Abstract
This study aims to evaluate the effect of substrates and container content on growth and quality of Peltophorum dubium seedlings. The design was completely randomized in a factorial arrangement (2 × 9), with two containers sizes (125 cm3 and 280 cm3) and nine substrates formulated from the mixture of subsoil (S), vermicompost (V) and commercial substrate (CS), in the following proportions (v:v): S100, V100, CS100, S75 + V25, S50 + V50, S25 + V75, CS75 + V25, CS50 + V50 and CS25 + V75, with nine replicates. We assessed seedling height, stem diameter, root and shoot dry matter, height/shoot dry matter ratio; Dickson quality index; and percentages of nitrogen, phosphorous and potassium in the shoot. The use of the 125 cm3 dibble tube containing 100% vermicompost allowed for higher quality of Peltophorum dubium seedlings.
Highlights
AND OBJECTIVESThe production of seedlings of native tree species has been studied with greater emphasis in recent years
This study aims to evaluate the effect of substrates and container content on growth and quality of Peltophorum dubium seedlings
The design was completely randomized in a factorial arrangement (2 × 9), with two containers sizes (125 cm3 and 280 cm3) and nine substrates formulated from the mixture of subsoil (S), vermicompost (V) and commercial substrate (CS), in the following proportions (v:v): S100, V100, CS100, S75 + V25, S50 + V50, S25 + V75, CS75 + V25, CS50 + V50 and CS25 + V75, with nine replicates
Summary
The production of seedlings of native tree species has been studied with greater emphasis in recent years. In Brazil, this increase stems from the demand for native species to fulfill the set of protectionist measures contained in Law No 12,651, of May 25, 2012 (Brasil, 2012). Seedling quality is crucial to establish plantation forests (Trigueiro & Guerrini, 2014). One of the promising native species for forest recovery is Peltophorum dubium (Spreng.) Taub. (canafistula), a legume with wide geographic distribution, and undemanding in fertility and soil moisture, potentially associated with atmospheric nitrogen-fixing bacteria, which improves and recovers soil fertility (Carvalho, 2003). According to Carvalho (2003) and Vivian et al (2010), this is a fast-growing tree species, and it can be used to reforest degraded areas, landscaping, civil construction and carpentry
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