EFECTO DE LA SALINIDAD EN EL CRECIMIENTO Y ABSORCIÓN NUTRIMENTAL DE PLANTAS MICROPROPAGADAS DE NOPAL (Opuntia spp)
EFFECTS OF SALINITY ON GROWTH AND NUTRIENT UPTAKE OF MICROPROPAGATED PRICKLY-PEAR CACTUS (Opuntia spp) PLANTLETS.
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Micropropagated prickly-pear cactus (Opuntia spp.) plantlets from three cultivars identified to produce fruits (O. amyclaea Tenore), vegetable (O. ficus-indica Miller (L.)), and forage (O. ficus-indica Miller (L.)) were trasplanted from tissue culture containers to pots and transferred to greenhouse conditions to be grown in a semi-automatic hydroponic system. During the time of culture, four salinity levels (2, 7 12, and 17 milisiemens, mS) were set up to evaluate their effect on the kinetics of growth and nutrient uptake of the plantlets. Fresh and dry matter production (PMF and PMS, respectively), were determined from each treatment in whole plantlet samples and mineral uptake (N, P, K, Ca, and Mg), from the aerial portion at 44, 107, 169, and 209 days after transplanting. Plant mass production (PMF and PMS) varied according to the type of cultivar. Consistently, the forage cultivar had the highest averages for both variables (PMF= 255.52 g and PMS= 10.59 g), while the vegetable cultivar the lowest (PMF= 148.60 g and PMS=6.08 g). Independently to the cultivar type, the use of a nutrient solution with a salinity level of 2 mS produced the highest values of PMS (13.77 g), PMF (338.55 g), and nutrient extraction (N=35.4 mg, P=95.8 mg, K=2914.3 mg, Ca=117.3 mg, and Mg=233.9 mg) by the plantlets. When the salinity level was increased to 7, 12, and 17 mS all variables measured were drastically reduced. These observations are associated with a desbalance among cations and anions in the solution. Despite temperature was not considered a factor under investigation, we observed its great influence on plant growth.Keyworks: hidropony, fertigation, O. amyclaea T., O. ficusindica
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Calderón-Paniagua, N., Estrada-Luna, A. A., & Martínez-Hernández, J. d. (2001). EFFECTS OF SALINITY ON GROWTH AND NUTRIENT UPTAKE OF MICROPROPAGATED PRICKLY-PEAR CACTUS (Opuntia spp) PLANTLETS.. Revista Chapingo Serie Ciencias Forestales y del Ambiente, VII(2), 127-132. http://dx.doi.org/