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Predicting cattle grazing behavior on rangeland using accelerometers
Rangeland Ecology & Management ( IF 2.4 ) Pub Date : 2020-11-05 , DOI: 10.1016/j.rama.2020.10.001
James E. Sprinkle , Joseph K. Sagers , John B. Hall , Melinda J. Ellison , Joel V. Yelich , Jameson R. Brennan , J. Bret Taylor , James B. Lamb

The objective was to determine if 3-axis accelerometers could be used to predict daily activity for cattle grazing rangeland. There were 48 Hereford × Angus 2-yr-old low- or high-residual feed intake (LRFI or HRFI) cows used in this 2-yr trial. Cattle grazed in 4 pasture treatments consisting of continuously grazed, control (CCON); continuously grazed, supplemented (CTRT); rotationally grazed, control (RCON); and rotationally grazed, supplemented pastures (RTRT). Three LRFI- and 3 HRFI-collared cows in each treatment had accelerometers mounted for 29 d in 2016 and 45 d in 2017, beginning mid-October. Grazing time (GT), resting time (RT), and walking time (WLK) were obtained for each cow by direct observation over 3 d each year and compared with accelerometer predicted behavior. In 2016, 1.6% of the days were rejected for halter-mounted accelerometers and 3.6% were rejected in 2017 for collar-mounted accelerometers. The GT and RT were more accurately predicted than was WLK with the percentage error of predicted against observed data being 11.94% for RT, 13.51% for GT, and 30.13% for WLK in 2017. Less observation data were available in 2016, but when considering other sampling periods for the same cows and halters, the error rate was 15.1% for RT, 19.3% for GT, and 52.6% for WLK. The accelerometers successfully identified patterns of grazing behavior and differentiated among climatic, grazing system, supplementation status, and residual feed intake classification influences on GT, RT, and WLK. In a more moderate climate year, HRFI cattle appeared to rest less (P < 0.08) and walk more (P < 0.07) than LRFI cattle. Similar patterns were observed for cattle in the CCON versus CTRT treatments, with supplemented cattle resting more (P < 0.05) and walking less (P < 0.05). Accelerometers appear to be effective in determining mechanistic adaptations in grazing behavior by beef cattle on range.



中文翻译:

使用加速度计预测牧场上的牛放牧行为

目的是确定是否可以使用3轴加速度计来预测牲畜放牧牧场的日常活动。在此2年试验中,使用了48头Hereford×Angus 2岁低或高残留饲料摄入量(LRFI或HRFI)母牛。牛在4种牧场处理中放牧,包括连续放牧,对照(CCON);连续放牧,补充(CTRT);旋转放牧控制(RCON); 和旋转放牧的补充牧场(RTRT)。从10月中旬开始,每种处理中的3头LRFI奶牛和3头HRFI奶牛的加速度计在2016年安装了29天,2017年安装了45天。通过每年3天的直接观察获得每头母牛的放牧时间(GT),休息时间(RT)和步行时间(WLK),并与加速计的预测行为进行比较。在2016年,1。2017年,有6%的日子被挂在背上的加速度计被拒绝,在3.6%的日子里被颈环安装的加速度计被拒绝。与WLK相比,GT和RT的预测更准确,2017年RT的预测数据相对于RT的预测误差为11.94%,GT的预测为13.51%,WLK的预测误差为30.13%。2016年可用的观测数据较少,但考虑到在相同奶牛和笼头的其他采样期间,RT的错误率是15.1%,GT的错误率是19.3%,WLK的错误率是52.6%。加速度计成功地确定了放牧行为的模式,并区分了气候,放牧系统,补给状态以及残余饲料摄入分类对GT,RT和WLK的影响。在气候较为温和的一年,HRFI牛的休息时间似乎减少了(与WLK相比,GT和RT的预测更准确,2017年RT的预测数据相对于RT的预测误差为11.94%,GT的预测为13.51%,WLK的预测误差为30.13%。2016年可用的观测数据较少,但考虑到在相同奶牛和笼头的其他采样期间,RT的错误率是15.1%,GT的错误率是19.3%,WLK的错误率是52.6%。加速度计成功地确定了放牧行为的模式,并区分了气候,放牧系统,补给状态以及残余饲料摄入分类对GT,RT和WLK的影响。在气候较为温和的一年,HRFI牛的休息时间似乎减少了(与WLK相比,GT和RT的预测更准确,2017年RT的预测数据相对于RT的预测误差为11.94%,GT的预测为13.51%,WLK的预测误差为30.13%。2016年可用的观测数据较少,但考虑到在相同奶牛和笼头的其他采样期间,RT的错误率是15.1%,GT的错误率是19.3%,WLK的错误率是52.6%。加速度计成功地确定了放牧行为的模式,并区分了气候,放牧系统,补给状态以及残余饲料摄入分类对GT,RT和WLK的影响。在气候较为温和的一年,HRFI牛的休息时间似乎减少了(2016年可获得的观测数据较少,但考虑相同奶牛和笼头的其他采样期时,RT的错误率是15.1%,GT的错误率是19.3%,WLK的错误率是52.6%。加速度计成功地确定了放牧行为的模式,并区分了气候,放牧系统,补给状态以及残余饲料摄入分类对GT,RT和WLK的影响。在气候较为温和的一年,HRFI牛的休息时间似乎减少了(2016年可获得的观测数据较少,但考虑相同奶牛和笼头的其他采样期时,RT的错误率是15.1%,GT的错误率是19.3%,WLK的错误率是52.6%。加速度计成功地确定了放牧行为的模式,并区分了气候,放牧系统,补给状态以及残余饲料摄入分类对GT,RT和WLK的影响。在气候较为温和的一年,HRFI牛的休息时间似乎减少了(P <0.08)和比LRFI牛走路更多(P <0.07)。在CCON和CTRT处理中,观察到牛的模式相似,补充的牛休息更多(P <0.05),步行更少(P <0.05)。加速度计似乎可以有效地确定远距离肉牛放牧行为的机械适应性。

更新日期:2020-11-06
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