Banca de DEFESA: CARLOS ANTÔNIO DOS SANTOS

Uma banca de DEFESA de DOUTORADO foi cadastrada pelo programa.
STUDENT : CARLOS ANTÔNIO DOS SANTOS
DATE: 09/11/2020
TIME: 09:00
LOCAL: Sala 01 PPGF
TITLE:

Brassica production in the mountainous region of Rio de Janeiro: Relationship between soil attributes, management practices, clubroot, and metal contamination.

KEY WORDS:

Plasmodiophora brassicae, soil factors, poultry litter, slag.

PAGES: 1
BIG AREA: Ciências Agrárias
AREA: Agronomia
SUBÁREA: Fitotecnia
SPECIALTY: Manejo e Tratos Culturais
SUMMARY:

The vegetables of the Brassicaceae family, demanding in fertility, handling and cold climate, have great nutritional and market value. In the State of Rio de Janeiro, its production is concentrated in the mountainous region, on family properties under intensive management, with a typical configuration of mountain agriculture in a tropical region and with recurrent reports of losses and environmental impacts. Within this context, the present work was developed with the following objectives: 1) Investigate the main aspects, management practices and problems related to the production of kale in a representative region for this crop; 2) to propose and test strategies for soil management, phytotechnics and control of clubroot in the culture of broccoli; 3) evaluate the impacts of management practices and inputs on the quality of vegetables and contamination by heavy metals. Initially, samples of soil and kale plants were collected in areas of family production in the region of Petrópolis, RJ, followed by the evaluation of soil attributes, biomass production and intensity of clubroot (Chapter I). There were failures in management that may be contributing to the generalized occurrence of the disease, such as the sequential cultivation of host species and the failure to conduct soil and liming analysis. The disease was more severe in more acidic soils, with high content of Al in soils and roots, and greater capacity for water accumulation. In Chapter II, management strategies were evaluated to increase the yield of the broccoli culture and reduce the losses caused by the clubroot. In the first trial, the incorporation of four types of cover plants (green manure), associated with the use of broccoli seedlings of different sizes, was evaluated. In the second trial, the use of corrective, limestone and steel slag associated with the application of poultry litter, fresh or composted for 45 days, was evaluated. The incorporation of sunn hemp and coriander biomass, and the use of larger seedlings (cell of 35 mL and age of 28 days) and (cell of 50 mL and age of 32 days), resulted in less intensity of the disease, and greater development of plants and productivity. The application of poultry litter increased the intensity of the disease but did not affect the production of broccoli. The application of steel slag did not differ from limestone in terms of acidity correction and plant development. In Chapter III, the contamination of broccoli plants by heavy metals was analyzed due to the use of slag and poultry litter. The levels, translocation and accumulation of metals, and risks to human health associated with the consumption of the produced inflorescences were determined. The metals Pb and Cd were the ones that most collaborate for the non-carcinogenic health risks. In the inflorescences, 60.37 to 66.13% of all the Pb absorbed was accumulated by using, simultaneously, steel slag and fresh or composted poultry litter. Based on the calculated indices, it was concluded that the consumption of inflorescences produced with the combined use of these inputs can result in health risks.

BANKING MEMBERS:
Presidente - 1213072 - MARGARIDA GORETE FERREIRA DO CARMO
Interno - 785.371.857-87 - JOSÉ GUILHERME MARINHO GUERRA - EMBRAPA
Externa à Instituição - FABIANA SOARES DOS SANTOS - UFF
Externo à Instituição - MARCO ANTONIO DE ALMEIDA LEAL - EMBRAPA
Externo à Instituição - SILVALDO FELIPE DA SILVEIRA - UENF