Propastizal:a sustainable range management program for Rio Negro province (Argentina)
Rangelands in Argentina occupy approximately 1,6000,000 km2 that represent nearly 60％ of the continental territory of the country.The livestock industry dependent upon rangeland resources includes cattle (22,000,000 head), sheep (12,500,000 head), and goats (4,000,000 head) along with many species of native and introduced wildlife.In Rio Negro Province of northern Patagonia, rangelands occupy 203,000 km2 with a broad range of environments and extreme climatic conditions.This area has been described as a cool semi desert by Soriano (1983) with a wide range of annual precipitation.At the foot of the Andes, rainfall reaches nearly 4000 mm/year.Fifty km eastward, rainfall drops to 600 mm/year, and 100 km further east, rainfall is less than 250 mm/year.Strong prevailing west winds are common.Livestock breeding is the main industry where sheep (1,800,000 head),goats (176,000 head) and cattle (650,000 head) are the most important livestock enterprises.Nearly 77％ of all rangelands in this area are moderately to severely degraded ( Del Valle et al.2002 ).This reality affects range carrying capacity due to soil erosion and its direct negative effects on preferred forage species.This situation came about not only because of inadequate management of grazing animals, but also because of timber and brush clearing, and un‐managed fires.All of these factors contributed to an increase in rural poverty.
range management sustainability sheep industry propastizal Ovine Law
Siffredi,G. Migueles,N. Martinez Luque Bueno,J. Villablanca,M. Garin,E. Tejeda,E. Boggio,F. Ayesa,J. Giorgetti,H. Kr(o)pfl,A. Villasuso,N. Lini,R. Bassi ,T. Bolla ,D.
INTA EEA Bariloche,CP 8400 Bariloche,Argentina Ministerio de la Producciónde Rio Negro. ENTE de la Linea Sur Rio Negro. EEA Valle Inferior del Rio Negro (Convenio INTA-Provincia de Rio Negro). Ley Ovina en Rio Negro. Universidad Nacional del Comahue. Ministerio de la Producciónde la provincia de Buenos Aires (Chacra Experimental Patagones).
国际会议
呼和浩特
英文
2008-06-29（万方平台首次上网日期，不代表论文的发表时间）