秋冬季牧场采用IGER记录器对牦牛24小时采食和反刍行为的记录研究

2005年9~10月份和11~12月份在青海省三角城种羊场秋冬牧场采用IGER记录器分别观测记录了牦牛的采食和反刍行为。秋季牧场牦牛除挤奶外24 h放牧,冬季牧场夜间栓系。结果表明牦牛在秋冬牧场的采食和反刍时间差异不显著(P>0.05)。牦牛在冬季牧场的非采食下颚活动数和每分钟采食口数显著高于秋季牧场(P<0.05)。在秋季牧场牦牛的干物质采食率和单口采食量(鲜重、干物质重、有机质)显著高于冬季牧场(P<0.05),但未知体重损失率差异不显著(P>0.05)。秋冬季牧场牦牛的采食行为主要集中在白昼,而反刍行为主要在夜间进行。

Study on Grazing and Ruminating Behaviour of Yaks over 24 Hours by Iger-recorder in Autumn and Winter Pastures

Observation and recording with IGER-recorder on grazing and ruminating behaviour of yaks that were grazed in autumn and winter pastures was conducted from September to December of 2005 in Sanjiaocheng Sheep Breeding farm.The yaks were kept in autumn pasture over 24 h except for milking.However,the yaks were kept in the pin at night in winter pasture.The results showed that no significant difference was found in grazing and ruminating time between autumn and winter pasture(P>0.05).However,the non-biting grazing jaw movement and bite rates were significantly higher in winter pasture than in autumn pasture(P<0.05).A higher significant difference was found on bite mass(fresh matter,dry matter,organic matter) in autumn pasture than in winter pasture(P<0.05),but no significant difference in insensible weight loss was detected between the 2 pastures(P>0.05).Grazing behaviour of yaks was mainly found in the daytime.However,most ruminating behaviour was processed at night.