Name: RENAN GARCIA MALIKOUSKI
Publication date: 22/02/2019
Advisor:
Name |
Role |
|---|---|
| EDILSON ROMAIS SCHMILDT | Advisor * |
Examining board:
| Name |
Role |
|---|---|
| EDILSON ROMAIS SCHMILDT | Advisor * |
| IVONEY GONTIJO | Internal Examiner * |
Summary: The papaya (Carica papaya L.) is one of the most important crops of the national
agricultural scene and in the state of Espírito Santo, WHERE the state is among the
leaders in fruit production and productivity. This prominent position made it possible
for companies in the branch to envision new farming systems and possible
technologies to be inserted in the region. In order to obtain greater plant compactness,
a cross was carried outs between the varieties Baixinho de Santa Amália and Golden
Pecíolo Curto, genotypes derived from 'Sunrise Solo' mutations, characterized by low
stature and reduced leaf petiole respectively. Among the genotypes obtained in the
segregating generation F2, some of the characteristics of interest that were selected
and cultivated for composition of the following generation, F2:3, were highlighted. These
were inserted in two groups for leaf coloring, the Golden Ornamental Bauble (BOG),
light green and Baixinho Ornamental Sunrise (BOS), dark green. Thus, the work
divided into two chapters aimed to evaluate the progenies obtained by stating the
stabilization of the vegetative characteristics that confer the reduction of the
architecture of the plant and the viability of the cultivation of this material to a new
technology proposed, the cultivation in pot. In the first chapter eight progenies of thexi
cross were evaluated, together with the initial parents and a commercial variety,
Golden THB. It was measured plant height, first fruit insertion height, petiole length,
number of commercial fruits, as well as physico-chemical analyzes in fruits, such as
length and width, mass, pulp firmness and soluble solids content. The non-parametric
Kruskal-Wallis variance analysis was performed and the Student-Newman-Keuls test.
The characteristics plant height, petiole length, fruit length and width stabilized in
generation F2:3. Already number of commercial fruits, fruit mass, pulp firmness and
soluble solids content require more generations of self-fertilization in order to stabilize.
In the second chapter, the objective was to determine the dosage of the controlled
release fertilizer and the polynomial mathematical growth model of the BOG papaya
until the flowering phase, grown in pots, under the protected environment condition.
Thus, the fertilizer called Basacote® Starter was applied in the doses of 25, 75, 125,
175 and 225 g per pot of 25 dm³ of volume in plants grown under greenhouse
conditions. A completely randomized design was used in a plot of time split plot 5x8, 5
fertilizer doses and 8 evaluation periods, with 17 replicates each treatment and the
experimental plot consisting of one pot. The following characteristics were evaluated:
plant height; stem diameter; leaf area; chlorophyll index and at the end of the
evaluations the dry mass of root and shoot was determined. The ideal dose of
Basacote® Starter to full flowering was 123 g per pot. The growth curve for plant height
as a function of time follows a third degree polynomial model, and for the leaf area and
stem diameter characteristics, the appropriate polynomial model was the first degree
Key words: Carica papaya L., papaya improvement, progeny evaluation, cultivation
in pot, controlled release fertilizer.
