Produtividade agroeconômica de mandioquinha-salsa cultivada em solo coberto com diferentes doses e resíduos base de cama de frango, propagadas com diferentes tamanhos de mudas

Abstract

The use of organic wastes added to the soil is a recommended practice to ensure good production of arracacha. Profitability studies are crucial in any business, and it can be decisive regarding the success or failure of the farmer. Seedling quality is a determining factor for the crop cycle as well as for the final yield. The aim of this study was to evaluate the agro-economic yield of arracacha cultivated in soil covered with different base wastes and doses of poultry litter, propagated with different sizes of seedlings. Two experiments with arracacha plants were conducted between May 2014 and January 2015. The first experiment was cultivated in soil covered with different doses of poultry litter (0; 5; 10; 15 and 20 t ha-1) and different base wastes (sawdust and rice hulls). The factors were arranged in a 5 x 2 factorial scheme in a randomized complete block design, with ten treatments and four replications. In the second experiment, we studied the agro-economic yield of arracacha propagated with different seedling sizes and cultivated in soil covered with different base wastes of poultry litter (sawdust and rice hulls), with a 10 t ha-1 dose. The factors were arranged in a 4 x 2 factorial scheme in a randomized complete block design, with eight treatments and five replications. In the first experiment, we concluded that the highest yield of tradable roots was obtained with the adjusted dose of 16 t ha-1 of poultry litter of sawdust waste. The highest gross and net incomes were obtained with the cultivation of arracacha plants in soil covered with 15 t ha-1 of poultry litter of sawdust waste. For the second experiment, the conclusion is that the T2 seedling size presented the highest yields and the highest amount of tradable roots and shoots. In order to obtain higher yields and higher net income, the cultivation of arracacha plants should be done in soil covered with poultry litter of sawdust and rice hulls base wastes, using T2 seedling size.