Scholarlink

<p>Silvopastoral systems (SPS) can significantly influence microclimatic conditions, forage characteristics, and animal welfare and performance, effects that are probably related to tree age and density. To study the impact of tree density (<i>Eucalyptus grandis</i>) on these variables during the summer, 29 cow-calf pairs (Brangus and their crossbreeds with British breeds) were randomly assigned to 3 treatments: (1) Full sun (0 trees/ha), (2) Low density (160 trees/ha), (3) High density (240 trees/ha), replicated in 3 blocks (9 plots). The experiment was carried out in Cerro Largo, Uruguay. Animals grazed native grasslands dominated by warm-season grasses. Grazing intensity was managed through sward height at 7–10&#xa0;cm in all treatments. The Black Globe Temperature Humidity Index was lower under the trees in both SPS (86 ± 0.4) compared to the alley (88 ± 0.4) and full sun (88 ± 0.4), but lowest in the alley of high (75 ± 1.4) than low (84 ± 1.4) tree density SPS at 10:00 (<i>P</i> &lt; 0.05). Photosynthetically active radiation (PAR) transmission was lower under the trees (86%) than in the alley of the high tree density (96%) and full sun (100%; <i>P</i> &lt; 0.05). However, forage allowance (4–5 kgDM/kg live weight), its chemical composition (crude protein: 7–8%; neutral detergent fibre: 65–66%; acid detergent fibre: 34–35%) and calves’ weaning weights (171–178&#xa0;kg) were similar between treatments (<i>P</i> &gt; 0.05). In conclusion, the incorporation of trees to native grasslands in SPS of 160 and 240 trees/ha, promoted mild changes in thermal comfort and PAR transmission two years after planting, without affecting forage quality and cow-calf performance.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Early-stage Eucalyptus-based silvopastures improve thermal comfort conditions for cattle grazing native grasslands during summer

  • 期刊论文

  • 发表日期：

    2025年10月10日

查看全文
  • P. N. Llanos,
  • C. M. Gonzalez,
  • J. K. Fedrigo,
  • V. Benitez,
  • C. Viñoles

摘要

Silvopastoral systems (SPS) can significantly influence microclimatic conditions, forage characteristics, and animal welfare and performance, effects that are probably related to tree age and density. To study the impact of tree density (Eucalyptus grandis) on these variables during the summer, 29 cow-calf pairs (Brangus and their crossbreeds with British breeds) were randomly assigned to 3 treatments: (1) Full sun (0 trees/ha), (2) Low density (160 trees/ha), (3) High density (240 trees/ha), replicated in 3 blocks (9 plots). The experiment was carried out in Cerro Largo, Uruguay. Animals grazed native grasslands dominated by warm-season grasses. Grazing intensity was managed through sward height at 7–10 cm in all treatments. The Black Globe Temperature Humidity Index was lower under the trees in both SPS (86 ± 0.4) compared to the alley (88 ± 0.4) and full sun (88 ± 0.4), but lowest in the alley of high (75 ± 1.4) than low (84 ± 1.4) tree density SPS at 10:00 (P < 0.05). Photosynthetically active radiation (PAR) transmission was lower under the trees (86%) than in the alley of the high tree density (96%) and full sun (100%; P < 0.05). However, forage allowance (4–5 kgDM/kg live weight), its chemical composition (crude protein: 7–8%; neutral detergent fibre: 65–66%; acid detergent fibre: 34–35%) and calves’ weaning weights (171–178 kg) were similar between treatments (P > 0.05). In conclusion, the incorporation of trees to native grasslands in SPS of 160 and 240 trees/ha, promoted mild changes in thermal comfort and PAR transmission two years after planting, without affecting forage quality and cow-calf performance.