Doses of chicken manure and planting density on yield of ‘Amarela de Carandaí’ peruvian carrot

Abstract

The aim was to study the plant density and the dose of chicken manure that induce higher productivity of fresh roots of peruvian carrot. The work was carried out in Dourados-MS, between March, 2007, and January, 2008, in a Distroferric Red Latossol, with a very clayey texture. The cultivation was done in soil covered with chicken manure – DF (0, 5, 10, 15 and 20 t ha-1) and with two (2F) or three (3F rows) of plants per plot (60 e 33,3 cm rows per plot) which resulted in 66,000 and 99,000 plants ha^-1. Those ten treatments were arranged as a 5 x 2 factorial scheme in randomized block experimental design, with four replications. Harvests were done on 210 and 248 days after planting (DAP), when plants showed more than 50% and 70% of leaf senescence, respectively. On 248 DAP, plant height showed linear growth as a function of CF doses, and the highest value was 24.20 cm under 20 t ha^-1 of CF. Fresh mass of leaves, crowns and shoots were influenced significantly by CF doses. The greatest yield, regarding to number of rows, were obtained with 3F on both two harvests. On 228 DAP, the greatest yield of commercial roots was 14.00 t ha^-1 with 20 t ha^-1 of CF. Fresh mass of non-commercial roots on 210 DAP was influenced significantly by chicken manure doses and number of rows per plot interaction, and showed quadratic growth with different rates. The greatest yield of commercial roots was obtained with three rows of plants, using 20 t ha^-1 of chicken manure, harvested on 248 DAP, with 70% of leaf senescence.