Zibil, S., Zanoniani, R., Bentancur, O., Ernst, O., Chilibroste, P.
Original Research Article,
This study aimed to determine the effect of controlling the intensity of defoliation (ID) on forage production and herbage disappearance in eight commercial farms, in a complete randomized block design. Two blocks were selected in each farm to compare, the grazing management routine of the farm (T0) vs. controlled management (T1, pre grazing height 15-20 cm and post grazing height 5-7 cm). Pre grazing sward height (SH), herbage mass (HM, kg DM ha-1) and daily growth rate (GR, kg DM ha-1 d-1) were determined. In average, SH was lower (p <0.05) in autumn (A) and winter (W) (15.5 ± 1.2 and 16.9 ± 1 cm) than in spring (Sp) and summer (Su) (19.8 ± 1.0 and 21.1 ± 1.2 cm). The same trend (p <0.05) followed HM (A: 1250 ± 164; W: 1476 ± 145; Sp: 1914 ± 140; Su: 2564 ± 167 kg DM ha-1).