02655naa a2200325 a 450000100080000000500110000800800410001902400520006010000240011224501580013626000090029452016770030365000150198065000220199565000130201765000140203065300090204465300360205365300350208965300210212465300260214565300130217170000130218470000200219770000220221770000170223970000230225670000180227977300320229721661742024-09-19       2024    bl uuuu     u00u1 u    #d7 ahttps://doi.org/10.1007/s10457-024-01038-y2DOI1 aPEZZOPANE, J. R. M.  aBasal area as a strategic indicator for forest component management in silvopastoral systemsbinsights from long-term experiments.h[electronic resource]  c2024  aThis study aimed to evaluate the efect of tree shading in silvopastoral systems (SPS) on forage production through long-term experiments, as well as to determine the correlation between dendrometric variables of eucalyptus trees and transmission of photosynthetically active radiation (PAR) to establish thereby the optimum forest cover for efective management in these systems. We evaluated four SPSs in São Carlos, SP (21° 57′ 42″ S, 47° 50′ 28″ W, 854 m.) and Campo Grande, MS (20° 24′ 55″ S, 54° 42′ 26″ W, 530 m.), Brazil, considering various factors such as tree age, management, and density. The systems included pastures with eucalyptus (Eucalyptus urograndis) or corymbia (Corymbia citriodora) trees planted in single rows at densities ranging from 83 to 357 trees ha−1. During the rainy season, from October to March, we analyzed the correlation between PAR transmission and relative forage production (forage production in the SPS/forage production in full sun), as well as the correlation between dendrometric variables, such as diameter at breast height, volume and basal area per unit area and PAR transmission. The results showed a linear reduction in production in the SSPs due to the decrease in PAR transmission. The strongest correlation between tree growth and PAR transmission was obtained with the basal area per hectare variable (r=−0.91). Thus, this study successfully established a linear relationship between basal area per hectare and PAR transmission, providing insights for the implementation of tree thinning management in SPSs to maintain the productive potential of forage plants in the understory of these systems.  aEucalyptus  aForest management  aDesbaste  aEucalipto  aILPF  aIntegração pecuária-floresta  aLivestock-forestry integration  aManejo florestal  aSistema silvipastoril  aThinning1 aBOSI, C.1 aBRUNETTI, H. B.1 aALMEIDA, R. G. de1 aLAURA, V. A.1 aOLIVEIRA, C. C. de1 aMULLER, M. D.  tAgroforestry Systems, 2024.