Reguladores vegetais na batata cv. Monalisa, após a tuberização

Tavares, S. C. C. de H.; Lucchesi, Antonio A.

doi:10.1590/s0103-90161999000400027

Cited by 4 publications

(3 citation statements)

References 3 publications

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“…As to MC, it was evident that it acted as a growth stimulator, indicating a new line of research to be developed with modern-type cultivars, where this regulator could increase grain yield without causing significant effect in lodging, since these plants have low heights. Nobrega et al (1999) and Tavares & Lucchesi (1999) reported that the use of MC increased crop yields of cotton and potato. Therefore, even though the physiological effect of mepiquat chloride in determining higher yields is not yet explained, our results were not entirely unexpected.…”

Section: Resultsmentioning

confidence: 99%

Gas exchange rates, plant height, yield components, and productivity of upland rice as affected by plant regulators

Alvarez

Crusciol

Nascente

et al. 2012

Pesq. agropec. bras.

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The objective of this work was to evaluate gas exchange rates, plant height, yield components, and productivity of upland rice, as affected by type and application time of plant growth regulators. A randomized block design, in a 4x2 factorial arrangement, with four replicates was used. Treatments consisted of three growth regulators (mepiquat chloride, trinexapac-ethyl, and paclobutrazol), besides a control treatment applied at two different phenological stages: early tillering or panicle primordial differentiation. The experiment was performed under sprinkler-irrigated field conditions. Net CO2 assimilation, stomatal conductance, plant transpiration, and water-use efficiency were measured four times in Primavera upland rice cultivar, between booting and milky grain phenophases. Gas exchange rates were neither influenced by growth regulators nor by application time. There was, however, interaction between these factors on the other variables. Application of trinexapac-ethyl at both tillering and differentiation stages reduced plant height and negatively affected yield components and rice productivity. However, paclobutrazol and mepiquat chloride applied at tillering, reduced plant height without affecting rice yield. Mepiquat chloride acted as a growth stimulator when applied at the differentiation stage, and significantly increased plant height, panicle number, and grain yield of upland rice.

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Section: Resultsmentioning

confidence: 99%

Gas exchange rates, plant height, yield components, and productivity of upland rice as affected by plant regulators

Alvarez

Crusciol

Nascente

et al. 2012

Pesq. agropec. bras.

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“…Sabe-se que a fase de formação de tubérculos em batata ocorre normalmente até 40 dias após o plantio (Tavares, 2002). Em nenhuma das épocas de dessecação houve diferença significativa entre 'CL02-05' e 'Agata' quanto ao número de tubérculos comerciais.…”

Section: Resultsunclassified

Rendimento de tubérculos de um clone de batata em função da época de dessecação

et al. 2015

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A definição da correta época de dessecação, buscando o equilíbrio entre precocidade e rendimento de tubérculos é importante na produção de batata para comercialização in natura. O objetivo com o presente trabalho foi verificar a precocidade de produção e o potencial produtivo do clone de batata CL02-05. O experimento foi realizado no campo experimental da Embrapa Produtos e Mercado, Canoinhas-SC, no cultivo de primavera ("das águas"). Os tratamentos foram compostos por quatro épocas de dessecação (80, 90, 100 e 110 dias após o plantio) aplicadas no clone CL02-05 e na cultivar Agata (controle). O delineamento experimental foi em blocos casualizados com três repetições. A parcela experimental foi composta por quatro fileiras de 10 plantas. Dez dias após as aplicações do dessecante paraquat (Gramoxone, 2,5 L/ha), as plantas das parcelas foram colhidas e os tubérculos avaliados para caracteres componentes do rendimento. Os dados foram submetidos à análise de variância e de regressão polinomial. Verificou-se que a massa de tubérculos comerciais do clone CL02-05 dessecado aos 90 dias após o plantio (DAP) (20,21 t/ha) foi maior que da 'Agata' dessecada na mesma época (17,84 t/ha) e similar à 'Agata' dessecada aos 100 DAP (20,57 t/ha). Nas dessecações de 100 e 110 DAP a massa comercial do clone CL02-05 (28,32 e 41,25 t/ha) também foi significativamente maior que da 'Agata' (20,57 e 21,61 t/ha). Os resultados sugerem que, comparada à 'Agata' que tem massa de tubérculos comerciais otimizada próximo aos 100 DAP, o clone CL02-05 atinge nível similar já aos 90 DAP, oferecendo maior precocidade de produção. O retardamento da dessecação, no entanto, possibilita incrementos significativos na produção comercial até, pelo menos, os 110 DAP, confirmando o alto potencial produtivo do clone CL02-05.

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“…In early stages, the N may favor the development of the shoot, but excess N at the time of tuberization can prevent tuber initiation and filling (Oparka et al 1987;Goins and Yorio 2004). In addition, the high temperatures that occurred during the experimental period (Figure 3) may have favored the synthesis of gibberellin (Figueiredo-Ribeiro et al 2004), reducing tuberization and the number of tubers per plant (Tavares and Lucchesi 1999). The increased air temperature is sufficient to modify the length of the developmental stages of the potato cultivar 'Asterix' (Streck et al 2006) as well as its productivity.…”

Section: Electrical Conductivity Of Nutrient Solutionmentioning

confidence: 99%