中国对虾对于饲料钙、磷、镁、钾、铁的营养需求量

NUTRITIONAL REQUIREMENT OF PENAEUS CHINENSIS FOR DIETARY CALCIUM,PHOSPHORUS,MAGNESIUM,POTASSIUM AND IRON

本文研究了体重8克左右的中国对虾对于饲料钙、磷、镁、钾，铁的营养需求量，为配制无机盐添加剂提供理论依据．应用正交表L18(4^5)设计饲料试验，5个因素分别为钙，磷，镁，钾、铁，试验持续48天．测定试验虾的生长、含水量、灰分及其壳重与体重之比．结果指出，饲料内含有2．2％钙、0．91％磷、0．11％镁、0．32％钾、不添加铁就能够满足试验虾的营养需求，对虾的生长最佳，含灰分量最少、壳重与体重之比最小．其次饲料内这几种元素的添加水平对于对虾的含水量没有显著性影响。本试验结果不同于李爱杰等(1984)对仔虾、幼虾试验的报导，说明中国对虾在不同生长阶段对于饲料内无机盐的需求量是不同的。

The test of nutritional requirement of Penaeus chinensis for dietarycalcium, phosphorus, magnesium, potassium and iron was designed with orthogonalmethod(L_(16)4~5). Body weight of the tested P. chinensis was about 8g. Duration of the testwas 48 days. Growth, moisture and ash of P. chinensis were determined. The ratio ofcrust to body weight was calculated. The diet with 2.2% calcium. 0.91% phosphorus, 0.11% magnesium, 0.32% potassium and without iron were optimum for the fastestgrowth, minimum ash and the lowest ratio of crust to body weight. The effect of dietarylevels of these inorganic elements on P. chinensis moisture was not significant. Compa-rison between our results and Li Ai-jie's report indicated that nutritional requirementof P. chinensis for dietary inorganic elements differ with their growth.