Abstract

CASTILLO GALLEGOS, Epigmenio et al. Ingestive behavior of cows in a native grass/Arachis pintoi association in the humid tropic of Veracruz. Rev. mex. de cienc. pecuarias [online]. 2014, vol.5, n.4, pp.409-427. ISSN 2448-6698.

A study was conducted in the humid tropics of the state of Veracruz during the rainy season, in order to determine the effect of introducing the legume Arachis pintoi CIAT 17434 (AP) into a native pasture, upon the grazing ingestive behavior of cows. Treatments were the native pasture (PN, control) and PN associated with AP (PNA). A 1 d grazing/ 20 d recovery rotation and a stocking rate of 3.2 F1 (Holstein x Cebú) cows/ha were used. Significance was set at P<0.05. Means ± standard error are presented for PNA first and then for PN. There were differences in standing dry matter (kg/ha) before grazing (4,225 ± 212 vs 3,314 ± 212 kg/ha), and crude protein (15.1 ± 0.4 vs 10.6 ± 0.5) and digestible organic matter (OM) (67.6 ± 1.7 vs 64.1 ± 2.0 %) of oesophageal extrusa. Grazing time (min/24 h) was similar between treatments (367 ± 11 vs 380 ± 11), but ruminating time was not (291 ± 8 vs 379 ± 8). OM intake (kg OM/100 kg LW) calculated by Cr-in situ digestibility was similar between treatments (2.09 ± 0.11 vs 2.16 ± 0.11), while intakes calculated by ingestive behavior were different (1.54 ± 0.12 vs 2.02 ± 0.12). Saleable milk yield and milk intake by calf (kg/animal/d) were similar between treatments: 6.8 ± 0.4 vs 6.1 ± 0.4; and 4.4 ± 0.4 vs 3.8 ± 0.5, but total milk yield was different: 9.0 ± 0.6 vs 7.2 ± 0.6.

Keywords : Arachis pintoi; Ingestive behavior; Oesophageal extrusa; Nutritive quality.

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