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在选择鱼类颗粒饲料配方时,首先要考虑到养殖鱼类的食性和对主要营养元素的需求。其次,要了解各种饲料原料营养成分及其相互平衡和这些营养成分的可消化性。还要了解饲料原料的来源。若配制的饲料营养成分不全或不符合鱼类营养的需要,鱼类生长就会受到影响。如果生产的饲料营养成分过多或难以消化,就会造成饲料浪费,增大饲料成本,影响到鱼类的正常生长发育。因此,在选配鱼类颗粒饲料时,应当注意以下几个问题。1多种饲料原料的配合 各种饲料原料都有其特性,营养价值也不相同。就蛋白质含量而言,动物性饲料原料较植物性饲料原料为高。在植物性饲料原料中,饼粕类比糠麸类蛋白质含量高。每一种原料从营养学的角度来看,都不可能满足鱼类对营养的需求,而只是某一种或某一部分营养可以满足鱼
When choosing a fish pellet formulation, consider first the feeding habits of farmed fish and the need for key nutrients. Second, to understand the nutritional ingredients of various feed ingredients and their balance and the digestibility of these nutrients. Also understand the source of feed ingredients. If the formulated feed is not nutritious or does not meet the needs of fish nutrition, fish growth will be affected. If the nutrients produced in the feed are too much or difficult to digest, it will result in waste of feed, increase feed costs and affect the normal growth and development of fish. Therefore, in the selection of fish pellets, should pay attention to the following questions. A variety of feed ingredients with a variety of feed ingredients have their own characteristics, nutritional value is not the same. In terms of protein content, animal feed ingredients are higher than plant feed ingredients. In plant feedstuffs, the cake is higher in protein than bran and bran. From the nutritional point of view, each raw material can not satisfy the demand of fish for nutrition, but only one or some of the nutrients can satisfy the demand of fish