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The purpose of this trail was to study the effect of different dietary electrolyte balance (DEB) on the production performance,nitrogen metabolism performance, blood acid-alkali and biochemical indexes, inorganic ion concentration in serum and hormone levels in serum liver of weaned～2 month and 2～3 months old rabbits.Two hundred weaned New Zealand rabbits were allocated to individual cages and randomly divided into five groups.Animals in each group were fed with a diet with the following arginine additional levels:-150,0,200,350,500 meq/kgDM. There was a 7-day adaptation period and a 23-day experimental period. The results were as follows:Experiment one: Dietary electrolyte balance levels significantly affected average daily feed intake (P<0.01) and average daily gain (P<0.05) and did not significantly affected feed/gain ratio (P>0.05). The DEB levels did significantly affected RN and did not significantly affected IN, FN, UN, DN, DN/IN ratio, RN/IN ratio and RN/DN ratio (P>0.05). The DEB levels did not significantly affected blood pH value, HCO3- concentration, PCO2, PO2 and TCO2 concentration (P>0.05). The DEB levels had significant effect on blood BE (P<0.01) and AG (P<0.05). The concentrations of K, Na, Cl, Ca, P, TP, CREA, CPK and GPT in the serum weren’t significantly affected by the DEB (P>0.05). The concentrations of GLU, BUN, TG, AKP and TCHO in the serum were significantly affected by the DEB (P<0.05). The DEB levels did not significantly affected PTH and h-CT(P>0.05), and had significant effect on blood OG (P<0.01). The serum methionine content of 350 meq/kg mmol/kg DEB was higher than those of the other groups (P<0.05), the content of lysine, arginine and total free amino acids in the serum had no significant different among different treatments (P>0.05). In conclusion, in this experiment condition, the appropriate DEB of weaner to 2-month-old growing meat rabbit was 200~300meq/ kg.Experiment two: Dietary electrolyte balance levels significantly affected average daily feed intake (P<0.01) and average daily gain (P<0.05) and did not significantly affected feed/gain ratio (P>0.05). The DEB levels did significantly affected RN and did not significantly affected IN, FN, UN, DN, DN/IN ratio, RN/IN ratio and RN/DN ratio (P>0.05). The DEB levels did not significantly affected blood pH value, HCO3- concentration, PCO2, PO2 and TCO2 concentration (P>0.05). The DEB levels had significant effect on blood BE (P<0.01) and AG (P<0.05). The concentrations of K, Na, Cl, Ca, P, TP, CREA, CPK ,AKP and GPT in the serum weren’t significantly affected by the DEB (P>0.05). The concentrations of GLU, BUN, TG and TCHO in the serum were significantly affected by the DEB (P<0.05). The DEB levels did not significantly affected PTH, OG and h-CT(P>0.05). The serum methionine in the serum was significantly affected by the DEB (P<0.05), and 200 meq kg DEB was higher than those of the other groups. the content of lysine, arginine and total free amino acids in the serum had no significant different among different treatments (P>0.05). In conclusion, in this experiment condition, the appropriate DEB of 2 to 3-month-old growing meat rabbit was 200~350meq/ kg.
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