The production of Peruvian carrot clones was evaluated in response to calcium-magnesium silicate, through an experiment carried out in Viçosa, Minas Gerais State, from May 2004 to March 2005. The experiments were arranged in a complete randomized design, in a 9 x 2 factorial scheme, with the nine clones (Araponga, BGH-4550, BGH-5742, BGH-5744, BGH- 5747, BGH-6417, BGH-6425, BGH-6525 and Senador Amaral) cultivated with and without calcium-magnesium silicate (2,500 kg ha-1), with three repetitions. Plants were harvested 304 days post-planting, and the assessed parameters included plant height and diameter, fresh mass of aerial part, commercial roots per plant and yield of commercial and noncommercial roots (rejects), rotten roots and crown, measured in kg ha-1. There was no significant effect of calcium-magnesium silicate application on the yield of commercial roots. Senador Amaral, Araponga, BGH-5747, BGH-5742 and BGH-4550 were the most productive clones, with all having commercial yields above 18,000 kg ha-1. Clone BGH-5744 gave the lowest yield of commercial roots, although it stood out for plant height, diameter and production of fresh mass of aerial part. Further research is recommended to evaluate the effect of calciummagnesium silicate on the production of Peruvian carrot commercial roots and resistance to diseases.
Arracacia xanthorrhiza; genotypes; siderurgical waste; yield
