Cama-de-frango e espaçamentos entre plantas na produção agroeconômica de mandioquinha-salsa (Arracacia xanthorrhiza Bancroft)

Abstract

The aim of this study was to evaluate how the addition of chicken manure, the planting spacings and the size of seedlings could induce a greater commercial yield of Peruvian carrots, as well as determining the cost of production and the gross and net incomes besides identifying best crop management for improving the nutritional values of their amidic compounds. Therefore, two field experiments were carried out between March 2009 and January 2010. The treatments of the first experiment were arranged as 4 x 2 factorial, as a combination of four different ways of addition (10 ton ha-1 in coverage; 10 ton ha-1 incorporated to the soil; 5 ton ha-1 in coverage + 5 ton ha-1 incorporated to the soil; and without manure) and two planting spacings (7,87 and 9,84 inches). The second experiment were arranged in a 2 x 5 factorial, with two planting spacings (7,87 and 9,84 inches) and five seedlings average masses (M1 = 12.26 g; M2 = 7.76 g; M3 = 5.58 g; M4 M5 = 3.98 g = 2.73 g). Each treatment followed a randomized block design, with five and four replications, respectively. Based on the results obtained in the scope of the experiment, we concluded that to reach higher yields of marketable roots and higher net income the Peruvian carrots cultivated in beds should be done at planting spacing of 9,84 inches, using chicken manure incorporated to the soil and seedlings with average masses of 7.76 g. The highest levels of protein were found in the leaves and the shoots when used the chicken manure. Total calorific values were higher in the roots and the shoots and higher lipids values on the shoots, both without the use of chicken manure. Highest percentages of total sugars were found in the roots and the crowns.