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Publication Date

1981

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The relationships among stocking rate, gain/animal, and gain/ha were compared on six grazed pastures. The experiment was established on an oxisol acrustox in Brazil. The pasture consisted of (1) jaraguagrass (J); (2) jaraguagrass plus legumes (J + L); (3) molassesgrass (M); (4) molassesgrass plus legumes (M + L); (5) pangolagrass (P); (6) Pangolagrass plus legumes (P + L); (7) mixture of grasses (jaragua, molasses, and pangola) plus legumes (JMP + L). Pasture of pangolagrass alone was discarded because of poor establishment. Four stocking rates were applied on each pasture, from 1.0 to 3.4 animals/ha. For all pastures, gains/animal decreased linearly (P < 0.05) with increasing stocking rate. No significant differences were found among the slopes of all the six linear regressions for each pasture, or among years. On the other hand, the adjusted means of the pastures of J, J + L, P + L, and JMP + L were significantly higher than those of the pastures of M and M + L. Live-weight gains were significantly related to pasture availability during the wet periods of 1975-1976 and 1976-1977 and during the dry period of 1976-1977. The highest stocking rates at which pastures ofJ,J + L, P, andJMP + L persisted for more than 5 years were 2.0, 1.4, 2.0, and 2.0 animals/ha, respectively. The experiment showed that some cultivated set-stocked pastures grazed at 2.0, animals/ha or less produced 5 times as much as the average of the region.

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Relation of Animal Production to Stocking Rate on Cultivated Pastures in Cerrados Areas of Brazil

The relationships among stocking rate, gain/animal, and gain/ha were compared on six grazed pastures. The experiment was established on an oxisol acrustox in Brazil. The pasture consisted of (1) jaraguagrass (J); (2) jaraguagrass plus legumes (J + L); (3) molassesgrass (M); (4) molassesgrass plus legumes (M + L); (5) pangolagrass (P); (6) Pangolagrass plus legumes (P + L); (7) mixture of grasses (jaragua, molasses, and pangola) plus legumes (JMP + L). Pasture of pangolagrass alone was discarded because of poor establishment. Four stocking rates were applied on each pasture, from 1.0 to 3.4 animals/ha. For all pastures, gains/animal decreased linearly (P < 0.05) with increasing stocking rate. No significant differences were found among the slopes of all the six linear regressions for each pasture, or among years. On the other hand, the adjusted means of the pastures of J, J + L, P + L, and JMP + L were significantly higher than those of the pastures of M and M + L. Live-weight gains were significantly related to pasture availability during the wet periods of 1975-1976 and 1976-1977 and during the dry period of 1976-1977. The highest stocking rates at which pastures ofJ,J + L, P, andJMP + L persisted for more than 5 years were 2.0, 1.4, 2.0, and 2.0 animals/ha, respectively. The experiment showed that some cultivated set-stocked pastures grazed at 2.0, animals/ha or less produced 5 times as much as the average of the region.