Abstract
ABSTRACT The plant management used in potato crop is usually similar across the main producing regions in Brazil. Same plant spacing are commonly used, despite the differences in climate and soil of the various potato planting areas. The objective of this work was to evaluate the yield of potato cultivars in response to different plant spacing. Experiments were conducted in the field, and the treatments consisted of three cultivars (Agata, BRS Clara and BRS F63 Camila) and three plant spacing (20, 25 and 30 cm) in randomized blocks with three repetitions in two years. The total, marketable and non-marketable tuber yield, total and marketable number of tubers per area and size class, mean total and marketable tuber weight and percentage of tuber dry weight of the tubers were evaluated. Camila was the cultivar with highest yield when spaced 20 cm due to the greater number of tubers in the marketable class 100-200 g. In the 25 and 30 cm plant spacing, there was no difference in yield among cultivars. Depending on the cultivar and the destination of the harvested tubers, producers can choose the most appropriated plant spacing.
Highlights
As práticas fitotécnicas utilizadas no cultivo da batata se assemelham nas principais regiões produtoras do Brasil
The cultivars differ morphologically in its capacity to compensate for variations in plant spacing, and each cultivar has a plant density that results in maximum yield (Mauromicale et al, 2003)
There was a difference in noncommercial tuber yield only for plant spacing (Table 1)
Summary
As práticas fitotécnicas utilizadas no cultivo da batata se assemelham nas principais regiões produtoras do Brasil. O objetivo deste trabalho foi avaliar a produtividade de cultivares de batata em resposta a diferentes espaçamentos de plantio. Results of studies indicate that potato yield, in response to different plant densities, is directly influenced by the environment and by the cultivar (Tarkalson et al, 2012). Tuber development and production with the variation of plant spacing has been different in distinct cultivars used by producers. Determining the yield response of tubers to different plant population is a recurrent study area (Rex, 1991; Rykbost & Maxwell, 1993; Zebarth et al, 2006), because interactions among technical, genetic and commercial factors are in constant changes and adjustments
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