Banca de DEFESA: WILLDMARK VASCONCELOS SANTOS

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : WILLDMARK VASCONCELOS SANTOS
DATE: 31/07/2023
TIME: 14:00
LOCAL: meet.google.com/pdx-gsvv-xjr
TITLE:

PHYTOREMEDIATION OF SALINE SOIL WITH MAGNETIC INDUCTION AND SOIL MOISTURE LEVELS

KEY WORDS:

Salinity, Magnetic Fields, Soil Degradation, Soil Moisture.

PAGES: 40
BIG AREA: Engenharias
AREA: Engenharia Sanitária
SUMMARY:

The problem of soil salinity is one of the main threats to the sustainability of agricultural soils. Approximately 6% of the world's soils are affected by salinity, and nearly 20% of irrigated land is already salinized, causing significant economic damage. One alternative for the recovery of salt-affected soils is phytoremediation, which involves cultivating plants capable of extracting excess salts from the soil into their plant tissues. It is a low-cost technique used for this purpose. Magnetic fields can complement or enhance this extraction process by influencing plant growth under stress conditions. Studies have shown that the application of magnetic fields can increase plant growth rate, improve cellular metabolism, and enhance water absorption. In this context, the effect of magnetic fields on the growth of Caatinga species cultivated in saline soil under different soil moisture levels was evaluated. Additionally, the chemical changes in salt-degraded soil were examined to enable the use of this technique in salinized areas of the semi-arid region of Pernambuco. An experiment was conducted using polyethylene pots filled with 15 kg of soil, and two soil moisture levels were applied: 30% and 80% of field capacity. The soil was weighed daily to apply supplementary irrigation without promoting salt leaching. After irrigation, the native carcarazeiro plant was grown in the pots. The experiment consisted of a 2 x 4 factorial arrangement, with two soil moisture levels and four magnetic field induction times. After 150 days from transplanting the seedlings, the content of Na+, K+, and Cl- in the plant in response to the applied magnetic field, as well as soil variables (exchangeable and soluble Na+, Cl+, K+), electrical conductivity (EC), and exchangeable sodium percentage (ESP) were evaluated to assess the effectiveness of the treatments in reducing soil salinity. Subsequently, the data were subjected to analysis of variance (ANOVA), and means were compared using the Tukey test at a 5% probability level. Based on the results, the magnetic field shows promise in enhancing both growth and salt extraction. Magnetic induction reduced the soil EC under low soil moisture conditions. However, further studies are needed to make this technique viable and understand its effects on plant growth. It was concluded that the native carcarazeiro plant did not yield satisfactory results, indicating its intolerance to severe saline stress.

COMMITTEE MEMBERS:
Externa à Instituição - EMANUELLE MARIA DA SILVA
Interno - GENIVAL BARROS JUNIOR
Presidente - LUIZ GUILHERME MEDEIROS PESSOA