期刊名称：Archivos Latinoamericanos de Producción Animal
出版年度：2004
卷号：12
期号：01
页码：28-41
出版社：Latin American Association of Animal Production
摘要：Beef cattle production systems in Argentina are based on direct grazing. There are complex grazing subsystems within the beef cattle production systems that need to be differentiated in order to guide appropriate technological changes. The purpose of this work was: to identify a livestock farm (LF) typology; to link the resulting typology with characteristic of use of the land, activities included in the beef production process and geographical localization; and to propose indicators that can allow the characterization of the LF with the information of feed resources of own production from secondary data. This analysis included 1 252 LF of Buenos Aires' province. The variables of cattle requirements and production of resources were built using the data of the Agricultural National Survey 1999. The multivariate analysis allowed: (a) the general characterization of the LF, (b) to construct a typology, and (c) the description of groups and the comparison among them. Three technical levels of feeding were obtained: «The LF that supplement with own production», «The LF in grazing pasture» and «The LF in natural grassland grazing». The use of the land was mainly mixed (livestock and agricultural) within the LF of the first two subsystems and exclusively livestock in the third one. The beef cattle production activity that prevailed in the first subsystem was complete cycle (cows breeding and calf, steer rearing and fattening) and in the third one, cows breeding and calf with or without rearing. The indicator that better allowed a distinction between the three subsystems was the Net Index of Forage Production, while the Supplement of Own Production allowed the separation of the subsystem with more technical level. The use of both indicators is recommended for future classifications. In the three identified groups, the bigger knowledge of production dynamics and natural grasses quality, cultivated pastures and conserved forages, is needed for charge adequacy and production maximization, that is in order to a better forage efficiency.
