02410naa a2200265 a 450000100080000000500110000800800410001910000220006024501890008226000090027152015700028065000110185065000200186165000130188165000160189465000250191065000210193565300270195665300320198365300290201570000220204470000180206670000210208477300390210521310972023-01-17       2021    bl uuuu     u00u1 u    #d1 aPEREIRA, J. de S.  aForage yield, structural responses and chemical composition of spineless cactus Orelha de Elefante Mexicana in different water depths and irrigation frequencies.h[electronic resource]  c2021  aThe objective was to evaluate the effects of water depths and irrigation frequencies on structural responses, forage yield and chemical composition of spineless cactus Orelha de Elefante Mexicana (OEM) (Opuntia stricta (Haw.) Haw), in adensed crop system. The experimental design was randomized blocks, in subdivided plots (3x4) with 4 replicates. The water depths were (100%, 75%, 50%, and 25% of ETc - crop evapotranspiration) and three water application frequencies (7; 14 and 28 days between irrigations). There was interaction for water use efficiency (WUE) and plant dry mass. Increasing water depths reduced WUE for all irrigation frequencies and plant dry mass was lower for 7 days compared to 14 and 28 days in 25% ETc. Greater water depths increased linearly the plant height and plant width. First and second order cladode length, second order cladode dry mass (kg), fresh mass yield (FMY) (kg ha-1) and dry mass yield (DMY) (kg ha-1) had a quadratic response with the increase in water depth. The FMY and DMY increased up to 77% and 75% ETc, respectively. Irrigation frequency (28 days) promoted greater first order cladode length and cladode dry mass compared to 7 days. Cladode thickness in plant and basal cladode thickness were greater for 7 days compared to 28 days and 14 and 28 days, respectively, without influence on FMY and DMY. Irrigation frequencies from 7 to 28 days promotes similar forage production and water depths up to 77% ETc favors the forage yield for spineless cactus Orelha de Elefante Mexicana receiving supplemental irrigation.  aForage  aOpuntia stricta  aForragem  aIrrigação  aOpuntia Ficus Indica  aPalma Forrageira  aLâmina de irrigação  aOrelha de Elefante Mexicana  aSuplementação hídrica1 aCAVALCANTE, A. B.1 aSIMOES, W. L.1 aVOLTOLINI, T. V.  tCiência Ruralgv. 51, n. 5, 2021.