Two alternative stocking methods (rotational and strip-grazing) were compared to continuous stocking at a stocking rate of 47 pigs ha⁻¹ in tall fescue pastures. The research was conducted during two twelve-weeks grazing periods in North Carolina (USA). In total 144 (females and castrated males, 17.5 and 29.1 kg initial body weight) crossbred Yorkshire X Berkshire, Yorkshire/Landrace X Hampshire and Yorkshire/Landrace X Duroc pigs without nose rings were used. Greater soil bulk density and soil concentrations of NO₃⁻, P, K, Mn, Zn and Cu were observed in paddocks managed continuously, while greater final ground cover (+22%) was recorded in paddocks managed with rotational and strip-grazing stocking methods. No differences were detected in botanical composition of the paddocks. Greater weight gains (+8.5%) were registered for rotationally managed pigs. Feed efficiency was better (+8%) for rotationally than for continuously stocked pigs, while strip-grazed pigs presented intermediate values. The results indicated the potential of both alternative stocking methods to be implemented in sustainable pasture-based pig production systems.

中文翻译：

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基于牧场的育肥猪生产系统放养方式的比较

在高羊茅草牧场中，将两种替代放养方法（轮牧和条带放牧）与以47头猪^-1 ha ^-1的放养率进行连续放养进行了比较。该研究在美国北卡罗来纳州的两个十二周放牧期进行。总共使用了144头（雌性和去势雄性，初始体重分别为17.5和29.1千克）杂交的约克郡X伯克郡，约克郡/兰德斯X汉普郡和约克郡/兰德斯X杜洛克的无鼻环猪。NO的更大的容重和土壤浓度₃ ^-，在连续管理的围场中观察到P，K，Mn，Zn和Cu，而在通过轮牧和条带放牧方式管理的围场中记录到更大的最终地面覆盖率（+ 22％）。在围场的植物组成上未发现差异。旋转管理猪的体重增加更大（+ 8.5％）。与连续放养的猪相比，旋转饲喂的饲料效率更高（+ 8％），而带条纹的猪呈现中等水平。结果表明，在基于牧场的可持续养猪生产系统中可以实施两种替代放养方法的潜力。