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１材料与方法１．１试验于１９９８年７月至８月，在青岛市红岛育苗场进行，每个试验水池有效水体０．３５m３，饲养时间３０d。１．２试验用维生素C选用L－抗坏血酸多聚磷酸酯（LAPP），VC含量为１５％。试验分１０个处理，每个处理中LAPP含量分别为（mg／kg）：１００、２０?
1 Materials and Methods 1.1 The experiment was conducted in July and August 1998 at Hongdao Nursery in Qingdao. The effective water volume of each test basin was 0.35m3 and the feeding time was 30 days. 1.2 Experimental use of vitamin C L-ascorbic acid polyphosphate (LAPP), VC content of 15%. The experiment was divided into 10 treatments, the content of LAPP in each treatment was (mg / kg): 100,20?