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首页> 外文期刊>The Progressive Fish-Culturist >GROWTH AND SURVIVAL OF WALLEYES REARED IN PONDS FERTILIZED WITH ORGANIC OR INORGANIC MATERIALS
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GROWTH AND SURVIVAL OF WALLEYES REARED IN PONDS FERTILIZED WITH ORGANIC OR INORGANIC MATERIALS

机译：用有机或无机材料施肥的池塘中长城鹅的生长和存活

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Fry of walleye Stizostedion vitreum were reared for 40 d at a density of 16 fish/m(3) in ponds fertilized with organic or inorganic matter and at 50 fish/m(3) with inorganic fertilization. At the lower density, inorganic fertilization was more economical than organic fertilization, and fish survival was unaffected by fertilizer treatment. Although fish lengths were similar in both treatments, fish in the inorganically fertilized ponds gained less weight than those in the organically fertilized treatment. At the higher density, fish survival was unaffected, but growth was reduced so that the fish were unacceptably small for stocking. Fish production did not vary significantly among the treatments, but was lower at the higher density than reported in similar studies. Production may have been limited by low alkalinities in the ponds. Ponds receiving inorganic fertilizers had higher dissolved-oxygen levels than those fertilized with organic matter.
机译：在用有机或无机物质施肥的池塘中，以16条鱼/ m（3）的密度饲养角膜白斑玻璃体的鱼苗40 d，用无机肥施以50条鱼/ m（3）的密度。在较低的密度下，无机施肥比有机施肥更经济，并且鱼类的存活不受肥料处理的影响。尽管两种处理的鱼长相似，但无机施肥池中鱼的重量要小于有机施肥池中鱼的重量。在较高的密度下，鱼类的存活率不会受到影响，但会减少其生长，因此，它们的体积很小，无法放养。在不同的处理方法中，鱼的产量没有显着差异，但密度较高时，产量却低于类似研究中的报告。池塘的碱度低可能限制了产量。与使用有机物施肥的池塘相比，使用无机肥料的池塘具有更高的溶解氧水平。

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