Effect of organic manuring to pineapple cv. pérola in a Regosol

Abstract

The results of an experiment conducted at the Experimental Field of Quiçamã, Macaé County in the State of Rio de Janeiro, are shown. The main objective of the experiment was utilization of a very sand soil (Regosol) for pineapple breeding. Three different kinds of organic manure were used: barnyard manure, sugar cane filter press cake and chicken manure. All the plants forming the experiment received a basic NPK fertilization with chemical fertilizers. A completely randomized block design with four treatments and five replications were used. After the first harvesting, at 1% of probability, the data collected showed that there were differences among treatments concerning to weight and fruit length, fruit diameter (obtained in the middle of the fruit), crown weight and number of slips per plant. No difference was found related to total acidity, total soluble solids (brix) pith diameter and length of fruit's pith. The use of barnyard manure, sugar cane filter press cake, and chicken manure, gave a fruit production with mean weight of 1,479.89; 1,331.0 g and 1.203.49 respectively, while the mean weight without organic manure was 680.0g. yet there was not significant difference between barnyard manure and sugar cane filter press cake nor between sugar cane filter press cake and chicken manure. The use of barnyard manure increased slips production obtaining an average number of 7.3 slips per plant. On the other hand, plants without organic manuring produced an average of 5.8 slips per plant.