Germination and Initial Seedling Growth of Schizolobium amazonicum on Different Substrates and Irrigation Depths

Maria De Fátima De Castro Oliveira,Jhonata Santos Santana,Cristiane Matos Da Silva,Wilson Araújo Da Silva,Alinne Silva

doi:10.1590/2179-8087.104917

Maria De Fátima De Castro Oliveira, Jhonata Santos Santana + Show 3 more

Open Access

https://doi.org/10.1590/2179-8087.104917

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Abstract

Abstract Due to the good silvicultural characteristics of Schizolobium amazonicum (parica) and its versatility (planting and use), the species has become an alternative in commercial exploitation. Aiming to verify the influence of irrigation depth and substrate on the germination and growth of Parica seedlings, a greenhouse experiment was conducted using randomized blocks in a 2 × 4 bifactorial scheme, with two types of substrates (washed sand and commercial substrate) and four irrigation depths corresponding to 50%, 100%, 150% and 200% of the reference evapotranspiration (ETo), with five replications. Germination rate, emergency speed index and biometric variables were evaluated. The commercial substrate combined with the irrigation level of 50% of ETo favored a higher emergence speed and germination rate. In the growing phase, the irrigation level of 150% of ETo combined with the commercial substrate produced better results, indicating greater survival and development in the field.

Highlights

AND OBJECTIVESThe demand for products and services that cause minimum impact to the environment has been a recurring theme in recent years, highlighting the use of planted forests
Aiming to verify the influence of irrigation depth and substrate on the germination and growth of Parica seedlings, a greenhouse experiment was conducted using randomized blocks in a 2 × 4 bifactorial scheme, with two types of substrates and four irrigation depths corresponding to 50%, 100%, 150% and 200% of the reference evapotranspiration (ETo), with five replications
The experiment was installed in a randomized complete block design (RBC) in a 2 × 4 bifactorial scheme consisting of two substrate compositions (S1 and S2), with S1 being washed sand and S2 commercial substrate composed of a mixture of pine bark and coconut fiber, as well as four irrigation levels (L1, L2, L3 and L4) corresponding to 50%, 100%, 150% and 200% of the reference evapotranspiration (ETo), with five replications, totaling 40 experimental units

Summary

Introduction

The demand for products and services that cause minimum impact to the environment has been a recurring theme in recent years, highlighting the use of planted forests. According to Indústria Brasileira de Árvores (IBÁ, 2016), only 90,047 hectares of Parica plantations (Schizolobium amazonicum Huber ex Ducke) were distributed in the states of Pará, Maranhão and Tocantins in 2015, applied to the production of laminated wood and plywood, linings, toothpicks, paper, furniture, finishing and frames (ABRAF, 2013). According to Almeida et al (2013), the species has been among reforested species in Brazil, as it has increases in height and diameter that allow its use after planting with similar time to exotic species. The availability of water and substrate are limiting factors in seedling production, as their excess and/or absence is harmful

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