Quantidades e períodos de incorporação da palha de carnaúba (copernicia prunifera) na viabilidade agroeconômica do coentro.

Abstract

The use of waste organic wastes after processing is of paramount importance to small producers of vegetables. In this sense, the objective was to evaluate different amounts and periods of incorporation of the carnauba straw in the agroeconomic performance of the coriander. The experiment was conducted at the Rafael Fernandes Experimental Farm, in the Alagoinha district, in the rural area of ​​Mossoró-RN, from July to October 2014. The experimental design was a randomized complete block, with treatments arranged in factorial scheme 5 x 4, with three replicates. The first factor consisted of the combination of five quantities of carnauba straw (0.0, 1.5, 2.5, 3.5, and 4.5 kg m-2 of bed) and the second factor by the incorporation periods (21, 42, 63, and 84 days before sowing). The cultivar of coriander used was the "Verdão". The evaluated characteristics were: plant height, number of stems, green mass, number of sauces and dry mass of coriander. Economic indicators were used, such as: gross income, net income, rate of return and profitability index. There was a significant interaction between the factors-treatments for green mass, number of sauces and dry mass, except for plant height and number of stems. The best agronomic performance was observed in the amount of 4.5 kg m-2 of carnauba straw with the average number of sauces of 7.5; 8.0; 15.4 and 16.0 in the periods of 21; 42; 63 and 84 days before sowing respectively. The highest economic efficiency was observed in the amount of 4.5 kg m-2 to the 84 days of incorporation of carnauba straw, with average gross income values ​​of R $ 2,445.00; net income of 1,840.00; rate of return of R $ 3.00 and profitability index of 75.3%, for a production area of ​​100 m2 of plot.