Studies On Metabolizable Energy, Crude Protein, Calcium And Non-phytic Acid Phosphor Requirments Of Hybrid Geese From 0 To 4 Week Of Age

The experiment were adopted L₉(3⁴) orthogonal design to evaluate effects of dietary feasible levels of metabolizable energy(ME),crude protein(CP),calcium(Ca) and non-phytic acid phosphor(NPP) on growth performance,apparent digestibility,slaughter performance indicators, tibia characteristics indicators,and serum biochemical indicators of hybrid geese from 0 to 4 week of age(Rhin geese♂×Shuangcheng geese♀).The purpose of experiments was to determinate ME, CP,Ca and NPP requirements of hybrid geese from 0 to 4 week of age.These geese(n=216) were randomly assigned to 9 dietary treatments,each dietary treatment was replicated 4 times,and each replicated time was assigned to 6 geese.ME levels were 10.9MJ/kg,11.7 MJ/kg,12.5 MJ/kg;CP levels were 16%,18%20%;Ca levels were 0.8%,1.0%,1.2%;NPP levels were 0.3%,0.5%,0.7%.The results of the experiment showed:(1)average final weight(AFW) and average daily gain(ADG) increased extremely significantly(P＜0.01),average daily feed intake(ADFI) and feed gain ratio(F/G) decreased extremely significantly(P＜0.01),with the increasing dietary ME level; the highest ADG and the lowest F/G was in dietary ME 12.5MJ/kg treatment.Dietary ME affected F/G significantly(P＜0.05),there was no significant difference between dietary CP 18%and 20% treatments,but there was significant difference between dietary CP18%,20%treatments and dietary CP16%treatment(P＜0.05).Dietary Ca affected ADG significantly(P＜0.05),the highest ADG was in dietary Ca1.0%treatment.There was significant difference between dietary Ca 1.0%and Ca1.2%treatment(P＜0.05),and no significant difference between dietary Ca 1.0%and 0.8% treatment(P＞0.05).(2) Dietary ME did not significantly affect energy apparent digestibility (P＞0.05),but energy apparent digestibility increased with the increasing dietary ME level.Dietary CP affected CP apparent digestibility extremely significantly(P＜0.01),and the highest CP apparent digestibility was in dietary CP 16%treatment.Dietary Ca did not significantly affect Ca apparent digestibility(P＞0.05),but energy apparent digestibility decreased with the increasment of dietary Ca level.Dietary Ca and NPP affected phosphor apparent digestibility extremely significantly (P＜0.01).(3) Dietary ME affected abdominal fat ratio extremely significantly(P＜0.01),and the highest intestinal ratio was in Dietary ME 12.5 MJ/kg treatment;dietary ME and CP affected intestinal ratio significantly(P＜0.05),the highest intestinal ratio was in dietary ME 10.9 MJ/kg and CP16%treatment.(4) Dietary CP affected tibia P significantly(P＜0.05).Dietary NPP affected ash of tibia extremely significantly(P＜0.01),and tibia Ca and tibia P significantly(P＜0.05).(5) Dietary ME affected the concentriation of HDL,LDL,CHO,GH,IGF-1 in serum significantly (P＜0.05),and UA extremely significantly(P＜0.01),the highest concentriation of HDL,LDL,CHO, GH,IGF-1 and UA in serum was in Dietary ME 12.5 MJ/kg treatment.Dietary CP affected P in serum extremely significantly(P＜0.01),dietary CP affected the concentriation of TG,UA and the activity of AKP in serum significantly(P＜0.05),dietary Ca and NPP affected the activity of AKP in serum significantly(P＜0.05).In conclusion,the suitable ME,CP,Ca and NPP requirements for hybrid geese from 0 to 4 week of age were ME 12.5MJ/kg,CP18.0%,Ca0.8%and NPP 0.5%.