01790naa a2200229 a 450000100080000000500110000800800410001910000160006024500970007626000090017352011380018265300140132065300160133465300120135065300230136270000190138570000170140470000240142170000190144570000190146477300770148311272932018-05-24       2018    bl uuuu     u00u1 u    #d1 aLONE, A. B.  aShading levels in the development of dragon fruit (pitaya) nurseries.h[electronic resource]  c2018  aThe objective of this work was to evaluate the rooting and sprouting of pitaya (Hylocereus undatus) cuttings under different shading levels. Shades obtained by screen were: 37.8%, 49.6%, 86.3%, and under the sun. The following characteristics were analyzed: cuttings survival (%), shooting (%), number of shoots, shoots average length (cm), shoots dry matter (g), rooted cuttings (%), root average length (cm), root volume (mL), root dry matter (g), and chlorophyll concentration a and b (mg g-1). Survival percentage means were between 90 and 100%. Responses for shooting and shoots dry matter were quadratic, with maximum point at 23.48% and 42.7 % of shading, respectively. In regards to cuttings rooting, means were between 80 and 95%. Root volume and root dry matter showed linear reduction according to shading level. Chlorophyll contents a and b showed linear increase in function o shading level. Partial shading ( between 23 and 42%) increased the percentage of cuttings with shoots, the accumulation of dry matter on them, and affected volume and dry matter accumulation on roots in pitaya nurseries propagated by cuttings.  aCactaceae  achlorophyll  acutting  aHylocereus undatus1 aCOLOMBO, R. C.1 aSILVA, C. M.1 aTAKAHASHI, L. S. A.1 aINAGATI, A. T.1 aROBERTO, S. R.  tAgronomy Science and Biotechnology, Londrinagv. 4, n. 1, p. 8-13, 2018.