作 者：
朱丽媛;卢庆萍;庞敏;孟丽辉;张宏福;马金霞
单 位：
内蒙古自治区农业广播电视学校;中国农业科学院北京畜牧兽医研究所/动物营养学国家重点实验室
摘 要：
试验旨在研究麦麸、燕麦麸对生长猪氮排放的影响。试验采用单因子完全随机设计,选取15头健康、日龄、体重接近(IBW,46.45±3.20kg)的长×大阉公猪,随机分为3组,分别饲喂基础饲粮、麦麸饲粮和燕麦麸饲粮(分别以20%的麦麸和燕麦麸替代基础饲粮)。试验第27d和28d采集粪便与尿液样品,测定新鲜粪便与尿液的总氮和氨氮含量,以及粪便与尿液贮存0h、9h、24h、48h、72h和7d后的氨氮含量。(结果)结果表明,燕麦麸组粪便pH显著低于基础组和麦麸组(P<0.05);麦麸组尿液pH显著低于基础组(P<0.05)。各处理组新鲜粪便与尿液的氨氮含量差异不显著(P>0.05)。麦麸组和燕麦麸组尿液总氮含量分别比基础组低20%和52%(P<0.05);燕麦麸组粪便总氮含量显著高于基础组和麦麸组(P<0.05)。各处理组粪便与尿液的氨氮含量均随贮存时间的增加而增加。麦麸组粪便在贮存各时间点(0h除外)的氨氮含量显著低于基础组和燕麦麸组(P<0.05);燕麦麸组尿液贮存48h、72h后的氨氮含量显著低于基础组和麦麸组(P<0.05),麦麸组又显著低于基础组(P<0.05);燕麦麸组和麦麸组尿液在贮存各时间点(0h和24h除外)的氨氮含量都低于基础组,且降低幅度分别为13~28%和5~16%。(结论)综合以上结果,饲粮中添加20%麦麸可降低生长猪尿液总氮含量、尿液与粪便贮存后的氨氮含量;而添加20%燕麦麸可降低生长猪尿液总氮含量、尿液贮存后的氨氮含量。燕麦麸降低尿氮含量及尿液贮存后氨氮含量的效果优于麦麸,这可能与其可溶性日粮纤维含量(Soluble dietary fiber,SDF)较高有关。
译 名：
Effects of Wheat Bran and Oat Bran on Nitrogen Excretion in Growing Pigs
作 者：
ZHU Li-yuan;LU Qing-ping;PANG Min;MENG Li-hui;ZHANG Hong-fu;MA Jin-xia;Institute of Animal Science,Chinese Academy of Agricultural Sciences,State Key Laboratory of Animal Nutrition;The Inner Mongolia Agricultural Broadcasting and Television School;
关键词：
wheat bran;;oat bran;;growing pig;;feces;;urine;;nitrogen
摘 要：
The present study was conducted to investigate the effects of wheat bran and oat bran on nitrogen excretion in growing pigs.The experiment adopted a one-factor completely random design.Fifteen Landrace× Yorkshire barrows,which were in good health and had similar weight(initial body weight 46.45±3.20kg),were randomly allocated into three treatments.The 3experimental diets consisted of a basal diet,a wheat bran diet and an oat bran diet(adding 20% wheat bran and oat bran to replace the basal diet,respectively).On day 27 and 28,feces and urine samples were collected to determine total nitrogen and ammonia nitrogen content of fresh feces and urine,as well as ammonia nitrogen content of feces and urine stored for 0h,9h,24 h,48h,72 hand 7d.The results showed that the pH-value in feces of pigs fed the oat bran diet were significantly lower than other groups(P<0.05).The pH-value in urine of pigs fed the wheat bran diet were significantly lower than the basal group(P<0.05).The difference of fresh feces and urine'ammonia nitrogen content of each treatment group were not significant(P>0.05).Compared with the basal group,urinary nitrogen content of the wheat bran and oat bran group decreased by 20%and 52%(P<0.05),respectively.Fecal nitrogen content of pigs fed the oat bran diet were significantly higher than other groups(P<0.05).Ammonia nitrogen content of stored feces and urine of each treatment group went up with the increase of storage time.Ammonia nitrogen content of stored feces(except 0h)of the wheat bran group was lower than other groups(P<0.05).Ammonia nitrogen content of urine stored for48 hand 72hof pigs fed the oat bran diet was significantly lower than other groups(P<0.05),and that of the wheat bran group was significantly lower than the basal group(P<0.05).Ammonia nitrogen content of stored urine(except 0hand 24h)of pigs fed the oat bran diet and the wheat bran diet were lower than the basal group,and the reduction reached 13~28% and 5~16%,respectively.In conclusion,supplementation of 20% wheat bran in diets for growing pigs can reduce urinary nitrogen content and ammonia nitrogen content of stored feces and urine.Moreover,inclusion of 20% oat bran in diets can reduce urinary nitrogen content and ammonia nitrogen content of stored urine.The oat bran diet has a better effect on reducing urinary nitrogen content and ammonia nitrogen content of stored urine than the wheat bran diet,which may be associated with its high soluble dietary fiber(SDF)content.
