PIMENTEL, J. V. F.; http://lattes.cnpq.br/2810513855063432; PIMENTEL, João Vianey Fernandes.
Resumo:
The cumaru, Amburana cearensis (Allem.) B.C. Smith, is a native plant of multiple uses,
with excellent economic potential, since besides producing wood with exceptional quality,
it can be used by the food, perfume and drink industries, being also able to produce active
principles for medicines. Considering the lack of management information about this
culture an experiment was carried out, on March-August of 2008, in nursery aiming to
study the effects of irrigation, organic manuring and mulching on the cumaru seedlings
growing. The seedlings growth on 5,95 L pots on which were established 5 different
quantities of water, calculated in function of the evapotranspiration rate (0,25 ET, 0,50
ET, 0,75 ET, 1,00 ET and 1,25 ET); 3 levels of organic manuring, as fraction of the total
volume of the ground (0,25; 0,50; 0,75); and on presence and absence of mulching. The
experimental design adopted was in blocks completely at random, with 4 repetitions. The
irrigations were done to each two days. The transplant of the seedlings was carried out to
56 days after the sowing and the irrigation treatments 30 days later. Hundred forty seven
days after the seedling it was observed that the plant height was not affected by the levels
of water, being influenced positively by the manuring and mulching, still being affected
by the interaction water x manure. The steam diameter and the number of leaves were not
affected by the treatments however the stem diameter was affected by the interaction of
water x manure. The absolute and relative growth rate of the plant height and stem
diameter were not by the treatments, only the interaction water, manure and mulching
affected the absolute growth rate of the plant height. The irrigation water consumption and
the evapotranspiration decreased with the manure doses and in the presence of mulching.
The values of the Coefficient of Culture varied with the treatments a with time period. A
mean coefficient of 0.39 was obtained for all the treatments and studied periods.
Considering that the cumaru is a plant highly adapted to water stress, surviving and
growing with very small quantities of water, it must be better studied and utilized on the
semi-arid agro-forests.