CORLET, I. G.; http://lattes.cnpq.br/6034794107500622.; CORLET, Isaías Guilherme.
Resumo:
The success of an orchard is correlated with the production of seedlings with good genetic
quality and health, especially with regard to the longevity of the orchards. Therefore, the
objective was to evaluate the production of yellow passion fruit seedlings grown in different
organic substrates in the high sertão of Paraíba. The project was developed between March to
June 2022 in an agricultural greenhouse in the experimental area of the State University of
Paraíba, Campus IV, Catolé do Rocha-PB. The experimental design was completely
randomized with 20 treatments and 5 replications, totaling 100 plots. The substrates were the
different types of substrates: S1= 100% soil – control, S2= 50% soil and 50% cattle manure, S3=
50% soil and 50% goat manure, S4= 50% soil and 50% goat manure. earthworm, S5= 25% soil
and 75% cattle manure, S6= 25% soil and 75% goat manure, S7= 25% soil and 75% earthworm
humus, S8= 75% soil and 25% cattle manure, S9= 75 % soil and 25% goat manure, S10= 75%
soil and 25% earthworm humus, S11= 50% soil, 25% cattle manure, 25% sand, S12= 50% soil,
25% goat manure, 25% sand, S13= 50% soil, 25% earthworm humus, 25% sand, S14= 25% soil,
25% sand, 50% cattle manure, S15= 25% soil, 25% sand, 50% goat manure, S16= 25% soil, 25%
sand, 50% earthworm humus, S17= 50% soil and 50% sand, S18= 75% soil and 25% sand,
S19= 25% soil and 75% sand and S20= 40% soil, 20 % cow manure, 20% goat manure and 20%
earthworm humus. The soil used was Entisols (Fluvents), eutrophic not saline. On the day
before harvesting the experiment, gas exchange evaluations (photosynthesis, stomatal
conductance, transpiration) were carried out. and pH of the substrates. The data were submitted
to the Shapiro-Wilk error normality test and Bartlett's variance homogeneity test, and later, the
assumptions were met (p < 0.05). Thus, they were submitted to analysis of variance using the
F test with at least 95% confidence and the treatment means were compared using the ScootKnott test, with a 5% error probability. The best yellow passion fruit seedlings were formed
using the substrates S2= 50% soil and 50% cattle manure, S4= 50% soil and 50% earthworm
humus, S12= 50% soil, 25% goat manure, 25% sand and S16 = 25% soil, 25% sand, 50%
earthworm humus. The ideal proportion of goat manure to the composition of substrates for the
production of yellow passion fruit is up to 25% by volume. The electrical conductivity of
substrates greater than 2.5 dS m-1 reduced growth, production and gas exchange in passion
fruit seedlings.