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首页> 外文期刊>Tropical Animal Health and Production >Sheep performance under intensive continuous grazing of native grasslands of Paspalum notatum and Axonopus compressus in the subtropical region of the Highlands of Central Mexico
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Sheep performance under intensive continuous grazing of native grasslands of Paspalum notatum and Axonopus compressus in the subtropical region of the Highlands of Central Mexico

机译：在中部墨西哥高地亚热带地区的天然Paspalum notatum和Axonopus compressus草地上进行持续强放牧的绵羊表现

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摘要

Liveweight gain was evaluated in tropical Dorper X Pelibuey lambs under intensive continuous grazing of native grasslands dominated by Paspalum notatum (PN) or Axonopus compressus (AC) in the subtropics of Central Mexico. Two trials were undertaken. Trial 1 lasted 12 weeks with 10 lambs (initial weight 18 ± 2.57 kg, 3 months old) per treatment in 2002, and Trial 2 for 13 weeks with 8 lambs (initial weight 24.0 ± 2.0 kg, 4 months old) per treatment. Lambs were weighed once per week, and liveweight change was estimated by linear regression over day of the experiment, using individual regression coefficients as unbiased estimates of daily liveweight change; analysed in a random block design. Lambs on Trial 1 gained 0.061 kg/lamb/day on PN and 0.047 kg/lamb/day on AC (P > 0.05) at an overall mean stocking rate of 25 lambs/ha. In Trial 2, liveweight gain was significantly larger in PN (0.060 kg/lamb/day) than on AC (0.043 kg/lamb/day) (P < 0.05), at a mean stocking rate of 21.5 lambs/ha. It is concluded that intensive continuous grazing of native grasslands in the subtropics of the highlands of Central Mexico enables moderate liveweight gains for weaned lambs during the rainy season; with better results in grasslands dominated by Paspalum notatum.
机译：在墨西哥中部亚热带地区，以密集的西班牙牧草（Paspalum notatum）（PN）或轴心草（Axonopus compressus）（AC）为主的天然草原在密集的连续放牧下，对热带Dorper X Pelibuey羔羊的增重进行了评估。进行了两次试验。 2002年，试验1持续12周，每次治疗10只羊羔（初始体重18±2.57 kg，3个月大），试验2持续13周，每次治疗8只羔羊（初始体重24.0±2.0 kg，4个月大）。每周称重羔羊一次，并在实验的一天中通过线性回归来估计活体变化，使用个体回归系数作为每日活体变化的无偏估计。在随机块设计中进行了分析。试验1的小羊在PN上增加了0.061公斤/羔/天，在AC上增加了0.047公斤/羔/天（P> 0.05），总体平均放牧率为25羊/公顷。在试验2中，PN的活体重增加（0.060 kg /羔/天）显着大于AC（0.043 kg /羔/天）（P <0.05），平均放养率为21.5羔/公顷。结论是，在中部墨西哥高地的亚热带地区，持续不断地放牧原生草原可使断奶羔羊在雨季获得适度的增重；在以Paspalum notatum为主的草地上效果更好。

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