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SUBSTRATE CONDITIONERS FOR PRODUTION OF ORGANIC CUPUASU SEEDLING

ABSTRACT

The objective of this study was to evaluate the quality and biomass of cupuassu plants on substrates with different conditioners. The experiment was conducted in the Ecological Site Seridó, Rio Branco, Acre State, Brazil. The treatments were a change of conditioner substrates, as follows: T1 = carbonized rice husk; T2 = coconut fiber; T3 = stem of palm; T4 = waste kapok and T5 = organic composte. T1, T2, T3 and T4 substrates were made by land (30%), organic compound (30%), fine coal (10%) and conditioners (30%). The substrate (T5) was considered a control with a higher proportion of land (45%) and organic compound (45%) plus addition of the fine coal (10%). All substrates were added to 1.0 kg m-3dolomitic limestone and 1.5 kg m-3 natural thermo. The experimental design was a randomized block design with five treatments and four replications of three plants each. The numbers of leaves, root, shoot and total dry matter, plant height and seedling quality index development were assessed at 120 days after sowing. The substrates containing coconut fiber, palm stalk fiber and the organic composte are viable alternatives as conditioners substrate for cupuassu seedling.

Index terms
Theobroma grandiflorum Schum; Quality; Propagation

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