鱼藕共生生态工程增益减耗效果研究

Benefit of Fish Lotus Symbiosis Ecological Project.

根据生态工程原理 ,应用加环措施 ,在藕田套养泥鳅和黄鳝 ,作为生产、增益、减耗复合环 ,促进鱼藕互利共生。在完全不施农药的情况下 ,有效地防治危害莲藕的食根金花虫 ,达到藕鱼增产和改善田间生态环境的效果。实验表明 ,混套养泥鳅和黄鳝的效果最为明显 ,防治率和促藕增产率分别为 83 %～99%和 12 .7% ;单独套养泥鳅或黄鳝的防治率分别为 66%～ 90 %和 5 9%～ 85 % ,促藕增产率分别为7 6%和 2 3 %

In line with the ecological engineering principle,such a link addition measure was adopted as raising loaches and paddy eels in lotus fields to form a symbiosis, which benefited both sides in increasing profit and decreasing cost of plant production.Besides the symbiosis could also effectively control lotus root eating Donacia provosti Fairmaire without the aid of pesticides, thus improving both the yields of lotus roots and fish and the eco environment of the lotus fields. Experiments demonstrated that the raising of loaches and eels in mixture yielded more significant effect with the insect control rate and yield increase rate being 83%～99% and 12.7%, respectively,than the raising of loaches or eels alone did being 66%～90% or 59%～85% and 7.6% or 2.3%, respectively.