关键词: 传统农业系统, 从江田鱼, 青田田鱼, 形态分析, 遗传分析

Abstract: Taking the optimization of water-soil resources as an objective, the energy exchange and transfer resistance, and cost resistance spatial distribution of the watersoil resources in Shiyang River basin were analyzed according to the minimum accumulative resistance surface, the accumulative cost resistance model and the surface dissipative technology. The results showed that the ecological core sources of watersoil resources were river net, other water areas, croplands and construction lands. The maximum value of accumulative cost resistance was found in construction lands which had the biggest resistance to energy flow and transfer of ecosystems. In contrast, the river net had the minimum cost resistance. According to the configuration methods and division principles of water-soil resources, Shiyang River basin was divided into five types, i.e., the key areas to be optimized, areas waiting for configuration optimization, the importantly concerned areas, concerned areas, and ecological improvement and conservation areas. The key areas to be optimized are mainly distributed in Minqin and Wuwei oases that carry more than 85% of towns and population. Some measures should be taken to improve the ability of water conservation and to reduce ecological risk, for example, increasing oasis area in fringe, afforestation in the transition zone of oasis and desert and reducing planting waterintensively consuming crops.

Key words: Congjiang field carp, morphologic analysis, Qingtian field carp, genetic ana-lysis, traditional agricultural system