Influência de bioativadores e bioestimulantes na produção de mudas de cafeeiros

Fertigation and growth regulator on coffee seedling production in tubes

“…In this study, the biometric data demonstrated a good plant development at 120 DAP. The growth parameters used were similar to those reported by Marana et al (2008) andDer Vliet et al (2009) for 150-day-old coffee seedlings and by Melo & Maciel (2014) at 189 DAP. The beneficial effect of the higher electrical conductivity of the nutrient solution on growth is likely due to the greater supply of nutrients to the plants, since electrical conductivity was raised by increasing the fertilizer concentration in the nutrient solution.…”

“…Another advantage of growing coffee seedlings in smaller containers (50 cm 3 or 120 cm 3 ) is a greater plant adherence to the substrate, which does not break up during planting (Favarin et al 2008). However, when comparing the root data obtained here in 50 cm 3 tubes (root length = 12.7 cm; root dry mass = 0.23 g) with those reported by Marana et al (2008) in 120 cm 3 tubes (root dry mass = 0.24 g) and data from studies that used larger containers, such as 180 mL tubes (Der Vliet et al 2009; root dry mass = 0.72 g) and 18 cm x 4 cm bags (Melo & Maciel 2014; root length = 18.9 cm; root dry mass = 0.74 g), it can be inferred that smaller containers may restrict root growth.…”

“…In seedlings deemed too old (18 months), after 10 months of cultivation in a nursery, Stimulate ® increased the stem diameter only in the treatment with burned coffee husk substrate (Ferreira et al 2015). On the other hand, Stimulate ® associated with thiamethoxam and triadimenol did not favor the coffee seedling growth up to 189 DAP (Melo & Maciel 2014). Stimulate ® applied to seeds (10 mL kg -1 ) also failed to promote growth in coffee seedlings evaluated at 150 DAP (Der Vliet et al 2009).…”

“…shortening the coffee seedling production process. These include the use of seed germination techniques (Meireles et al 2007, Lima et al 2012, tubes and quality substrates, different fertilization practices (Müller et al 1997, Ferreira 2014, Tomaz et al 2015, biostimulants and growth regulators (Guimarães 1995, Melo & Maciel 2014.…”