Banca de DEFESA: MAURO JUNIOR BORGES PACHECO

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : MAURO JUNIOR BORGES PACHECO
DATE: 22/02/2024
TIME: 09:00
LOCAL: Auditório da Pós-graduação no Prédio de Solos
TITLE:

MORPHOPHYSIOLOGICAL AND NUTRITIONAL RESPONSES IN OIL PALM SEEDLINGS UNDER PERCENTAGES OF CHEMICAL FERTILIZATION AND SILICATE FERTILIZATION

KEY WORDS:

Growth promotion, efficient use of fertilizers, silicon, microorganisms, sustainable management.

PAGES: 75
BIG AREA: Ciências Agrárias
AREA: Agronomia
SUBÁREA: Fitossanidade
SPECIALTY: Microbiologia Agrícola
SUMMARY:

Oil palm (Elaeis guineensis Jacq.) is a species of the Arecaceae family, originating in Africa, which has potential for various products and by-products, the main product being palm oil. Due to the large number of areas suitable for palm oil cultivation, Brazil has one of the greatest potential for palm oil production in the world. The quality of seedlings is one of the main factors that affect the oil palm production chain, and this quality will be reflected in production. Therefore, adequate management of the system is a determining factor, among the main practices, there is fertilization, which is one of the biggest costs for agricultural production. Therefore, in order to reduce costs and maintain a high quality standard of seedlings, practices such as silicate fertilization can be a highly impactful alternative, due to its effect on increasing resistance to biotic and abiotic stresses, as well as on development of the leaf and root system, favoring the ability of plants to absorb nutrients, improving efficiency and reducing losses in the soil-plant-atmosphere system, contributing to sustainable agricultural development. The objective of the study was to evaluate the effect of silicate fertilization and a 50% reduction in recommended fertilization on the development of oil palm seedlings based on plant growth, physiological and nutritional analyses. The experiment was conducted for 12 months, on the MEJER company farm, located in the municipality of Santarém Novo - PA. The seedlings used were of the Compacta x Nigeria variety, placed in 50 kilo bags. As a substrate, an organic compost produced by the company and a dystrophic yellow latosol was used, which was corrected and fertilized according to soil analysis, crop needs and treatment composition. The experimental design consisted of randomized blocks with a 2x2 factorial scheme, comprising 4 treatments: two levels of chemical fertilization (100% and 50%) and two levels of silicate fertilizer (30 g and 0 g of calcium and magnesium silicate / bag / changes). To evaluate the effect of treatments, biometric variables, biomass, nutritional and physiological parameters were used. Treatment means were compared using the F test with P ≤ 0.05, the treatment effect size was evaluated using Cohen's d index. In biometric, biomass, physiological and nutritional variables, significant increases were observed for silicate fertilizer in relation to the control. Therefore, it is concluded that silicate fertilizer can be inserted into the oil palm seedling production system to induce early growth with less use of chemical fertilizers, contributing to seedling production with lower production costs and more sustainable.

BANKING MEMBERS:
Presidente - 1065086 - GLEDSON LUIZ SALGADO DE CASTRO
Interna - 1551252 - GISELE BARATA DA SILVA
Externo à Instituição - GILSON SANCHEZ CHIA - MEJER
Externo à Instituição - MICHEL KEISUKE SATO - IFPA