01905naa a2200277 a 450000100080000000500110000800800410001902200140006002400340007410000240010824501240013226000090025652010890026565000280135465000280138265000130141065000130142365000150143665300200145165300150147170000200148670000230150670000230152970000200155277300550157221137002020-01-22       2019    bl uuuu     u00u1 u    #d  a2179-80877 a10.1590/2179-8087.0348182DOI1 aBARROS, J. P. A. de  aPartitioning and modeling of biomass in Caatinga legume seedlings in different water conditions.h[electronic resource]  c2019  aThe accumulation of dry biomass, its partitioning and the adjustment of equations were assessed for the initial growth of Piptadenia stipulacea (Benth) Ducke and Anadenanthera colubrina (Vell.) Brenan under water availability variation. The experiment was conducted in pots arranged in a completely randomized design with three replicates. Water conditions were evaluated using the percentages of reference evapotranspiration. Samples of the biomass were taken at 10-day intervals and used for the achievement of partitioning data and model adjustments. The short period of water scarcity in the initial growth phase of P. stipulacea and A. colubrina does not affect the establishment of these species, but different water regimes alter their root growth dynamics. The A. colubrina allocates more dry matter to the roots, while P. stipulacea sends more dry matter to the aerial part. The Gaussian, Lorentzian, Log-Normal and Gompertz models had excellent adjustments for the biomass variables of the P. stipulacea species, whereas for A. colubrina, we recommend the Exponential model.  aAnadenanthera colubrina  aDry matter accumulation  aBiomassa  aCaatinga  aLeguminosa  aDeficit hidrico  aSemiárido1 aSOUZA, L. S. B.1 aSILVA, T. G. F. da1 aMOURA, M. S. B. de1 aSILVA, L. F. da  tFloresta e Ambientegv. 26, n. 4, e20180348, 2019.