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池塘施肥是为了补充水中的营养盐类及有机物质,以繁殖大量的浮游生物和底栖动物等,供鱼类摄食,有机肥料中的有机碎屑及附着微生物也是一些鱼类的饵料。 在白鲢的食物中,浮游植物占大部分,而浮游植物含叶绿素,能利用太阳光进行光合作用,所以它们也就像庄稼一样需要氮、磷等营养盐类。在水中这些营养盐类就依靠施肥的途径来满足。浮游植物除直接供给一些鱼类摄食外,它们还是鱼类的间接饵料,即浮游植物被浮游动物或底栖动物等吞食掉,然后鱼类再吞食浮游动物或底栖动物,这样更需要有大量营养盐类的补充,以不断满足鱼类生长的需要,特别是我国养殖鱼类中,植物食性者较多,因而施肥就显得格外重要,效果也更加显著。
Pond fertilization is to supplement the nutrients and organic matter in the water, in order to breed a large number of plankton and zoobenthos for fish food, organic fertilizer organic debris and attached microorganisms are also some fish bait. Among the silver carp, phytoplankton account for most of the phytoplankton, while phytoplankton contain chlorophyll and can use sunlight for photosynthesis, so they also need nitrogen and phosphorus nutrients like crops. In the water, these nutrients rely on fertilizing ways to meet. In addition to direct feeding of some species of phytoplankton, they are also indirect bait for fish, that is, phytoplankton are swallowed up by zooplankton or zoobenthos and then swallowed by zooplankton or zoobenthos, which in turn requires a large amount of phytoplankton Nutritional supplements, in order to continuously meet the needs of fish growth, especially in China’s breeding fish, plant dietetic more, and thus fertilization is particularly important, the effect is more significant.