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国内外畜牧业科技发展概况 被引量:2
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作者 刘庆权 张庆治 刘世新 《辽宁畜牧兽医》 2002年第2期32-34,共3页
在世界农业新技术革命到来之际,如何借助这场新技术革命推进我国农业科技总体水平的发展,赶超世界先进水平,是关系到21世纪我国农业发展的大事.
关键词 国内外 牧业 科技发展 畜物业资源 生产水平 科技含量
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Animal Production Systems in Algeria: Transformation and Tendencies in the Setif Area
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作者 Khaled Abbas 《Journal of Food Science and Engineering》 2012年第10期593-602,共10页
Algeria registers only 0.25 ha of agricultural surface per capita. This indicates very low agricultural capacities. Otherwise agricultural activities are concentrated in a narrow fringe of the Northern part of the cou... Algeria registers only 0.25 ha of agricultural surface per capita. This indicates very low agricultural capacities. Otherwise agricultural activities are concentrated in a narrow fringe of the Northern part of the country where the dominant climate is semi-arid with very irregular rainfalls. A majority of farms produces its main part of income from cereal crops--livestock association system. However, the diversity of the climate and the physical environment, on one hand, and the agricultural policies on the other hand, induce major transformations in this system. Transformations are also the result of a significant demographic growth in rural area. In this context, significant issues appear in term of resource's uses and systems' sustainability. To shed light in the actual situation, this study, based on a survey of 90 owners, shows that: the intensification can constitute a threat on the pastoral resources; the weakness of the farms encourages the generalization of practices characterised by a weak feed autonomy and a bad management of stock fodders; the animal interspecific integration and partial intensification are positive if they follow models which ensure autonomy, performance and optimal pastoral resource management. 展开更多
关键词 Algeria SEMI-ARID production system TRANSFORMATION animal production dairy cattle.
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