Effect of a Rotational Grazing System on Nematode Infection of Sheep

Smeal, M. G.; Farleigh, E. A.; Major, GW

doi:10.1111/j.1751-0813.1969.tb16089.x

Cited by 4 publications

(1 citation statement)

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“…However, experimental evidence has shown no difference in parasite infection levels between rotational and continuous grazing systems (Smeal et al, 1969;Goldberg and Lucker, 1969). Climatic conditions such as precipitation, temperature, and humidity can largely affect the survival of parasites distributed on the pasture (Wheeler, 1962).…”

Section: Rotational Grazing Experimentationmentioning

confidence: 99%

Comparison of buffered grazing systems for beef cattle

Wolfe¹

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To evaluate the productivity of a rotational versus continuous grazing system for beef production within a buffer grazing system, thirty crossbred beef cows and their calves were grouped by weight and randomly assigned to one of the two grazing systems replicated twice over three years at the initiation of each grazing season. Each replication of the rotational system was stocked with 8 cow/calf pairs (2.45 cow/calf units/ha pasture and buffer) while the continuous system was stocked with 7 cow/calf pairs (2.1 cow/calf units/ha pasture and buffer). The grazing season was divided into 3 periods to aid in analysis. Period 1 (spring grazing) included the time between grazing initiation until buffer grazing began, period 2 ran from the beginning of buffer grazing until the middle to the end of August, and period three ran from the middle to the end of August until weaning. The period 1 and before buffers were grazed was divided into grazing cycles consisting of 4 weeks each. Pasture height was not different (P>0.10) between systems when averaged over year, however there were differences due to year (P<0.059). Pasture height also decreased (P<0.001) over the periods of the grazing season. There was a year x period interaction (P<0.009) concerning pasture growth. Growth rate during 1995 was 14 kg DM/ha/d during period 1 than the growth rate for period 1 during 1996. Growth rate during periods 2 and 3 of 1996 exceeded the rate in 1995 by 3 kg DM/ha/d and 14 kg DM/ha/d respectively for the same period. Pasture growth during cycle I (weeks 1-4) was found to be higher (P<0.080) on the continuous as opposed to the rotational grazed buffer system. No differences (P>0.10) were found between system or years when green herbage mass was considered. Total herbage mass was not different between systems although differences were observed (P<0.094) between years. Year influenced the proportion of legumes (P<0.001), weeds (P<0.075), and dead material (P<0.035) during weekly cycle I of the grazing season. Change in individual cow weight was not different (P>0.10), however, cow weights did differ (P<0.021) between years at weaning. Although there was no difference between systems regarding individual calf gain (P>0.10), there was a difference (P<0.001) between systems when total gain per treatment was considered with higher gains on the rotational system. The difference seen in total weight gain was due to the extra calf carried on the rotational system.

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Section: Rotational Grazing Experimentationmentioning

confidence: 99%