Rendimento de tubérculos de três cultivares de batata sob condições de estiagem

Silva, Giovani Olegário da; Stoker, Gilberto; Ponijaleki, Rubens; Pereira, A. da S.

doi:10.1590/s0102-05362013000200007

Cited by 8 publications

(10 citation statements)

References 12 publications

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“…Cultivar BRS Clara was the most tolerant as none disease symptoms were recorded until the last evaluation. These results sustain Pereira et al (2013) whose records for late blight concluded that BRS Clara possess foliar resistance against late blight. On the other hand, cultivar Agata showed a high susceptibility to late blight, as a high AUDPC record was recorded on this cultivar: at the 55 DAP, plants of cultivar Agata showed no effective photosynthetic leaf area due to severe disease incidence.…”

Section: Summer Field Cultivationsupporting

confidence: 82%

“…The other cultivars showed similar results, with an average of 9.0 tubers per plant. Silva et al (2013) observed similar tuber number for cultivars BRS Ana and BRS Clara: 8.37 and 10.7 per plant, respectively; but a higher total tuber number for cultivar Agata (13.9 tubers/plant) in a experiment under conventional cultivation system, using synthetic fertilizers and agrochemical pest management.…”

Section: Summer Field Cultivationmentioning

confidence: 65%

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Seed-potato production through sprouts and field multiplication and cultivar performance in organic system

2017

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Organic farming requires the production or use of certified seeds from the same cultivation system and, the information of potato cultivars adapted to organic production system is important. The objective of this work was to study the feasibility of utilizing sprouts of different potato cultivars, seed multiplication and yield potential in field conditions without using agrochemicals. Three experiments were conducted: the first experiment using sprouts as seed under protected cultivation in Guarapuava, Paraná State, Brazil, from November 2011 to February 2012; the second experiment was field conducted in Candói, Paraná State, from May to September 2012 and the third experiment was field conducted in Guarapuava, Paraná State, from February to May 2013. The experimental design was a randomized block design with 3 replications in all 3 experiments. In the 2 first experiments the following cultivars were evaluated: BRS Ana, BRS Clara, BRS Eliza, Crystal and Catucha, and in the last experiment Agata, Bintje, Baronesa and BRSIPR Bel were included. The traits analyzed were length of main stem, number of stems, number of leaves, fresh weight and number of tubers, percentage of infection by viruses and in the second experiment the incidence of late blight on leaves. In the third experiment, leaf area index (LAI), tuber, leaves and stem dry weights and late blight severity were also analyzed. In the first experiment, the cultivars showed differences in plant height and minituber production, the highest value was observed in cultivars BRS Clara and BRS Ana for plant height and cultivar BRS Clara for minituber production. In the second experiment, there was difference only in plant height, the tallest cultivars were BRS Ana and BRS Clara . There was low spread of viruses and, it did not directly reflect in tuber yield. In the third experiment the cultivars with lower disease severity were those recommended to organic farming, especially BRS Clara and Catucha; this second cultivar had the higher LAI and tuber yield, as well as resistance to late blight, factors that might have contributed to the recorded highest total tuber yield (13.8 t/ha).

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Section: Summer Field Cultivationsupporting

confidence: 82%

Section: Summer Field Cultivationmentioning

confidence: 65%

Seed-potato production through sprouts and field multiplication and cultivar performance in organic system

2017

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“…The cultivar of potato most planted by the producers is cv. Agate, which is characterized by desirable characteristics due to early tuberization, good tuber appearance and productivity (PINELI, 2006;SILVA, 2013).…”

Section: Introductionmentioning

confidence: 99%

Performance of organomineral fertilizer in winter and rainy potato crop

Cardoso¹,

Lana²,

Soares³

et al. 2017

Biosci. J.

