Banca de DEFESA: MARIANA CECÍLIA MELO

Uma banca de DEFESA de DOUTORADO foi cadastrada pelo programa.
DISCENTE: MARIANA CECÍLIA MELO
DATA: 27/04/2023
HORA: 14:00
LOCAL: Google Meet
TÍTULO:

CHARACTERIZATION OF THE THERMAL ENVIRONMENT IN A COMPOST BADDED PACK BARN WITH PHOTOVOLTAIC PLATES AND NH₃ VOLATILIZATION UNDER THE APPLICATION OF REMINERALIZERS IN DIFFERENT BEDS

PALAVRAS-CHAVES:

Dairy cattle housing. Geostatistical modeling. Composting. Silicate rock powders. Photovoltaic plates

PÁGINAS: 125
GRANDE ÁREA: Ciências Agrárias
ÁREA: Engenharia Agrícola
SUBÁREA: Construções Rurais e Ambiência
RESUMO:

The advancement of dairy farming is subject to the search for new techniques and strategies that aim to improve the productivity, efficiency and sustainability of this sector through the identification and correction of gaps and bottlenecks. In this sense, this work aimed to characterize the spatial variability of the thermal environment inside a Compost Badded pack (CB) shed, which in one of the roof slopes has photovoltaic panels along its entire length to ensure comfort and well-being. animal and verify if the addition of remineralizers under compost beds are able to minimize the volatilization of ammonia (NH₃) from the compost and, still, be a potential source of nutrients such as potassium. The characterization of the thermal environment was carried out in a CB shed located in the municipality of Rio Paranaíba-Minas Gerais in the spring, summer, autumn and winter seasons of 2021. They were determined at heights of 1,0, 2,0, 3,0 and 4,0 m the indices of temperature and humidity of black globe (ITGU) in the longitudinal profile and radiant thermal load (CTR) in 3 vertical positions through the collection of 60 points uniformly distributed in the bedding area of the shed. The results were submitted to geostatistical analysis to verify the spatial variability of the data through semivariograms and kriging maps. The modeling proved to be efficient to represent the microclimate of the shed. The maps of the ITGU and CTR indices estimated by ordinary kriging allowed the visualization of specific points of discomfort inside the installation. However, it was not possible to show changes in the microclimate due to the arrangement of photovoltaic panels on the roof. The research on the addition of remineralizers on compost beds was carried out in the laboratory in a completely randomized design with 10 treatments structured in a factorial scheme (2 x 4 +2), with two types of organic material used as bedding (coffee husks and fine shavings of pine), four remineralizers (verdigris, phonolite, gypsum and control) and two additional treatments with microbial inoculants from native vegetation, with four replications, totaling 40 experimental units. The composting process yield, compost moisture, C/N ratio, NH₃ volatilization and nitrogen (N), organic carbon, total potassium (K_total) and available potassium (K_disp) contents were evaluated. Data were subjected to analysis of variance and means were compared by SNK and Holm-Bonferroni test at 5% probability of error α. It was possible to demonstrate the great N conservation capacity after the addition of gypsum, phonolite and glauconite in the material to be composted, especially gypsum, which, in relation to the control compounds, was able to maintain a N content of 1,5 and 1,7 times higher in coffee husks and wood shavings, respectively. Furthermore, an increase in K_totaland K_disp contents can be observed in both substrates added with glauconite and phonolite (except shavings) and greater decomposition and availability of K_total in coffee husks in the presence of microbial inoculants.

MEMBROS DA BANCA:
Presidente - ALESSANDRO TORRES CAMPOS (Membro)
Externo à Instituição - ANDRÉ MUNDSTOCK XAVIER DE CARVALHO - UFV (Membro)
Interno - GABRIEL ARAUJO E SILVA FERRAZ (Membro)
Externo ao Programa - LEONARDO SCHIASSI - DEA/EENG (Suplente)
Externo ao Programa - PATRICIA FERREIRA PONCIANO FERRAZ - DEG/EENG (Membro)
Interno - TADAYUKI YANAGI JUNIOR (Membro)
Externo à Instituição - THAÍSA FERNANDA OLIVEIRA - UFV (Suplente)