Classic growth analysis in three potato (Solanum tuberosum L.) varieties
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Abstract
were collected every decennial from three potato varieties
developed under field conditions at the experimental areas
of the National Institute of Agricultural Sciences, with
the aim of evaluating the behaviour of different growth
indexes: Leaf Area Index (LAI), Net Assimilation Rate
(NAR), Relative Growth Rate (RGR) and Crop Growth Rate
(CGR), as well as Source Power (SP) and Demand Power
(DP). Thus, seed tubers imported from Call White, Santana
and Spunta varieties were planted in three plots following
a sample design during 2010 and 2011. Cultural farming
was performed according to the Technical Instructions for
potato crop. Samplings to gather primary data started 30
days after planting until harvesting. Every time, 10 plants
were randomly sampled per each variety, in order to know by
oven drying the amount of dry biomass produced in different
organs and to estimate leaf area from linear measurements
of leaves as well as using previously obtained regression
equations. Mean, maximum and minimum temperatures
were recorded along crop cycle. Differences on the indexes
evaluated were detected between varieties. Likewise, the
influence of temperatures on growth is discussed in general,
due to its importance in dry mass production.
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