ENADE Medicina Veterinária Practice Questions - ENADE Medicina Veterinária - Exame Nacional De Desempenho Dos Estudantes Exam

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Integrated Crop-Livestock-Forestry Systems (ILPF / iLPF) have gained national prominence in Brazilian sustainable agriculture. From the perspectives of veterinary bioclimatology, animal welfare, and greenhouse gas mitigation, what is the primary physiological benefit of tree shade integration for grazing beef cattle?

The microclimate reduces radiant heat load and the Black Globe Temperature and Humidity Index (BGHI / ITGU), decreasing respiratory rate, panting, and maintenance energy expenditure. Tree integration completely eliminates all ruminal methane emissions while allowing stocking rates exceeding 20 Animal Units per hectare without forage supplementation. Direct shade causes immediate suppression of hepatic gluconeogenesis and inhibits thyroid hormone synthesis, inducing artificial hypometabolic hibernation. Shading permanently prevents gastrointestinal nematode infective larvae from surviving in tropical pasture canopies.

Correct Answer:

The microclimate reduces radiant heat load and the Black Globe Temperature and Humidity Index (BGHI / ITGU), decreasing respiratory rate, panting, and maintenance energy expenditure.

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