Utilização de passivo ambiental como substrato para produção de mudas de Khaya lvorensis A. CHEV
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2017-02-23
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Universidade Federal de Goiás
Resumo
African mahogany (Khaya ivorensis A. Chev) is a forest species that provides high quality
wood and is an alternative to Brazilian mahogany (Swietenia macrophylla King). Little is
known about its behavior if propagated in different substrates, and the present research has the
objective of using an environmental liability from industrial activity of potato bark (Solanum
tuberosum L.) to produce seedlings of African mahogany. The use of industrial and urban
waste, produced in increasing amounts, has been feasible in numerous studies and its use is an
alternative to its disposal in the environment. A substrate 1 (S1-compound (50%) and sand
(50%)), substrate 2 (S2-organic compound (100%)) was used in the experiments. ), Substrate
3 (S3-commercial substrate) and substrate 4 (S4-sand (100%)), which were analyzed
chemically before sowing at 30 and 120 days evaluating the macronutrients Carbon, Nitrogen,
Phosphorus, Potassium, Calcium, Magnesium And Sulfur, micronutrients Boron, Iron,
Manganese, Copper and Zinc, hydrogenation potential (pH), and physical (moisture). In the
African mahogany seedlings in the field, height (H), diameter of colon (DC), fresh mass
(MF), dry mass (DM) and foliar analysis (AF) were verified at 30, 75 and 120 days, in order
to identify the Quality of the seedlings in the different treatments. Mahogany seeds presented
germination of 62% in the laboratory, allowing to consider the storage period of at least five
months and low quality of the batch under study. In the field, 59%, 64%, 60% and 60%,
respectively, were obtained in S1, S2, S3 and S4, indicating that there was no great influence
on germination in any of the substrates used. The first chemical analyzes of the treatments
showed good nutritional loads, water retention capacity, pH close to those considered
satisfactory. The C / N ratio was shown to be low in S1 and S2 at the beginning, and at 120
days in S3 o could evidence competition for the N available between the plants and the
microorganisms of the substrate causing nutrient deficiency. The Dunn test for H, DC, MFT,
MFR, MFA, MST, MSR, and MSA indicated larger averages and significant differences in S1
and S2 when compared to S3 and S4 evidencing the high efficacy of the organic compound in
the production of African mahogany seedlings.
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SILVA JUNIOR, A. R. Utilização de passivo ambiental como substrato para produção de mudas de Khaya lvorensis A. CHEV. 2017. 86 f. Dissertação (Mestrado em Agronegócio) - Universidade Federal de Goiás, Goiânia, 2017.