SILVA, G. H.; http://lattes.cnpq.br/1865692118915084; SILVA, Girlânio Holanda da.
Resumen:
This study evaluated the effect of different doses of organic matter and fertilizer PK
neem seedlings grown in co-product of vermiculite. The experiment was conducted in
5 L pots in the nursery at the Federal University of Campina Grande. Measurements
were made weekly height and diameter after 90 days of experiment. At the end, the
seedlings were separated into root, stem and leaves, then the material was placed in
an oven and subsequent weighing. The parameters evaluated were: height,
diameter, number of leaves, root length, IQD (Dickson quality index), AGR (absolute
growth rate) and TDM (total dry mass). The design used in the experiment was the
DIC with seven levels of organic matter (OM) (0, 5, 10, 15, 20, 25, 30%) and three
fertilization PK (Phosphorus and Potassium) (PK0, PK100, PK300) with four
replications. For doses of OM and fertilization was applied polynomial regression
grade 2 at 5% of probability. The results of the analysis of variance showed that there
were significant differences between all levels of treatment with OM through
regression testing on all variables, that for these variables, there was a positive
quadratic effect. However, all variables were not statistically different for PK and PK +
OM in all parameters evaluated. Thus, the species under study has no requirement
for chemical fertilizer in its early growth phase. The AGR values in doses of 10 and
15% of OM, respectively, showed the highest growth rates. Through values DQI and
TDM , the dose of 20% of OM in tailings vermiculite is ideal for producing neem
seedlings of good quality and vigor.