膨化加工的草鱼饲料对混养家鱼生长影响的试验

在40条件相同、面积各为4亩的家鱼混养池塘中分别投喂3种膨化加工的和一种普通压粒的草鱼饲料，以确定膨化与非膨化加工的草鱼饲料以及不同蛋白水平的膨化草鱼饲料的生产性能。结果显示：在配方相同（蛋白含量为20阮）的条件下，与普通压粒饲料相比，膨化加L的草鱼饲料更能促进混养家鱼的生长，而且饲料系数和饲料成本都较低；对于3种膨化饲料来说，蛋白水平最高（对叽）的饲料比其它两种饲料（蛋白水平分别为18％和16％）的生产性能更好，鱼的生长更快，饲料系数和饲料成本都更低。

Three extrusion grass carp feeds with protein contents of 20％， 18％ and 16％ and one pellet （protein content 20％，same formula with extrusion feed） were fed to 4 poly-cultured fish ponds to test their productive efficiency The results were as follow：Extrusion feed was better than pellet in productive ciency， including fish growth ， feed conversion and feed cost．As for the 3 extrusion feeds，the feed with highest protein content was the best in productive efficiency．