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Acclimatization of Agave angustifolia Haw. vitroplants in inert substrates and fertigated with different nutrimental dose

Enríquez-del Valle, J.R., Cruz-Valdez, I., Carrillo-Castañeda, G.
Acta horticulturae 2012 no.947 pp. 101-104
Agave angustifolia, acclimation, fertigation, leaves, plant development, trays
Micro-propagated Agave angustifolia plants had 3.8 leaves, the bigger leaf with 10.6 cm long by 0.9 cm wide, accumulated dry matter 140.2 mg (aerial part) and 16.7 mg (root) on average. A total of 240 plants were used and 120 of them were established in trays divided in 50 cavities of 60 cm3 containing a substrate with sand-vermiculite (1:1) the remainder 120 plants were established in sand-perlite (1:1). The plants in each substrate were separated in five groups to apply them for 70 days fertigation with some aliquot: 0.05 (C1), 0.33 (C2), 0.66 (C3), 1.0 (C4) and 1.33 (C5) of Steiner's universal solution. The experiment was established in accordance to completely randomized design with factorial arrangement (two substrates × five nutriments concentrations) given 10 treatments. The experimental unit was one plant and there were 24 replications per treatment. All the plants were adapted but the level of plant development and N, P and K accumulated in leaves increased according the nutriment concentration in the nutritive solution up to the optimum of 0.66 and 1.0. The smallest plants were those established in sand-perlite, fertigated with C1, and the biggest plants were established in sand-vermiculite, fertigated with C3, which had 4.5 and 5.3 leaves with 11.0 and 14.7 cm long by 6.7 and 18.2 mm wide; the accumulated dry matter was 540 and 1020 mg (aerial part); 152 and 374 mg (root); 7 and 15 mg of N; 2.2 and 3.1 mg of P; 7.9 and 28.8 mg of K/g of foliar dry matter, respectively.