Resumo

CUENYA, María I. et al. Effects of filter cake incorporation and different planting densities on the productive capacity of a healthy LCP85-384 sugarcane variety (Saccharum spp.) nursery. Rev. ind. agríc. Tucumán [online]. 2007, vol.84, n.1, pp.1-8. ISSN 1851-3018.

High cost of healthy seedcane leads producers to implement various management practices that will optimize productivity in nurseries. This work aims at evaluating different management alternatives for planting healthy hot-water-treated LCP85-384 seedcane, combining different bud densities with or without scattering filter cake at furrow bottom. A trial was organized in Divided Plots with three replicates. In the principal plots filter cake addition (or its absence) was tested. The subsidiary plots presented the following planting densities per row linear meter: three, six and nine one-joint buds, two and three setts with three buds each (2 x 3Y y 3 x 3Y, respectively) and a halved stalk. Stalk number/plot, average stalk height, bud number/stalk linear meter and bud number/plot were assessed in plant cane and first ratoon. Analysis of variance and means comparison tests (Fisher's DLS) were conducted. Highly significant differences were found among the subsidiary treatments in terms of total stalk number/plot (plant cane and first ratoon) and average stalk height (plant cane). For both variables and both crop ages, the highest values were obtained in the subsidiary treatments involving setts, and the lowest ones in individual bud trials. There were highly significant differences between primary and subsidiary treatments regarding total bud number/plot, obtained throughout the two years of the trial. For this variable, which is important in the case of a two-year-old nursery, the 3 x 3Y treatment turned out to be the best planting alternative, presenting significant differences when compared with the other assayed densities. Filter cake application was found to be convenient for taking advantage of a nursery during two cropping ages.

Palavras-chave : Healthy seedcane; High reproduction rates; Nursery management; Bud production.

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