Presenter Information

J D. Josifovich, INTA
E Frutos, INTA

Publication Date

1993

Description

For any' pasture grazing area it is important lo know the relationship among the climatic parameters, rainfall and temperature, with carrying capacity and minimal gains. The availability of pasture to adjust stocking rates and make provisions for hay or supplementary feed needed for periods of shortage can be estimated from these data. Seven years of monthly rainfall and medium average temperature; and 25 years of forage digestibility and average daily gains were related to cattle i: carrying capacity; Analysis was made using the stepwise regression method. Carrying capacity was evaluated considering animal units (AU) for a 400 kg head gaining 0.5 kg/day. Animal gains were obtained from trials at PergaminoStatioil using Hereford and Aberdeen Angus steers. Average temperature, rainfall and digestibility explained 71 'ii of the variation ill carrying capacity, Rainfall bad.a negative1 effect on carrying capacity, : Average carrying capacity was 2,55 AU/ha, with a maximum of 3.32 AU in.spring and a minimum of 1.82 in winter. Average daily gaii1 was iiot correlated with climatic or digestibiliiy factors. Annual average daily gain was 0.462 kg/head, having a maximum of 0.843 kg/head in September and a minimum of 0.155 kg/head in May.

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Influence of Climatic Factors on Animal Production in the Humid Pampa of Argentina

For any' pasture grazing area it is important lo know the relationship among the climatic parameters, rainfall and temperature, with carrying capacity and minimal gains. The availability of pasture to adjust stocking rates and make provisions for hay or supplementary feed needed for periods of shortage can be estimated from these data. Seven years of monthly rainfall and medium average temperature; and 25 years of forage digestibility and average daily gains were related to cattle i: carrying capacity; Analysis was made using the stepwise regression method. Carrying capacity was evaluated considering animal units (AU) for a 400 kg head gaining 0.5 kg/day. Animal gains were obtained from trials at PergaminoStatioil using Hereford and Aberdeen Angus steers. Average temperature, rainfall and digestibility explained 71 'ii of the variation ill carrying capacity, Rainfall bad.a negative1 effect on carrying capacity, : Average carrying capacity was 2,55 AU/ha, with a maximum of 3.32 AU in.spring and a minimum of 1.82 in winter. Average daily gaii1 was iiot correlated with climatic or digestibiliiy factors. Annual average daily gain was 0.462 kg/head, having a maximum of 0.843 kg/head in September and a minimum of 0.155 kg/head in May.