PRE-IRRIGATION WITH GEL HIDRORETENTOR IN EUCALYPTUS SEEDLING ESTABLISHMENT IN THE FIELD

Lynniker Trés Bernardino,Moises Zucoloto,Joabe Martins De Souza,Robson Bonomo

doi:10.5380/rf.v49i3.56245

Abstract

Research has sought new technologies aimed at establishing more productive forests. Hidroretentor gel that has the function of increasing the availability of water to the plant, in the most critical stage of establishment of the cuttings in the field. The objective of this study was to evaluate increasing levels of water retention gel applied in pre-irrigation, moments before planting, observing the survival index, and the morphological variables for the hybrid Eucalyptus grandis x E. urophylla-03, in Chapadinha-MA. The experiment was a randomized block with seven treatments and three replicates. The treatments consisted of five increasing doses of 1.0; 2.0; 3.0; 4.0 and 5.0 g 5 L-1 gel solution per liters of pre-irrigation, a treatment without the use of the gel; and a conventional planting treatment. The use of pre-irrigation with hidroretentores polymers, known as hidroretentor gel at a concentration of 4 and 5g 5L-1, provides a greater height, stem diameter, increasing the growth of eucalyptus plants in post-planting. The depth of the root system did not improve when a higher dose of gel was used, obtaining lower values than those obtained by the treatment without the use of the hidroretentor gel.

Highlights

Species of the genus Eucalyptus have shown great potential, considering the versatility of wood use for numerous applications, mainly for industrial purposes, causing several companies to seek to improve their breeding programs, ensuring the establishment of highly productive plantations (SOUZA; PERES, 2016).The availability of water for the development of plants is a fundamental and determinant factor, since scarcity or excess affects the growth of plants
The objective of this work was to evaluate increasing doses of hidroretentor gel applied in preirrigation, observing the survival index and morphological parameters of the hybrid Eucalyptus grandis x E. urophylla-03
Among the treatments applied only T1, without pre-irrigation and without the use of hidroretentor gel at the time of planting, presented value less than 95% (89.47%) of seedling survival

Summary

Introduction

Species of the genus Eucalyptus have shown great potential, considering the versatility of wood use for numerous applications, mainly for industrial purposes, causing several companies to seek to improve their breeding programs, ensuring the establishment of highly productive plantations (SOUZA; PERES, 2016). The availability of water for the development of plants is a fundamental and determinant factor, since scarcity or excess affects the growth of plants. Irrigation during planting and after the first weeks is of recognized importance in commercial plantations, especially in times when climatic conditions are not favorable to establishment and development (BUZETTO et al, 2002).

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