Banca de QUALIFICAÇÃO: LAYSE BARRETO DE ALMEIDA

Uma banca de QUALIFICAÇÃO de MESTRADO foi cadastrada pelo programa.
STUDENT : LAYSE BARRETO DE ALMEIDA
DATE: 30/09/2022
TIME: 10:00
LOCAL: Por videoconferência
TITLE:

Morphophysiological and nutritional quality of açaizeiro seedlings (Euterpe oleraceae Mart.) in different proportions of organic waste compost.

KEY WORDS:

Açaí tree. Seedling production. Organic waste

PAGES: 82
BIG AREA: Ciências Agrárias
AREA: Agronomia
SUBÁREA: Fitotecnia
SPECIALTY: Produção de Mudas
SUMMARY:

The açaizeiro is a native palm tree in the Amazon with great economic importance for the regional fruit industry, mainly for the state of Pará, the largest national producer, with açaí juice being an iconic product of this state, representing the main product extracted from the palm. Due to the economic potential and expansion of the açaí market, there is a need to produce quality seedlings for the implantation of organic crops in the Amazon, which is strictly related to the use of substrate. The use of organic compounds from residues in the formulation of substrates is a practice adopted by many farmers and presents itself as an alternative from an economic and environmental point of view. The objective of the study was to evaluate the morphophysiological and nutritional quality of açaí seedlings in different proportions of organic waste compost. The experiment was carried out in a nursery at the Universidade Federal Rural da Amazônia, Campus Belém/PA. The organic compost used to compose the substrates came from the organic community Campo Limpo, municipality of Santo Antônio do Tauá, resulting from the composting of chicken manure and residues from açaí (Euterpe oleraceae Mart.), andiroba (Carapa guianensis Aubl. ), passion fruit (Passiflora edulis Sims) and priprioca (Cyperus articulatus L.). The experiment consisted of a randomized block design, with treatments arranged in a 5x2+1 factorial arrangement, with factor 1 (five proportions of organic compost - 0%, 20%, 40%, 60% and 80%) and factor 2 (with and without the use of liming) and the treatment containing 100% of compost. Each treatment had 5 replications and 3 seedlings. At 6, 8 and 10 months after transplanting, biometric evaluations of the seedlings were performed (plant height, stem diameter, number of leaves, leaf area, root length, root volume, shoot dry mass, dry mass root, robustness index and Dickson quality index) and leaf tissue nutritional content (N, P, K, Ca, Mg, S, B, Mn, Fe and Zn), while at 6 and 10 months they were evaluated the physiological parameters (chlorophyll index, net CO2 assimilation, stomatal conductance to water vapor and transpiration rate). The results reveal that the use of these organic residues in the formulation of substrates promoted an increase in biometric, physiological and nutritional parameters, resulting in quality seedlings suitable for definitive planting. In this way, these substrates produced from these residues constitute a promising alternative in relation to commercial substrates, resulting in quality seedlings, in addition to contributing to the reduction of the purchase of fertilizers, minimizing the costs with commercial substrates, reducing the environmental impacts caused by the disposal of these materials, in addition to providing a noble and rational end to these residues.

BANKING MEMBERS:
Externa ao Programa - 388335 - ANA REGINA DA ROCHA ARAUJO
Presidente - 2494920 - ANTONIA BENEDITA DA SILVA BRONZE
Externa ao Programa - 1740947 - DENMORA GOMES DE ARAUJO
Externo à Instituição - RICARDO AUGUSTO MARTINS CORDEIRO - IFPA