Foraging behaviour of beef cattle in the hilly terrain of a Mediterranean grassland
Z. Henkin A D , E. D. Ungar B and A. Dolev C
+ Author Affiliations
- Author Affiliations
A Beef Cattle Section, Newe-Ya’ar Research Centre, Department of Natural Resources, Agricultural Research Organisation, PO Box 1021, Ramat Yishay 30095, Israel.
B Department of Natural Resources, Agricultural Research Organisation – The Volcani Centre, PO Box 6, Bet Dagan 50250, Israel.
C MIGAL – Galilee Technological Centre, Kiryat Shemona, PO Box 831, Kiryat Shmona 11016, Israel.
D Corresponding author. Email: henkinz@volcani.agri.gov.il
The Rangeland Journal 34(2) 163-172 https://doi.org/10.1071/RJ11096
Submitted: 27 December 2011 Accepted: 21 March 2012 Published: 1 June 2012
Abstract
The objective of this study was to determine the role of terrain in the foraging behaviour of beef cows grazing hilly Mediterranean grasslands. The study was conducted in eastern Galilee, Israel, during 2002 and 2003 on two similar 28-ha paddocks encompassing distinct terrain types in terms of slope and rock cover. The paddocks were continuously grazed by cows from mid winter (January–February) to autumn (September) at two different stocking rates (1.1 and 0.56 cows per ha). From early June to the end of September the cows were offered poultry litter ad libitum as a supplementary feed. The location and activity of cows were monitored with GPS collars during four periods in each year: early spring (February–March), late spring (April), early summer (June) and late summer (August). Herbage mass was measured at the beginning of each of these periods. During early and late spring, when the herbage mass and nutritive value of herbage were high, the cows spent 40–50% of the day grazing, with peaks in the morning and afternoon. In the dry, late summer period (August), grazing of the herbage was 20–22% of the day, occurring only in the early morning and late afternoon with sporadic bouts of grazing until midnight. In all periods the cows tended to prefer the flattest terrain sites. As the herbage mass declined to 1000–1500 kg ha–1, the exploitation of the pasture during grazing became increasingly similar among the different terrains. Even on relatively small paddocks, where grazing pressure was close to the full potential of the site, free-ranging cows tended to prefer less sloping and rocky sites. It is concluded that the grazing strategy of beef cows is determined by the interaction between terrain, the distribution of the herbage mass and the nutritive value of the herbage. As herbage mass declines during the growing season, the distribution of grazing becomes uniform and all terrain types are exploited.
Additional keywords: cattle activity, cattle spatial distribution, Geographic Information System, Global Positioning System, herbage mass.
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