论文部分内容阅读
小水库化肥养鱼的原理是通过向水体中投施化肥,增加水中浮游植物光合作用所需的氮、磷、钾等元素的含量,加快浮游植物的繁生,为鲢、鳙等滤食性鱼类提供更多的饵料,从而达到增产的目的。小水库化肥养鱼具有投资小、见效快、高产高效、技术易掌握等特点,很有发展前途。主要养殖对象是鲢、鳙鱼。 小水库化肥养鱼技术在河南省南阳市应用较为普遍,全市有小型水库484座,养殖水面3133公顷,有50％以上的水库使用化肥养鱼,平均每公顷增产600公斤,个别好的水库增产10倍以上,已显示出小水库化肥养鱼的显著效果和巨大潜力。小水库化肥养鱼要抓住鱼种投放和施肥两个环节。
The principle of small reservoirs and fertilizers for fish farming is to increase the contents of nitrogen, phosphorus, potassium and other elements required for the photosynthesis of phytoplankton in water to accelerate the growth of phytoplankton by feeding fertilizers into the water body and feeding the filter fish such as silver carp and bighead carp Provide more food, so as to achieve the purpose of increasing production. Small reservoir fertilizer fish with a small investment, quick, high yield and high efficiency, easy to grasp the technical characteristics, great prospects for development. The main breeding object is silver carp, bighead carp. Small reservoir fertilizer technology in Nanyang City, Henan Province is more commonly used, the city has 484 small reservoirs, aquaculture 3133 hectares, more than 50% of the reservoir using chemical fertilizers fish, an average yield of 600 kilograms per hectare, some good reservoir yield 10 times more, has shown a significant effect and great potential of small reservoir fertilizer fertilizer. Small reservoirs of chemical fertilizer to catch fish and fertilizer to seize the two links.