Quantidades e períodos de incorporação de palha de carnaúba misturada com esterco bovino no desempenho agroeconômico da rúcula.

Abstract

The use of existing organic waste in production areas is of paramount importance for small producers of vegetables. In this sense, the objective was to evaluate the use of different amounts of carnauba straw mixed with manure in agroeconomic performance of the arugula. The experiment was conducted at the Fazenda Experimental Rafael Fernandes, in Alagoinha district, a rural area of Mossoró-RN, from July to October 2014. The experimental design was a randomized complete block design with treatments arranged in a factorial 5 x 4 with three replications. The first factor consisted of the combination of five amounts of carnauba straw mixed with manure (0.0, 0.8, 1.6, 2.4 and 3.2 kg m-2 bed) and the second factor by incorporating periods (14, 28, 42 and 56 days before sowing). The cultivar used was "Cultivada". The characteristics evaluated were: plant height, number of leaves plant-1, productivity, number of bunches and dry mass of the arugula. Economic indicators were used, such as (gross income, net income, cost of production, rate of return, profit margin. There was no significant interaction between the factors-treatments. The best agronomic performance was observed in the amount of 3.2 kg m-2 mixed carnauba straw bed with cattle manure, after 47 days of incorporation, with productivity of 1.7 and 1.5 kg m-2 construction site green mass of arugula, respectively. The most economic efficiency was observed in the amount of 3.2 kg m-2 site for 47 days of carnauba straw mixed with manure incorporation, with average values of gross income of R $ 5521.00 and 4605.00; net income of R $ 5223.20 and 3831.00; return rate of R $ 7.60 and 6.00 and 88.50 and 86.00% of profit margin, respectively, for a production area of 100 m2 site. The use of carnauba straw mixed with cattle manure provided agroeconomic performance for arugula therefore constitutes a viable alternative to the producer.