Growth and mineral nutrition of baru (Dipteryx alata Vogel) in nutrient solution

Diana S N Da Silva,Lucas A De Melo,Renato L G Macedo,Regis P Venturin,Cleber L Rodas,Nelson Venturin

doi:10.1590/1807-1929/agriambi.v20n12p1101-1106

Abstract

ABSTRACT This study analyzed the initial growth of baru in nutrient solutions with individualized omission of mineral nutrients in greenhouse. The experimental design was completely randomized with 13 treatments and four replicates: Complete Hoagland & Arnon solution and with individualized omissions of N, P, K, Ca, Mg, S, B, Cu, Fe, Mn, Mo and Zn. At 60 days the following morphological characteristics were evaluated: height, root collar diameter, number of leaves and number of leaflets. In addition, the Dickson quality index and root/shoot ratio were calculated and root dry matter, shoot dry matter and the contents and accumulations of nutrients in the shoots of the seedlings were analyzed. Analysis of variance of the collected data was performed using the computational program Sisvar. The growth of baru seedlings, except for the variable height, was influenced by the omission of nutrients in the nutrient solution and the main limiting nutrients are K, Ca, Mg, Fe, Mn, and Mo. The absorption of nutrients by baru plants occurs differently under the individualized nutritional omissions applied to the nutrient solution.

Highlights

The devastation of the Brazilian Cerrado started in the 1960s, resulting in the alteration of its biodiversity (Machado et al, 2014)
One of the limiting factors related to the production of seedlings of this species is the lack of knowledge on its nutritional requirements, which can compromise the success of projects of reforestation and recomposition of native areas (Sorreano et al, 2012)
The cultivation in nutrient solution consists in the conduction of crops without the use of soil, substituted by water, which transports the nutrients into the plants (Aprígio et al, 2012)

Summary

Introduction

The devastation of the Brazilian Cerrado started in the 1960s, resulting in the alteration of its biodiversity (Machado et al, 2014). This study aimed to analyze the growth and nutrition of baru (Dipteryx alata Vog.) seedlings in nutrient solution with individualized omission of mineral nutrients in greenhouse. The omissions of nutrients in the nutrient solution compromised the growth of baru plants and there was significant difference between the treatments for all analyzed variables, except for shoot height (H) (Table 1).

Objectives

Results

Conclusion