云南省是一个以山地为主的省份 ,其间分布有较多的坝塘、小水库、湖泊等水域。要提高较大水域的单产 ,应充分利用水域中饵料生物 ,合理投放鱼种 ,以混养、轮捕、轮放为基础。需要鱼种的品种要齐全 ,规格要大 ,数量要足 ,成本要低。如何满足这些条件 ,是急需解决的问题。现将解 Yunnan is a mountainous province, with more dams, reservoirs and lakes in its distribution. To improve yields of larger waters, bait organisms in the waters should be fully utilized and species should be rationally put on the basis of polyculture, round catching and rotation. Need species of fish species to be complete, specifications should be large, the number should be enough, the cost is lower. How to meet these conditions is an urgent problem to be solved. Now solution