Resumo

DIGONZELLI, Patricia A.; ROMERO, Eduardo R.; SCANDALIARIS, Jorge  e  GIARDINA, Juan. Assessment of first ratoon seedcane quality obtained through different methods. Rev. ind. agric. Tucumán [online]. 2009, vol.86, n.1, pp.1-8. ISSN 1851-3018.

Seedcane production components were assessed in first ratoon (cane from second cut) from Registered Nurseries obtained through micropropagation and hot water treatment (50ºC, 2 h) of LCP 85-384, CP 65-357 and CP 48-103 cultivars. Micropropagated and hot-water-treated seedcane was free from ratoon stunting disease (RSD) (Leifsonia xyli subsp. xyli) and leaf scald (Xanthomonas albilineans). A completely randomized factorial design (3x3x2) with four replications was used and the evaluated treatments were: two origins (micropropagation and hot water treatment) and three varieties (LCP 85-384, CP 65-357 and CP 48-103). Each experimental plot consisted of five three-meter-long rows, and the three central ones were assessed. During harvest in the nursery, stalks in the plots were counted, and their height up to +1 leaf was measured. In a 36-stalk sample, stalk weight and diameter of middle part, and bud number per stalk and row were assessed. With these data, bud numbers per 100-meter-long rows and cane yield per plot were calculated. Micropropagation resulted in taller and heavier stalks and higher cane yield as compared with hot water treatment. Nevertheless, cane origin did not lead to significant differences as regards stalk number, diameter and bud number. Variety affected all seedcane production components significantly, except for stalk height, which depended solely on seedcane origin.

Palavras-chave : Seedcane; Nurseries; Micropropagation; Hot water treatment.

        · resumo em Espanhol     · texto em Espanhol     · Espanhol ( pdf )