Desenvolvimento e rendimento de clones de batata na primavera e no outono

Bisognin, Dílson Antônio; Müller, Douglas Renato; Streck, Nereu Augusto; Andriolo, Jerônimo Luiz; Sausen, Darlene

doi:10.1590/s0100-204x2008000600005

Cited by 29 publications

(23 citation statements)

References 17 publications

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“…The average number of foliage for each cultivar at 45 and 65 DAP was 6.0 and 8.7, respectively. These values are below the 18 leaves recorded in same season experiments by Bisognin et al (2008), working with different potato clones, cultivated under conventional system, including mineral fertilization.…”

Section: Winter Field Cultivationcontrasting

confidence: 56%

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: Winter Field Cultivationcontrasting

confidence: 56%

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

2017

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“…These authors observed CV values ranging from 17.31% to 21.03% for the yield, number, and average mass of potato tubers. Similar CV values were reported by Bisognin et al (2008), varying between 16.19% and 25.60% for yield of tuber of different sizes of potato clones, and by Costa et al (2007), values of 22.70% and 18.30% for total yield and total number of tubers of potato clones.…”

Section: Resultssupporting

confidence: 87%

Minimum plot size to evaluate potato tuber yield traits

2017

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The proper plot size is essential to reduce experimental error and thereby maximize precision of data obtained in an experiment. The objective of this work was to estimate the minimum number of plants per plot to assess tuber yield traits of potato genotypes. Four advanced potato clones (F161-07-02, F189-06-09, F97-08-07 and F131-08-06) of the breeding program of Embrapa were evaluated. The experiment was conducted in the fall season of 2015, in Canoinhas, Santa Catarina State, Brazil. A randomized complete block design with two replications of 20-plant two-row plots was used. At 112 days after planting, plants of each plot were individually harvested and evaluated for tuber yield traits. The modified maximum curvature and the repeatability methods were used to estimate the minimum plant number to represent the genotypes in each plot. We found that 10 to 14 plants per plot are enough to guarantee an adequate precision and predict the real value of the individuals for tuber yield traits in experiments of two replications, considering an R2 of 90% for the repeatability method.

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“…No período de 60 dias após o plantio, ocorreu um total de 364mm de precipitação, período em que qualquer estresse afeta o rendimento final . Aliado a isso, o rendimento também é afetado pela menor radiação solar que, conforme BISOGNIN et al (2008), é a variável ambiental determinante das diferenças de rendimento nas condições de cultivo de primavera e outono nessa região. Também contribuiu para a baixa massa fresca por tubérculo o fato de que um terço dos tubérculos selecionados para o plantio apresentava tamanho relativamente menor, visando a manter a variabilidade.…”

Section: Resultsunclassified

“…Porém, na época 3, a relação é completamente distinta, apenas maior diâmetro e menor diâmetro foram significativos com todos os caracteres dos tubérculos colhidos (Tabela 2). Essas diferenças reafirmam os resultados de muitos trabalhos (LOVATO, 1993;MENEZES et al, 1999;LAMBERT, 2004;ANDREU, 2005;BISOGNIN et al, 2008), mostrando que fatores ambientais afetam não só a produção, mas também a aparência e a qualidade de tubérculos.…”

Section: Resultsunclassified