The effect of organic acids (OA) and dicalcium phosphate (P_i) supplementation in the feed of Labeo rohita fingerlings was studied by formulating seven practical diets, designed as D1 with no feed additives {dicalcium phosphorus (P_i) and organic acid (OA) blend} while, D2, D3, D4 and D5 were supplemented with P_i at the graded levels of 5, 10, 15 and 20 g/kg, respectively, whereas D6 and D7 contained blend of OA at 15 and 30 g/kg, respectively. The diet supplemented with OA blend exhibited increase (p < .05) in growth of L. rohita fingerlings compared with the diet supplemented with P_i. The OA supplementation at both levels showed significant improvement in nutrients digestibility and minerals absorption in fingerlings. Moreover, in case of muscle proximate composition, crude fat (CF) and crude protein (CP) were increased (p < .05) with the inclusion of OA blend in the diet while crude ash (CA) was improved by P_i supplementation. Additionally, digestive enzyme activities were not affected (p Ëƒ .05) by OA blend supplementation while increased activities were observed in the fingerlings fed with P_i diet. Consequently, supplementation of OA blend in the diet improved the growth performance and nutrient status while P_i enhanced digestive enzyme activities of L. rohita fingerlings.

中文翻译：

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有机酸和磷酸氢钙的补充对Labeo rohita鱼种磷生物利用度，生长性能和消化酶活性影响的比较

通过配制七种不添加饲料添加剂{二钙磷（P _i）和有机酸（OA _）的D1的实用日粮，研究了补充有机酸（OA）和磷酸二钙（P _i）在Labeo rohita鱼种饲料中的作用。 }混合}，而D2，D3，D4和D5分别以5、10、15和20 g / kg的分级添加P _i，而D6和D7包含15和30 g / kg的OA混合。 ， 分别。补充有OA共混物表现出增加（饮食p 在生长<0.05）L.鲮鱼种用补充有P上的饮食相比_我。两种水平的OA补充剂均显示了鱼种营养物质消化率和矿物质吸收的显着改善。此外，在肌肉最接近的情况下， 在饮食中加入OA混合物可增加粗脂肪（CF）和粗蛋白（CP）（p <.05），而通过补充P _i可改善粗灰分（CA）。此外，补充OA混合物不会影响消化酶的活性（p  0.05），而在喂食P _i的鱼种中观察到酶的活性增加。因此，在日粮中添加OA混合物可改善生长性能和营养状况，而P _i则可增强罗氏乳杆菌的消化酶活性。 鱼种。