Banca de DEFESA: JULLYA ROSA AFFONSO SANTOS DOS SANTOS

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : JULLYA ROSA AFFONSO SANTOS DOS SANTOS
DATE: 27/08/2020
TIME: 08:30
LOCAL: Na residência de cada membro por videoconferência
TITLE:

BORON AS A MITIGATOR OF THE TOXIC EFFECT OF ALUMINUM ON THE DEVELOPMENT OF OIL PALM SEEDLINGS.

KEY WORDS:

Aluminum; Elaeis guineensis Jacq .; Boron Levels; Toxicity

PAGES: 45
BIG AREA: Ciências Agrárias
AREA: Agronomia
SUBÁREA: Ciência do Solo
SPECIALTY: Fertilidade do Solo e Adubação
SUMMARY:

The oil palm is the most important oilseed worldwide, and Al can be an abiotic factor limiting its productivity and quality, causing a decrease in the growth and development of these plants, B in turn, is a micronutrient that participates in the synthesis of the wall and cellular elongation, in the transport of carbohydrates, avoids the paralysis of the root growth, presenting great importance in the development of the roots, growth that can help to mitigate the toxic effects of aluminum, directly affecting its production and yield. In this context, the objective of the work was to study the effect of B, enabling greater growth and development from the evaluations of morphological processes, gas exchange, chlorophyll and carotenoid content in oil palm seedlings, grown under different aluminum saturations. The experiment was carried out in a greenhouse, using as substrate samples of a Yellow Latosol with a 0-20 cm layer, in a completely randomized design, 3x5 factorial arrangement, with three levels of Al saturation (m%): 50, 60 and 70%, applied in the form of aluminum chloride (AlCl3) and five doses of B: 0, 3, 6, 10.15 mg // dm³ soil in the form of H3BO3, the samples were grown in the period of 8 months. The results showed that B promoted better results when compared to treatments with the absence of micronutrient, in addition to mitigating the effect of toxic aluminum, showing greater efficiency by using water in oil palm seedlings, for the variables of MSPA, MSR and MST the amount of B to be applied for maximum technical efficiency is 0.40 mg / dm³; 2.71 mg / dm³ and 0.04 mg / dm³ of B for 70% Al saturation. Therefore, it is concluded that the biometric and gas exchange variables for oil palm seedlings were significantly influenced by saturation of Al in the soil, and B was able to mitigate the toxic effect of Al in oil palm seedlings when submitted to doses of 3 and 6 mg / dm³, according to the variable EisUA, being an essential micronutrient in the growth and development of plants.

BANKING MEMBERS:
Presidente - 1228204 - MARIO LOPES DA SILVA JUNIOR
Externa ao Programa - 3064943 - BRUNA SAYURI FUJIYAMA
Externo ao Programa - 3150516 - ISMAEL DE JESUS MATOS VIEGAS
Externo à Instituição - GILSON SANCHEZ CHIA - AGROPALMA