Comparisonof BM1259 andyuccaextract on ammonia nitrogen emission of manureduring storage periodin laying hens

Zhang Weili;Yu Lihuai;Xiao Tianrong;Liu Zhengxu;Xu Denghui;Li Zhibing;Zhang Yanyun;

yucca extract;;BM1259;;nitrogen compound

The study was conducted to compare the difference of BM1259 and yucca extract on nitro-gen compounds concentration and enzyme activities during manure storage period in laying hens. Twohouses of 320-day-old Jinghong No. 1 laying hens with similar rearing environment, farming scale andbreeding density were selected, and 150 g/t yucca extract and 200 g/t BM1259 were added to the lay-ing hen diet of each house randomly. On day 27, manure samples within 30 min after excreting werecollected from 4 repetitions(9 hens each) in each house, pretreated and then storage at 30 ℃. Thechanges of ammonia-nitrogen, urea-nitrogen and uric acid concentration, uricase activity and pH at 0,6, 12, 24, 48, 72, 168 h after storage were measured. The results showed that: 1 BM 1259 group hadsignificant lower uric acid concentration at 72 h, and dramatical higher uricase activity at 168 h(P<0.01) comparing with that of yucca extract(P<0.05); besides, there was no significant difference betweentwo groups in other parameters during laying hens manure storage period; 2The dynamic tendencywere similar in the proportion of ammonia-nitro-gen, urea- nitrogen, uric acid, uricase activityand pH during 0 to 168 h. The result indicatedthat the function of adding BM1259 on ammonia-nitrogen emission was similar to yucca extract addition.