Banca de DEFESA: DOUGLATH ALVES CORRÊA FERNANDES

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
DISCENTE : DOUGLATH ALVES CORRÊA FERNANDES
DATA : 27/02/2019
HORA: 09:00
LOCAL: Anfiteatro PPGEA
TÍTULO:

PRODUÇÃO DE MUDAS DE IPÊ BRANCO (Tabebuia roseoalba) COM DIFERENTES SUBSTRATOS E CASCALHO DE PERFURAÇÃO DE POÇOS DE PETRÓLEO SUBMETIDAS A ESTRESSE HÍDRICO.

PALAVRAS-CHAVES:

Residue, stress, water, biosolids.

PÁGINAS: 92
GRANDE ÁREA: Ciências Agrárias
ÁREA: Agronomia
SUBÁREA: Ciência do Solo
RESUMO:

In order to obtain success and good results in the establishment of forest plantations and reforestation, it is of paramount importance, among other factors, the choice of substrate, since it exerts a direct effect on the quality of the seedlings and consequently greater survival in the field. In planting one of the problems that causes high mortality of seedlings implanted is the lack of water (dry), being interesting to adapt the use of technologies and concepts already known in order to reduce the incidence of mortality of seedlings in the initial phase of adaptation. The objective of this work was to evaluate the quality of Tabebuia roseoalba seedlings, developed in a substrate containing drilling gravel from oil wells (gravel) and organic matter sources, submitted to water stress. The work was done in a greenhouse of the Department of soils of UFRRJ. The seedlings were produced by indirect sowing in washed sand in the forest nursery of CEDAE - Alegria Station. 30 days after emergence, the seedlings were transplanted to the plastic pots with a capacity of 1.7 liters. The substrate was prepared from the soil mixture (PLANOSSOLO Háplico, with medium texture), the equivalent of 20 t ha-1 of gravel, and doses of biosolids (sewage sludge) and vermicompost. The experimental design was a randomized complete block (DBC), consisting of 6 treatments: 100% soil (Soil), 100% soil + gravel (SC), 25% vermicompost / 75% soil + gravel (25VC), 50% of vermicompost / 50% soil + gravel (50VC), 25% biosolid / 75% soil + gravel (25BS) and 50% biosolid / 50% soil + gravel (50BS) with 3 replicates. The experiment was carried out in 3 phases with 3 collections, in the first phase all seedlings were irrigated daily maintaining the humidity near 70% CC during 110 days, in the second phase half of the seedlings were submitted to water stress by the suspension of irrigation and another In the third phase, all seedlings were irrigated daily, keeping humidity at 70% CC for 25 days to rehydrate the seedlings. The plants were collected and evaluated for growth in height (H), gain in diameter (D), leaf number (NF), leaf area (AF), shoot dry mass (MSPA), stem dry mass (H), (H / DC), shoot dry mass / mass (H / MSPA), dry mass of the aerial part / mass root dry matter (MSPA / MSR) and the Dickson quality index (IQD). The comparison of means was performed by the T test at 5% significance and all procedures were performed in R software. What the drill gravel at the dose used promoted the increase of Na +, pH and EC contents of soil and substrates, impairing the development of Tabebuia roseoalba seedlings. However, biosolids proved to be a good substrate component in the production of white Ipê (Tabebuia roseoalba) seedlings. The treatment with 25% biosolids 75% soil + gravel promoted a satisfactory development of white Ipê seedlings, presenting the best result in the majority of the evaluated parameters.

MEMBROS DA BANCA:
Presidente - 2213075 - EVERALDO ZONTA
Externo ao Programa - 2299335 - PAULO SERGIO DOS SANTOS LELES
Externo à Instituição - ALAN HENRIQUE MARQUES DE ABREU