Banca de DEFESA: ELOISO JUNIO CORREA CAMPOS

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : ELOISO JUNIO CORREA CAMPOS
DATE: 29/07/2022
TIME: 13:30
LOCAL: Sala virtual através do link https://meet.google.com/izy-iiaa-fqb
TITLE:

EVALUATION OF THE USE OF SILICON IN CORRECTION OF SOIL ACIDITY AND IN THE PRODUCTIVITY OF CORN AND BEANS CROPS

KEY WORDS:

Zea mays L.; Phaseolus vulgaris L.; Soil fertility; Steel slag; Grain production

PAGES: 35
BIG AREA: Ciências Agrárias
AREA: Agronomia
SUBÁREA: Ciência do Solo
SPECIALTY: Fertilidade do Solo e Adubação
SUMMARY:

The growing demand for food production, combined with biotechnological development, made Brazil one of the largest consumers of fertilizers in the world, as a consequence, the input from the domestic market was not enough to supply the demand, causing the country to become dependent on imports, increasing the cost of production. Brazil stands out not only in agriculture, but also in the production of pig iron, with the city of Sete Lagoas - MG being one of the most important in the steel sector. Slag is a by-product of pig iron production that presents higth content of silicates that, in reaction with hydrogen protons available in the soil, reacts to form monosilicide acid, uptake form for plant. Silicon (Si) is considered a beneficial element and has been ignored for many years in agriculture. Research has shown improvement in plant nutritional quality and beneficial effects in correcting soil acidity. The tailings, produced in large quantities, can be used in agriculture, mainly for crops considered to accumulate Si, such as corn. On the other hand, beans are considered a non-accumulating plant, however, different sources can make Si available in greater or lesser amounts. Thus, the objective of this work was to evaluate the effect of using steel slag as a source of silicate in the correction of soil acidity and its effect on growth and productivity variables in corn and bean crops. As beans are considered a non-accumulating plant, it was decided that they should be cultivated after planting corn so that the slag had a longer reaction period in the soil, 8 months. In addition, the plant could take advantage of the phytoliths released by the straw from the previous crop that was deposited in the area. The work was carried out in randomized blocks in the experimental field Universidade Federal de São João del-Rei – Sete Lagoas campus, located in the central region of Minas Gerais, consisting of 6 treatments (slag doses) and 4 replications. The slag was ground, passed through a 2mm sieve and distributed in doses equivalent to 0 (control), 50, 100, 200, 400 and 800 kg ha-1 of SiO2. The variables analyzed were those related to pH correction and plant productivity. None of the analyzed variables presented a significant result, probably due to the low solubilization of the silicate source used. The slag doses did not correct the soil acidity, did not influence the productivity and did not increase the Si content in the plant or in the soil. The corn plant showed potential for absorption, translocation and silicon polymerization, unlike common bean, which was not possible to observe absorption. Soil pH did not change due to slag non-reactivity. The slag used under the conditions of the experiment does not present efficient solubilization.

BANKING MEMBERS:
Interna - 3125822 - ALINE DE ALMEIDA VASCONCELOS
Presidente - 2253801 - AMILTON FERREIRA DA SILVA
Externo à Instituição - RAFAEL DA SILVA TEIXEIRA