High grade diet should have the following requirements: (1) nutrition is abounded and balance. The animal needs what nutrient, diet has what nutrient; The animal needs the nutrient of how many quantity, diet contains the nutrient of how many quantity; The nutrition in diet deserves to compare (scale) the nutrient requirement that accords with an animal completely. (2) dainty sex is good, the animal should be fond of the diet that feeds place to make up. (3) cost as far as possible low. (4) place is applicable. The feedstuff that comprises diet is being measured when real estate more, be purchased more easily or collect; The diet that make up is easy be accepted by the user. (5) safe environmental protection. Diet feels effect to animal and even healthy to the mankind nondestructive, do not produce pollution to the environment. The author is based on afore-mentioned viewpoints, of a few nutrient in discussion diet offer an amount aptly.
1 nutrient offers quantity and its action quality The effect that diet nutrient is touching the generation inside the object for quantity and nutrient can use a figure 1 express.
Graph 1 nutrient offers quantity and effect quality Offer an amount when nutrient under the graph 1 in when C is low, the animal produces nutrition to lack disease. The nutrient in diet is not worth or lack (but through detecting diet is learned) , the animal intake inadequacy to nutrient, organization happening reduces saturated effect (but through detecting blood, organization is learned) , can bring about biochemistry injure (can pass detect distinctive thing of enzymatic work, heart, child is learned) , as a result is clinical injure and anatomize injury (can pass clinical diagnose and anatomize learn) , serious person die finally. Right now, additional nutrient is equivalent to medicine, the nutrition that can treat an animal lacks disease. Be in for the quantity when nutrient graph 1 in inside tall limits of C of C low ～ when, the action that raises minute of play is nutrition. Nutrient sort is different, afore-mentioned range breadth are discrepant. Generally speaking, the appropriate range that the vitamin offers an amount is wider, and mineral the appropriate range that offers an amount is narrower. When nutrient the prep above that offer an amount pursues 1 in when C is tall, offerred nutrient is a kind of poison, nutrient is jumped over for the quantity big, harm action is stronger, till cause an animal,die. Additional, nutrient slants for the quantity much or overmuch, still raise feed cost, waste feed resource, pollute zoology environment. Accordingly, want to advocate: (1) care animal; (2) resource conservation; (3) clean production.
Of 2 nutrient offer an amount aptly
In diet of discussion cultivate birds is being emphasized here, mineral, vitamin is mixed of amino acid offer an amount aptly (calculate for the foundation with diet) , it is with the pig exemple, put forward pig diet energy, protein to offer an amount aptly; Point out go up in actual production, supply the problem of an existence to pig energy and protein.
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