Navegando por Autor "Salles, Rodrigo Amaro de"

Agora exibindo 1 - 3 de 3

Nutritional characteristics of conilon coffee genotypes grown in transition altitude with water management in soil
(Editora UFLA, 2021-10-27) Salles, Rodrigo Amaro de; Jordaim, Renan Baptista; Colodetti, Tafarel Victor; Rodrigues, Wagner Nunes; Amaral, José Francisco Teixeira do; Tomaz, Marcelo Antonio
The modification of water management in the Conilon coffee (Coffea canephora) crop is a possible strategy to improve nutritional management efficiency and ensure better use of the genotypes for regions of transitional altitude. The objective of this study was to evaluate the nutritional characteristics of 27 genotypes of C. canephora and submit them to two water management schemes in soil. The goal was to find evidence of higher leaf contents, exports, and nutrient recycling potential in the productive branches of various genotypes. The experiment was carried out in a randomized block design with three replications in a split-plot scheme. The treatment consisted of 27 genotypes of C. canephora and two water management schemes in soil (“Irrigated” and “Rainfed”). Nutritional content in leaves, exported by fruits, and pruned (leaves and stem of plagiotropic branches) recyclable contents were evaluated for nitrogen, phosphorus, potassium, calcium, and magnesium. Variations were observed among genotypes for all the parameters evaluated in both water management in soil. However, significant homogeneous groups were formed among the genotypes in the irrigated management. Furthermore, the genotypes showed distinct nutritional characteristics in response to water management in the soil. Genotypes 108 and 302 had higher nutritional content and were exported by fruits, regardless of soil water management.
Propagation of coffee conilon “Vitória” in conventional and alternative substrates
(Editora UFLA, 2020) Berilli, Sávio da Silva; Salles, Rodrigo Amaro de; Sales, Ramon Amaro de; Zooca, Alan Alvino Falcão; Ribeiro, Helder Rodrigues; Berilli, Ana Paula Candido Gabriel; Costa, Taiara Souza; Mendes, Tiago Pacheco; Quartezani, Waylson Zancanella
The sustainable production of inputs or products, either agricultural or industrial, has become an international concern in the last years. Thus, one of the biggest challenges today is to combine production with sustainability. Industrial waste use in agriculture is an alternative that has been gaining strength. The objective of this study was to evaluate the development, physiology and quality of Coffea canephora seedlings from the 13 genotypes (variety Vitória Incaper 8142), in conventional substrate in comparison to a substrate based on tannery sludge. A 2 x 13 factorial scheme was used in which the first factor was the two substrates (conventional substrate and substrate with tannery sludge), and the second factor was the 13 Vitória - Incaper 8142 Conilon coffee genotypes, arranged in a randomized block design with four repetitions. At 150 days after planting, the following characteristics were evaluated: leaf number, plant height, stem diameter, canopy diameter, leaf area, SPAD chlorophyll index, nitrogen balance index, total chlorophyll index, anthocyanins index and flavonoids index, dry shoot matter mass, dry root matter mass,dry total matter mass and Dickson quality index . No significant interaction was observed between the factors evaluated. The substrate containing tannery sludge provided less gain for most of the growth characteristics when compared to the conventional substrate. The tannery substrate promoted a greater production of defense metabolites in plants. As for the response pattern between the genotypes of the Vitória - Incaper 8142 variety, a high unevenness was observed in the initial development, both for their phenological and physiological characteristics, which is a reflect of the genetic variability existing between the genotypes.
Taxa de emissão foliar de genótipos de Coffea canephora em resposta à adubação nitrogenada
(Embrapa Café, 2019-10) Jordaim, Renan Baptista; Salles, Rodrigo Amaro de; Colodetti, Tafarel Victor; Rodrigues, Wagner Nunes; Martins, Lima Deleon; Verdin Filho, Abraão Carlos; Amaral, José Francisco Teixeira do; Tomaz, Marcelo Antonio
Objetivou-se, com o presente estudo, avaliar os efeitos da adubação nitrogenada na taxa de emissão foliar de genótipos de Coffea canephora Pierre ex Froehner. O experimento foi desenvolvido em delineamento inteiramente ao acaso, com quatro repetições, em esquema fatorial 6x2, sendo os fatores estudados: seis genótipos de café conilon e duas condições de disponibilização de adubação nitrogenada no solo (ausência de adubação nitrogenada e adição de nitrogênio ao nível de 0,625 g kg -1 ). A adubação com nitrogênio foi realizada com aplicação de ureia p.a., parcelada em quatro aplicações em cobertura, iniciando-se aos 15 dias após o plantio das mudas e espaçadas com intervalo de 30 dias. As plantas foram conduzidas por 150 dias, com avaliação mensal do número de folhas, obtido por contagem direta. Com base nestas avaliações, calculou-se a taxa de emissão foliar (TEF; folhas dia -1 ) a partir da variação temporal do número de folhas. Foi possível observar variabilidade de respostas para a TEF entre os diferentes genótipos de cafeeiro conilon. A adubação nitrogenada promoveu maior TEF em todos os genótipos quando comparado ao cultivo sem essa adubação. Na condição de ausência de adubação nitrogenada, o genótipo 77 foi o que apresentou a melhor resposta em TEF, enquanto o genótipo 67 se mostrou altamente sensível à deficiência de N, sessando a emissão de folhas à partir dos 75 dias de cultivo.