摘要
本试验旨在研究饲粮非纤维性碳水化合物和中性洗涤纤维比(NFC/NDF)对奶山羊甲烷(CH4)和二氧化碳(CO2)排放量的影响。选择体重、泌乳期、胎次和产奶量相近且健康无疾病的9头泌乳后期奶山羊,随机分为3组,每组3只羊,分别饲喂饲粮NFC/NDF为1.02、1.24、2.58的3种试验饲粮,采用Sable呼吸测量系统实时测定24 h内CH4和CO2排放量。结果表明:1)Sable呼吸测量系统可代替气相色谱对CH4等气体排放量进行测定,可以实时监测CH4和CO2排放量的变化,能更为准确地反映舍饲反刍动物温室气体排放的变化特征。2)CH4日排放量随奶山羊干物质采食量的增加而升高,随饲粮NFC/NDF增加而降低;CO2日排放量随饲粮NFC/NDF增加而升高。3)不同饲粮NFC/NDF条件下奶山羊在早、晚采食后3～4 h内出现排放峰值,在22:00之后,CH4排放量则保持在一个较低的浓度直至次日开始下一次采食。结果提示,饲粮NFC/NDF对奶山羊CH4和CO2排放量有显著影响。
The effects of dietary ratio of non-fiber carbohydrates to neutral detergent fiber （NFC/NDF） on methane and carbon dioxide emissions in dairy goats were studied in this trial. Nine healthy late-lactating dairy goats with similar body weight, lactation stage, parity and milk yield were randomly divided into 3 groups with 3 goats in each group, which were fed experimental diets with 1.02, 1.24 and 2.58 NFC/NDF, respectively. Methane and carbon dioxide emissions were measured using Sable respiratory measurement system. The results showed as follows： 1 ） the current gas chromatogram was substituted by Sable respiration measurement system which could be adapted to monitor concentrations of methane and carbon dioxide at real time, even show the more exactly releasing characteristic of methane and carbon dioxide about ruminant from indoor-fed livestock. 2 ） Methane daily emission was increased with the increase of dry matter intake, but was decreased with the in- crease of dietary NFC/NDF; carbon dioxide daily emission was increased with the increase of dietary NFC/ NDF. 3 ） Methane emission showed a peak after 3 to 4 hours of feeding under different NFC/NDF, after 22：00, methane emission remained a relatively low concentration until the next feeding in the next day. In conclusion, dietary NFC/NDF significantly affects the emissions of methane and carbon dioxide in dairy goats.
出处
《动物营养学报》
CAS
CSCD
北大核心
2013年第5期996-1003,共8页
CHINESE JOURNAL OF ANIMAL NUTRITION
基金
现代农业产业技术体系建设专项资金资助
内蒙古农牧业科学院青年创新基金(2012QNJJM01)
