03010naa a2200505 a 450000100080000000500110000800800410001902200140006002400560007410000280013024501240015826000090028252015020029165000170179365000210181065000200183165000160185165000360186765000310190365000170193465000250195165000210197665000240199765000220202165000220204365000150206565000110208065300230209165300220211465300090213665300430214565300450218865300160223365300130224965300240226270000170228670000130230370000170231670000190233370000230235270000240237570000220239970000240242177300590244521249612020-09-16       2020    bl uuuu     u00u1 u    #d  a0306-45657 ahttps://doi.org/10.1016/j.jtherbio.2020.1026362DOI1 aMAGALHÃES, C. A. de S.  aImprovement of thermal comfort indices in agroforestry systems in the southern Brazilian Amazon.h[electronic resource]  c2020  aAgroforestry systems can minimize heat stress and improve cattle welfare, but the influence of the forest component in microclimatic changes in the southern Amazon remains unclear. This study aimed to compare the thermal comfort indices in grass monoculture and integrated systems. The three systems were pasture under full sunlight (PFS), integrated (triple-row) livestock-forestry (ILFT), and integrated (single-row) livestock-forestry (ILFs), across four seasons, for two years, from June 2017 to June 2019. We assessed photosynthetically active radiation (PAR), air temperature, relative humidity, black globe temperature, and wind speed. Thermal comfort indices such as temperature-humidity index (THI), black globe temperature-humidity index (BGHI), and radiant thermal load (RTL) were calculated based on microclimate data daily-collected from 8:00 to 16:00. The ILFT mean THI (76.8) was slightly lower than ILFS and PFS. The BGHI and RTL values decreased as shading increased (PFS &gt ILFs &gt ILFT). The most challenging heat stress conditions for grazing animals occurred predominately during winter and autumn. In conclusion, the presence of trees in pastures of the southern Amazon improved the microclimate and, consequently, the thermal comfort indices. Agroforestry systems can foster an environment with a more suitable thermal comfort or less restrictive to animal performance, which contribute to mitigating global climate change for forage-livestock systems in Brazilian Amazon.  aAgroforestry  aAnimal husbandry  aFarming systems  aHeat stress  aIntegrated agricultural systems  aIntegrated crop management  aMicroclimate  aTropical agriculture  aTropical forests  aTropical grasslands  aTropical pastures  aFloresta Tropical  aMicroclima  aStress  aAgrossilvipastoril  aConforto térmico  aILPF  aIntegração lavoura-pecuaria-floresta  aIntegrated crop-livestock-forest systems  aMato Grosso  aSinop-MT  aSistemas integrados1 aZOLIN, C. A.1 aLULU, J.1 aLOPES, L. B.1 aFURTINI, I. V.1 aVENDRUSCULO, L. G.1 aZAIATZ, A. P. S. R.1 aPEDREIRA, B. C. e1 aPEZZOPANE, J. R. M.  tJournal of Thermal Biologygv. 91, n. 1, 102636, 2020.