饲喂复合益生菌对奶牛粪便中氨气产生及微生物含量的影响

Effect of Complex Probiotics on Ammonia Production and Microorganisms in Cattle Manure

试验旨在研究饲喂复合益生菌对奶牛粪便中氨气产生及微生物含量的影响。试验选用18头胎次、体重、泌乳阶段及产奶量相近的澳洲荷斯坦奶牛,采用完全随机分组试验设计,分为对照组、低剂量益生菌组和高剂量益生菌组。对照组不饲喂益生菌,2个益生菌处理组分别饲喂50和100mL/d的益生菌液。试验期为60d,分为试验前期和试验后期,各30d。结果表明,在整个试验期,益生菌处理组显著降低了牛粪中氨气产量(P<0.05)。此外,30d时,低剂量组和高剂量组乳酸菌含量均极显著高于对照组(P<0.01);60d时,低剂量组乳酸菌含量显著高于对照组(P<0.05)。试验结果提示,饲喂复合益生菌能调节奶牛肠道微生态环境,降低牛粪中氨气的产生,改善环境空气质量。

To research the impact of complex probiotics feeding on ammonia production and microor- ganisms in cattle manure,18 Holstein cows with similar parity, weight, stage of lactation and milk yield were chosen for a 60d matched-paris design and divided into the control group, groups with low daily dose of 50 mL probiotics and higher daily dose of 100 mL probiotics. The results showed that probiotics treat- ment groups significantly reduced the ammonia production in the manure during the whole experiment peri- od （P〈0.05）. In addition, lactobacillus content in low dose group and higher dose group were higher than the control group on day 30 （P〈0.01）, and lactobacillus content in low dose group was significantly high- er than the control group when experiment ended （P〈0.05）. The results suggested that complex probiot- ics can adjust the intestinal micro ecologic environment of cows, and reduce the ammonia production in cow manure and improve the air quality.