Desenvolvimento inicial do mogno africano (Khaya ivorensis a. Chev.) submetido a diferentes saturações por bases e níveis de nitrogênio, fósforo e potássio
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2015-03-30
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Universidade Federal de Goiás
Resumo
Global demand for wood is growing every day. In Brazil, the wide availability of area, favorable
climate and soil conditions for the plant, made possible investment in forest monocultures. Among
the species of hardwood, African mahogany (Khaya ivorensis A. Chev.) Is the one with physical
and mechanical characteristics closer to Brazilian mahogany (Swietenia macrophylla). Due to
resistance attack on Hypsipyla grandella has been a viable service to the international furniture
market. However, little is known about the culture, particularly their nutritional requirements. This
study aimed to evaluate the development of Khaya ivorensis in different base saturation levels and
levels of nitrogen, phosphorus and potassium. For this, an eight-hectare area in which four hectares
had the high saturation bases to 55% and the remaining 75% was used. The experimental design
was a randomized block design with eight replications in factorial 4 x 4 x 4, with four levels of
nitrogen (60g, 120g, 180g and 240g of urea), four doses of phosphorus (60g, 120g, 180g and 240g
super triple phosphate) and four potassium doses (42g, 84g, 126g and 168g of potassium chloride).
The base saturation was evaluated in the block effect. After twelve months of planting were
performed dendrometric reviews. The basal diameter was measured with a digital caliper and
height with tape. Each plot consisted of six plants and averaging them considered in the statistical
analysis. In stem diameter was no statistical difference between blocks and nitrogen. However, this
difference may be related to genetics of plants, since the plant is young and seminal seedlings were
used. At the time only the NPK ratio presented statistical variation. However, growth decreasing
trend was observed with the increase of N rates and improved with increasing doses of P and K. All
treatments favored the growth of African mahogany. The most suitable foundations saturation is
55%, since there is no improvement in the growth of plants is high when V% to 75%. Excess N
affect the growth of the species. The best treatment was that received 60g of urea, 240g and 168g
ST KCl.
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MUNIZ, Camilla Oliveira. Desenvolvimento inicial do mogno africano (Khaya ivorensis a. Chev.) submetido a diferentes saturações por bases e níveis de nitrogênio, fósforo e potássio. 2015. 51 f. Dissertação (Mestrado em Agronomia) - Universidade Federal de Goiás, Agronomia, 2015.