization, ruminal degradability and bovine acceptability of a byproduct of the paper industry. rev.udcaactual.divulg.cient. [online]. 2021, vol.24, n.1, e1204.  Epub Apr 21, 2021. ISSN 0123-4226.  https://doi.org/10.31910/rudca.v24.n1.2021.1204.

Climatic variations can limit the availability and quality forages. The use of byproducts of the paper industry (BPI) was studied as part of cattle rations. Twelve samples of BPI were analyzed to determine the nutritional composition and ruminal degradability. The acceptability (1.07kg DM) of the BPI was evaluated in 12 Holstein heifers, assigned to two Latin squares with two replicates and three treatments each. The first square, the treatments were BPI alone (T1), BPI +glycerol (T2) and BPI +molasses (T3). In the second square, treatments were BPI +commercial supplement (CS) (T4), BPI +CS +glycerol (T5) and BPI + CS + molasses (T6). The BPI presented low CP (1.5±0.14%), high levels of NDF (59.6±6.17%) and ash (53.3±1.98%) and médium IVODM (47.7±5.8%). Concentrations of P (0.045±0.06%) and K (0.023±0.03%) were low while Ca (13.5±0.8%), Cu (63.9±11.5ppm) and Fe (1365±189ppm) high. Rate of DM disappearance for BPI was 11.8%*h-1, soluble fraction ( a ) 14% and a potentially degradable fraction but not soluble ( b ) 46.6%. The acceptability of BPI was higher when fed in mix (T1 vs T2-T3; p<0.05) and with concentrate and molasses (T4-T5 vs T6; p<0.05). Variation in nutritional composition of BPI was low for most and its nutritional quality low due to a moderate digestibility, a low CP and high ash. In addition, its acceptability was low but improved when supplied with the use of palatability agents and CS.

Keywords : Acceptability; in vitro digestibility; Ruminal degradability; Byproduct; Paper.

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