Abstract
Lack of cultivar adapted to the planting area, as the ideal harvest period undertakes the productive potential of cassava. The study was conducted to evaluate the influence of different harvest seasons on total production of fresh and dry weight of four cassava cultivars. The used cultivars were: Branca de Santa Catarina (BSC), IAC 13, IAC 14-18 and Fiber that they were planted on 09/20/11 at the headquarters of the Regional Center Valley Paranapanema Paulista Agency for Agribusiness Technology (APTA), in Assis, São Paulo. The experimental design was completely randomized in 4x6 (four cultivars and six harvest seasons) factorial schemes with four replicates, being 4, 8, 12, 16, 20 and 24 months after planting (MAP) the harvest season, totaling 24 treatments and 48 installments. The total production of fresh biomass (FB) and dry matter (DM) in tons per hectare of 12 plants per harvest season was evaluated. Regarding the production of FB as DM among cultivars was not observed significant differences between them. However, the cultivars showed accumulation of FB linearly. The best time to harvest in order to higher accumulation of DM occurred at 12 and 24 months, corresponding to the end of the first and second round of cassava cultivation, respectively. Key words: Manihot esculenta Crantz, precocity, production potential.
Highlights
The cassava plant (Manihot esculeta Crantz) belongs to the family Euphorbiaceae, originally from the American tropics where it is cultivated for nearly four thousand years
The study was conducted to evaluate the influence of different harvest seasons on total production of fresh and dry weight of four cassava cultivars
The dry matter (DM) content is usually the feature that determines the greater or lesser amount paid by industries from producers at the time of marketing, since it is directly related to the performance of various industrial products derived from cassava (Schons et al, 2007)
Summary
The cassava plant (Manihot esculeta Crantz) belongs to the family Euphorbiaceae, originally from the American tropics where it is cultivated for nearly four thousand years. It is currently one of the crops with the highest potential for energy production even at low agronomic conditions and limited economic partner, since cassava has drought resistance, tolerance to low soil fertility, which facilitates its cultivation and promote a high yield potential (El-Sharkawy et al, 2008). In Brazil conditions, the current crop has grown just over 2.3 million hectares, with an estimated production of 23.4 million tons of cassava roots and yield per area of 17.7 t ha-1. This research was carried out with the objective of evaluating the influence of different harvest seasons on total production of fresh and dry weight of four cassava cultivars
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