1.2
Add feed enzymatic preparation to be able to raise feed to change rate, reduce feed cost, reasonable the digestive utilization rate that uses enzymatic preparation to be able to raise feed, reduce feed and breed cost, raise economic benefits. Consider domestic and internationally to make clear: After feed adds enzymatic preparation, animal weightening finish raises 5%~15.2% , expect fleshy comparing drops 3%~8% , feed is changed rate raise 3.5% ~10% , laying rate raises 5%~8% , collect appetite to rise 7% . Jiang Zongyong (1995) report, young pig feed joins 0.1% excessive much more enzymatic, average day weightening finish rises 10.09% , expect fleshy comparing drops 9.3% . Willow defends a country (1998) dregs of rice in beans of egg chicken corn model add in groovy foundation ration 0.1% compound enzymatic, test group relatively contrast group laying rate raises 8.7% (P<0.05) , the egg raises 2%~3% again, expect egg comparing is reduced 9.4% (P<0.05) .
1.2.1
Add enzymatic preparation in feed directly. The simplest method is will enzymatic preparation in joining ration directly, no matter still consider from economic angle from the effect,be feasible. Pack (1996) etc reported Brazilian farm the test that to 1~45 place of day age fryer makes, dregs of rice in corn beans model the pink of ration expects and add respectively in grain enzymatic and do not add enzymatic, the result makes clear, in powdery makings and grain makings, impose enzymatic test group and contrast group of photograph comparing, day weightening finish raises 4%~5% significantly, stuff is heavy than extremely remarkable reduce.
1.2.2
Add enzymatic hind can adjust feed recipe, reduce nutrient concentration, reduce feed cost thereby. Compound enzymatic preparation applies in feed, the energy of the recipe and amino acid can be reduced appropriately and do not affect raise the effect. Result of a test grows according to fryer brood the nutrient level of fatten phase, contrast for the standard with adding enzymatic group grain, add energy of ration of enzymatic test group to reduce 2.3%~3.4% , the result does not add enzymatic normal energy group and add enzymatic low energy function does not have apparent difference between the group (P<0.05) , make clear to compound enzymatic preparation is added in ration, can reduce ration energy level and do not affect manufacturing performance of the fryer. Pack (1996) report, dregs of rice in fryer corn beans model in ration, reduce the metabolizable energy of test group ration 3% , protein and amino acerbity level are reduced 5% , early days energy and protein are mixed for 12.75MJ/kg respectively 22% , later period makings is mixed for 13.20MJ/kg 20% , affect an animal grow function, but the fryer that adds enzymatic preparation to compensation is reduced because of nutrient chroma and can be caused grows slow down, raised economic benefits.
1.2.3 replace animal sex raw material with plant sex raw material
Graham (1995) report, ablactation costly fish meal and lacteal purification are contained in young pig feed, can reduce fish meal and serum pink dosage through adding enzymatic preparation, maintain nutrient chroma changeless won't affect ablactation young pig grows. An experiment contrasts ration contains 10% serum pink and 4% fish meal, experiment ration contains 4% serum pink and 2% fish meal (reduce 6% serum pink and 2% fish meal) add a beans to dregs of rice with enzymatic preparation, adjust energy and amino acid. As a result the productivity of pig of test group young can be improved somewhat (P<0.05) , every kilogram weightening finish relatively contrast group cost is reduced 11% , economic benefits is remarkable.
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