期刊名称：Science et changements planétaires / Sécheresse
印刷版ISSN：1147-7806
电子版ISSN：1777-5922
出版年度：2006
卷号：17
期号：1
页码：295-308
出版社：John Libbey Eurotext
摘要：Figures See all figures Author Victor R Squires PO Box 31, Magill 5072, Adelaide Australia Key words: rangelands, Australia, livestock, grazing, arid and semiarid zone Page(s) : 295-308 Published in: 2006 Australia is a large island continent (7.7x10 6 km 2) that extends over about 30° of latitude from a point at 11° below the equator to 39° S and across 40° of longitude (113° E to 153° E). The arid and semiarid regions occupy nearly 6 million square kilometres, of which nearly two thirds carry domestic stock for commercial grazing. Domestic grazing animal numbers in this vast region account for less than 13% of total sheep and 25% of total cattle numbers in Australia. Animal densities are very low throughout, but range from extremely low (0.5 stock unit/km 2) in the less fertile western half of the continent, to low (1-2 cattle units/km 2) in the more fertile eastern rangelands. Rangelands and the grazing systems are briefly described and the influence of climate on type and intensity of grazing is examined.
关键词：rangelands; Australia; livestock; grazing; arid and semiarid zone