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ABSTRACT:The Agata potato is the most important economic sources of food in Brazil. However, fertilization for this crop has been carried out incorrectly, increasing production costs. Thus, the use of organomineral fertilizer reduces the amount of nutrient applied, facilitates the release of nutrients more slowly and brings improvement in the chemical, physical and biological attributes of the soil. The objective of this work was to evaluate the efficiency of organomineral fertilizers rates and comparate with mineral source on the potato crop in differents seasons. The experimental design was in randomized blocks, with five rates and four replications in the winter season. In the harvest of the rainy season the experiment consisted of 6 rates and four replications. Treatments were 1629.0; 2444.0; 3258.0; 4073.0; 4887.0 kg ha -1 of the organomineral fertilizer which equals 40; 60; 80; 100 and 120% of the rate in relation to the mineral fertilizer of 2800 kg ha -1 of formulation 03-32-06. There weren`t significant difference of the organomineral fertilizer in relation to the mineral in the total, commercial and special class of tubers in the winter crop. In the harvest of rainy crop, the average total productivity of potato tubers at all rates of organomineral fertilizer was 29 t ha -1 , which represents 22% higher than mineral fertilizer. The organomineral fertilizer presented agronomic efficiency for potato cultivation and could replace NPK mineral sources. The 4887.0 kg ha -1 organomineral rate generated higher total yield, commercial and special class of tubers.

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“…O fotoperíodo é longo e a pressão de seleção para fatores bióticos e abióticos que afetam a cultura lá é baixa, diferente do Brasil, resultando em cultivares que, quando plantados em condições subtropicais e tropicais, apresentam períodos vegetativos (Rodrigues, 2006) e produtividades menores. Para conseguir maior produtividade é necessário o uso intensivo de fertilizantes, o que pode levar a menor sustentabilidade da cultura (Silva et al, 2013). Desta forma, a obtenção de cultivares adaptados às condições de cultivo nas diversas regiões produtoras brasileiras e com resistência às principais doenças é a alternativa viável para tornar a cultura produtiva e rentável ao agricultor (Gadum et al, 2003).…”

Section: Introductionunclassified

“…Presume-se que cultivares desenvolvidos para condições de solos ácidos, como ocorre no Brasil, apresentem raízes mais profundas, sendo mais tolerantes à seca (Silva et al, 2013) e mais eficientes no aproveitamento dos nutrientes do solo.…”

Section: Introductionunclassified

Resposta de cultivares de batata a níveis crescentes de NPK

et al. 2017

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RESUMO A cultura da batata apresenta capacidade de resposta à adubação mais elevada que a de outras culturas. No entanto o uso exagerado de fertilizantes pode resultar no aumento do custo de produção e promover o desequilíbrio nutricional da planta, além da contaminação do ambiente. Desta forma, objetivou-se avaliar a resposta de cultivares de batata melhorados e introduzidos à aplicação de doses crescentes de NPK quanto à produtividade, ao peso específico e à coloração de fritura. O experimento foi realizado em Latossolo Vermelho Distrófico, em Canoinhas, SC, na primavera de 2014. Os tratamentos constaram de quatro doses de fertilizante NPK 04-14-08: 0, 3, 6 e 9 t ha-1 aplicadas no plantio. O delineamento experimental foi em blocos casualizados, em arranjo de parcelas subdivididas, com três repetições, sendo as parcelas constituídas pelos cultivares e as subparcelas pelas doses de NPK. Após 120 dias do plantio, as variáveis foram avaliadas e analisadas estatisticamente (ANOVA e regressão polinomial). As doses crescentes de adubo NPK resultaram no aumento do número e do tamanho dos tubérculos, porém sem alteração do peso específico. Houve melhoria da coloração de fritura para todas cultivares, exceto para BRS Ana, com coloração mais clara. Os cultivares melhorados para as condições locais, BRS Ana e BRS F63 Camila, foram mais produtivos do que os cultivares introduzidos, Agata e Asterix, tanto com doses de adubo maiores, quanto menores, tendo sido o cultivar BRS F63 Camila o mais responsivo ao aumento da adubação. Dependendo do cultivar, a máxima viabilidade técnica estimada atingiu o valor máximo testado de 9,00 t ha-1 de NPK na formulação 04-14-08, como no caso de BRS F63 Camila, porém a máxima viabilidade econômica variou de 5,77 a 9,00 t ha-1.

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Rendimento de tubérculos de três cultivares de batata sob condições de estiagem

Cited by 8 publications

References 12 publications

Seed-potato production through sprouts and field multiplication and cultivar performance in organic system

Seed-potato production through sprouts and field multiplication and cultivar performance in organic system

Performance of organomineral fertilizer in winter and rainy potato crop

Resposta de cultivares de batata a níveis crescentes de NPK

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