GROWTH OF Mimosa caesalpiniifolia Benth., UNDER SHADE IN THE NORTHEAST SEMI-ARID REGION OF BRAZIL

José Rivanildo De Souza Pinto,Jeferson Luiz Dallabona Dombroski,Romulo Magno Oliveira De Freitas,Gabriela Oliveira De Souza,José Hermogenes Dos Santos Junior

doi:10.1590/1983-21252016v29n215rc

José Rivanildo De Souza Pinto, Jeferson Luiz Dallabona Dombroski + Show 3 more

Open Access

https://doi.org/10.1590/1983-21252016v29n215rc

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Abstract

ABSTRACT: Seedling production for reforestation aims to achieve the best plant growth in a minimal amount of time, to provide good survival and growth levels after transplantation. During cultivation, it is necessary to know the shading levels that lead to the best growth. The objective of this study was to assess the growth of young Mimosa caesalpiniifolia Benth. plants provided with various amounts of shade in the northeast semi-arid region of Brazil. Four types of shade cloth were tested (0, 30, 50 and 70%). Shoot length, stem diameter, stem dry matter, leaf dry matter, total dry matter and leaf area were assessed. Leaf area ratio, specific leaf area, absolute growth rate, relative growth rate and net assimilation rate were also calculated. The different shading levels affected M. caesalpinifolia growth, with the best growth indicators observed in plants grown under 50% shade, with increases in plant height, leaf area and total dry matter observed compared to the full sun condition.

Highlights

Seedling production is a technique used to speed up plant production by enabling the early stages of seedling development, in which plants are more sensitive and more responsive, to be conducted under controlled conditions
It is necessary to understand the main aspects of seedling production in nurseries in order to know which conditions are most favourable for the propagation of a species (SANTELICES; ESPINOZA; CABRERA, 2015)
Results obtained by Câmara and Endres (2008) show that 60 days after seedling emergence M. caesalpiniifolia plants under 50 and 70% shade were taller than plants grown under full sun

Summary

Introduction

Seedling production is a technique used to speed up plant production by enabling the early stages of seedling development, in which plants are more sensitive and more responsive, to be conducted under controlled conditions. It is necessary to understand the main aspects of seedling production in nurseries in order to know which conditions are most favourable for the propagation of a species (SANTELICES; ESPINOZA; CABRERA, 2015). This technique aims to provide conditions that promote maximum growth, allowing good quality seedlings to be obtained in a minimal amount of time. The same environmental factors that cause light reduction can decrease temperature and wind speed, affecting the microclimate of the plants and their growth in a complex way (CANTU et al, 2013)

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Results