Biblioteca do Café
URI permanente desta comunidadehttps://thoth.dti.ufv.br/handle/123456789/1
Navegar
3 resultados
Resultados da Pesquisa
Item Desempenho agronômico de cafés arábica resistentes à ferrugem no cerrado central(Embrapa Café, 2019-10) Veiga, Adriano Delly; Guerra, Antônio Fernando; Bartholo, Gabriel Ferreira; Rocha, Omar Cruz; Rodrigues, Gustavo Costa; Silva, Thiago Paulo daA indicação de cultivares resistentes à ferrugem para diferentes ambientes e sistemas de cultivo, visa aumento de produtividades e redução de custos de produção. Com objetivo de avaliar desempenho agronômico de novas cultivares e progênies de café arábica com resistência à ferrugem, nas condições de Cerrado do Planalto Central do Brasil, foi instalado em 2008 um ensaio na área experimental da Embrapa Hortaliças. Os tratamentos foram 23 cultivares e quatro progênies resistentes à ferrugem além de três cultivares suscetíveis, utilizadas como controle. O experimento foi conduzido com o delineamento em blocos ao acaso com quatro repetições e parcelas de 10 plantas. As características avaliadas foram: altura de plantas, diâmetro de caule, projeção da copa, número de pares de ramos plagiotrópicos e produtividade de grãos. As cultivares Catucaí 2SL, Sacramento MG e Araponga MG destacaram-se em crescimento vegetativo. As cultivares com maiores produtividades médias, acima de 60 sc.ha -1 , apresentando maior adaptabilidade às condições ambientais são IPR 103, Obatã Vermelho 1669-20, Palma II, Sabiá 398 e Acauã.Item Arabica coffee cultivars in different water regimes in the central cerrado region(Editora UFLA, 2019-07) Veiga, Adriano Delly; Rodrigues, Gustavo Costa; Rocha, Omar Cruz; Bartholo, Gabriel Ferreira; Guerra, Antônio Fernando; Silva, Thiago Paulo daPhenotypic characterization of coffee cultivars under an irrigation system, as well as adaptability to controlled water stress, aiming at flowering uniformity, high yield and grain quality, plays an important role in coffee production in the cerrado areas. A field trial was carried out aiming to evaluate the agronomic performance of arabica coffee cultivars under different water regimes, using center pivot irrigation: irrigation throughout the year (WR1); suspended at the end of June for 40 days until leaf water potential reached -1.5 MPa (WR2); suspended at the end of June for 70 days until leaf water potential reached -2.3 MPa (WR3); suspended at the end of June for 100 days until leaf water potential reached -3.4 MPa (WR4); and a non-irrigated regime (WR5). The following traits were analyzed: plant height, stem diameter, canopy projection, number of plagiotropic branches, coffee grain yield, percentage of fruit in the cherry stage, and sieve retention percentages. Higher yield, plant growth, and percentage of fruit in the cherry stage are observed in the water regime with seventy days of controlled water stress (WR3). The Obatã IAC 1669-20 cultivar exhibits high yield and plant growth values in an irrigated system, and Catuaí Amarelo IAC 86 stands out in the non-irrigated system. For these genotypes, the coffee grain yield is most highly correlated with number of reproductive branches.Item Agronomic performance and adaptability of arabic coffee resistant to leaf rust in the central brasilian savanna(Editora UFLA, 2018-01) Veiga, Adriano Delly; Rocha, Omar Cruz; Guerra, Antônio Fernando; Bartholo, Gabriel Ferreira; Rodrigues, Gustavo Costa; Pereira, Welington; Silva, Thiago Paulo da; Silva, Evandro Ribeiro daBreeding programs and later indication of rust resistant cultivars for different environments and crops systems, in the concept of diseases integrated control, reach out for productivity raising and reduced production costs. The aim of this work was to evaluate the agronomic performance and adaptability of new Coffea arabica cultivars and progenies resistant to leaf rust in Central Brazilian Savanna. The experiment has been conducted since 2008 in an experimental area of Embrapa Hortaliças. Twenty three resistant cultivars, four progenies and three susceptible cultivars as controls, were assessed in a complete randomized block design with four replicates. The following traits were analyzed: plant height, stem diameter, canopy projection, number of plagiotropic branches, yield, grains percentage retained in sieves above 17, grain ripening and diseases resistance. Catucaí 2SL, Sacramento and Araponga stood out in vegetative growth. The highest yields are observed for IPR 103, Obatã 1669-20, Palma II, Sabiá 398 and Acauã, with values higher than 60 sacks per hectare. Among all these cultivars is observed high resistance to rust leaf and greater susceptibility to brown eye spot in the cultivar Acauã, for the place and period of evaluation.