摘要
本试验利用150只星布罗肉用仔鸡,研究了32℃高温时在饮水中添加不同水平的氯化铵(NH_4Cl)对肉用仔鸡的生产性能、生理反应及血液指标的影响。试验表明:添加氯化铵可显著提高肉用仔鸡的日增重(P<0.05),在饮水中添加0.16%和0.24%的 NH_4Cl 分别提高日增重17%和18%。热应激时添加 NH_4Cl 可显著降低仔鸡的饲料转化比(P<0.05),但对采食量无显著影响.高温时添加氯化铵,使肉用仔鸡的呼吸数和喘气率显著下降(P<0.05),但对体温不产生显著影响.添加 NH_4Cl 时,血液的 pH 值有下降的趋势,但未达到显著水平,饮水中添加 NH_4Cl 可显著降低血糖水平(P<0.05).
A total of 150 broilers were divided into five groups to study the effect of supple-mental ammonium chloricle (NH_4Cl) on the performance of chicks during heat stress. Bird's physiological responses and blood parameters were also examined.The resultsshowed:①Compared with group 1,group 3 and 4 not only significantly increasecl bodyweight gains by 17% and 18%,but also improved feed conversion.But adding NH_4Clhad no significant effent on feed intake.②No significant differences were found inblood pH,PCO_2,PO_2 [HCO_3^-].and plasma osmotic pressure among all groups.butNH_4Cl significantly decreaseased the plasma glucose level of broilers during heat stress.③Broilers during heat stress had higher body temperatures(BT),respiratory rates (RR)and panting rates (PR),adding NH_4Cl decreased RR and PR.
出处
《饲料博览》
1989年第4期1-3,40,共4页
Feed Review
