01911naa a2200253 a 450000100080000000500110000800800410001902400330006010000190009324501770011226000090028952011180029865000190141665000150143565000140145065300400146470000240150470000200152870000200154870000160156870000170158470000180160177300380161921228432020-06-01       2020    bl uuuu     u00u1 u    #d7 adoi:10.3390/ani100407342DOI1 aSALGADO, L. C.  aIncrease in milk yield from cows through improvement of forage production using the N2 Fixing legume leucaena leucocephala in a silvopastoral system.h[electronic resource]  c2020  aThe objective was to evaluate milk production, N2-?xation and N transfer, forage yield and composition (under two cutting intervals) in a silvopastoral system (SPS) with Leucaena leucocephala-Megathyrsus maximus and M. maximus-monoculture (MMM) with crossbred cows in a completely randomized design. Forage yield in the SPS was 6490 and 6907 kg DM ha?1 for cutting intervals (CI) of 35 and 50 days. Forage yield for the MMM was 7284 and 10,843 kg DM ha?1, and forage crude protein (CP) was 29.0% and 26.1% for L. leucocephala, harvested at 35 and 50 days, respectively. CP for the associated M. maximus was 9.9% and 7.8% for CI 35 and 50 days, respectively, and for MMM was 7.4% and 8.4%, harvested at 35 and 50 days. Milk production was 4.7 kg cow?1 day?1 for cows grazing MMM and 7.4 kg cow?1 day?1 under SPS. Nitrogen ?xation in L. leucocephala (%Ndfa) was estimated to be 89% and 95%, at 35 and 50 days, with an N2 transfer to the associated grass of 34.3% and 52.9%. SPS has the potential to ?x and transfer important amounts of N2 to the associated grass, and increase forage CP content and milk production.  aClimate change  aDry season  aLivestock  aFixação biológica de nitrogênio1 aSOLORIO-SANCHEZ, F.1 aRAMIREZ-AVILÉS1 aALVES, B. J. R.1 aKU-VERA, J.1 aURQUIAGA, S.1 aBODDEY, R. M.  tAnimalsgv. 10, p. 734-787, 2020.