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对一龄草鱼种培育池的水质数据采用生物统计法,以其单因子或多因子与草鱼病毒性出血病的关系进行分析比较。结果表明,出血病与某些生态因子密切相关。当水温逐渐升高时,溶氧和透明度的下降或总氮和有机氮等的升高,均易引起出血病的发生和流行。其中溶氧是诸因素中主要的发病因素,水温是发病的首要条件,其它理化因素也可成为发病因素;与水质密切相关的浮游生物量的升高或剧变对出血病有一定影响;底质含氮物高会引起水质恶化,继而导致发病。
The water quality data of the first-stage grass carp culture ponds were analyzed by biostatistics and compared with single-factor or multi-factor grass carp virus hemorrhagic disease. The results show that hemorrhagic disease and some ecological factors are closely related. When the water temperature is gradually increased, the decline in dissolved oxygen and transparency or elevated total nitrogen and organic nitrogen, are likely to cause the occurrence and epidemic of bleeding. Among them, dissolved oxygen is the main factor for the onset of disease. Water temperature is the primary condition for pathogenesis. Other physicochemical factors may also be the risk factors. Elevated or abrupt change of plankton biomass, which is closely related to water quality, Nitrogen will cause high water quality deterioration, which led to the disease.