Resumo

REBORA, Cecilia; LELIO, Horacio; IBARGUREN, Leandra  e  GOMEZ, Luciana. Effect of plant population density on tuber yield of Jerusalem artichoke (Helianthus tuberosus L.) urban waste water irrigated. Rev. Fac. Cienc. Agrar., Univ. Nac. Cuyo [online]. 2011, vol.43, n.2, pp.83-90. ISSN 1853-8665.

Jerusalem artichoke (Helianthus tuberosus L.) produces tubers that can be fermentated for ethanol production. It is possible to use urban waste waters for irrigation when the crop is destinated to energy purposes. Plant population density in a Jersusalem artichoke crop affects growth parameters and yield. Effect of plantation density on tuber yield was evaluated. Six density treatments were compared, combining 2 spacings between rows (0.70 and 0.80 m) and 3 spacings between plants on the row (0.30, 0.40 and 0.50 m), generating stands between 25,000 and 47,600 plants/ha. The higher yields occurred in densities generated by 0.30 and 0.40 m between plants on the row, but there were no differences for distances between rows (0.70 and 0.80 m). Yield components (tubers weight per plant, number of tubers per plant and tuber weight) changed with changes in density generated by spacings between plants on the row. Plant height, number of stems, dry matter and soluble solids in tubers did not change with changes in crop density.

Palavras-chave : Urban waste-water; Energy crops; Jerusalem artichoke; Plant population density; Tuber yield.

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