摘要
The grazing behaviour of cows from two mixed herds grazing semi-natural mountain grasslands was studied for two weeks each summer during three years. The two breeds included in the study were the high yielding, modern dairy cattle breed Norwegian Red (NR) and the moderate yielding, old dairy cattle breed Blacksided Tr⊘nder and Nordland Cattle (STN). Grazing behaviour included general activities such as walking, standing, lying and playing, and grazing activities such as grazing, drinking and ruminating. During the daily grazing period the cows’ grazing behaviour were recorded at fixed intervals of 10 or 15 min. Breed differences were found in three of the recorded traits. The NR cows showed a higher frequency of ‘standing’ than the STN cows (p<0.01), and the STN cows showed higher frequencies of ‘walking’ (p<0.05) and ‘playing’ (p<0.01) than the NR cows. The time spent on grazing showed no difference between the breeds. The number of observations in the present study was somewhat limited as these types of studies are very resource demanding. Longer recording periods, more animals and farms would have been preferable. However, the breed differences expressed are in line with the expectations with regard to playing, standing and walking, while grazing activity did not follow the hypothesis made.
摘要译文
在三年奶牛两个混合畜群放牧半天然草原的山放牧行为进行了研究两周每个夏天。包括在研究这两个品种是高产，现代化奶牛养殖挪威红（NR）和中等收益，老奶牛养殖Blacksided Tr的与升气管牛诺德兰（STN）。放牧行为包括一般的活动，如行走，站立，卧，玩，和放牧活动，如放牧，饮水和反刍。在日常的放牧期奶牛放牧行为被记录在10或15分钟固定的时间间隔。品种差异，在三个记录特质。该NR奶牛显示''''站立''''比STN奶牛频率较高（P花费在放牧的时候表现出品种之间没有区别。在本研究中观察的数目是一定的限制，因为这些类型的研究是苛刻非常资源。更长的录制时间，更多的动物和农场会是可取的。然而，表达的品种差异与有关的演奏，站立和行走的预期，而放牧活动没有按照提出的假说。
Nina H. Sæther[a][*]; Knut E. B⊘e[a] ; Odd Vangen[a]. Differences in grazing behaviour between a high and a moderate yielding Norwegian dairy cattle breed grazing semi-natural mountain grasslands[J]. Acta Agriculturae Scandinavica, Section A - Animal Science, 2006,56(2): 91-98