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Revista Ciência Agronômica
On-line version ISSN 1806-6690
CAVALCANTE, Lourival Ferreira et al. Nutritional status of the sugar apple under organic fertilizing of the soil. Rev. Ciênc. Agron. [online]. 2012, vol.43, n.3, pp. 579-588. ISSN 1806-6690. http://dx.doi.org/10.1590/S1806-66902012000300022.
From August 2009 to July 2010, an experiment was conducted in a sugar-apple orchard (Annona squamosa L.) in the town of Remigius PB, in order to evaluate the levels of macro and micronutrients and the leaf tissue of the plants in a soil treated with cattle manure and poultry litter. The treatments were distributed into randomized blocks, with plots split with time, three replications and two plants per plot, in a 2 × 5 × 2 factorial arrangement, corresponding to two sources of organic matter of animal origin (cattle manure and poultry litter), five doses of organic material by volume (0.0, 3.5, 5.3, 7.1 and 8.9%), and two periods of plant evaluation, 36 and 48 months after transplanting. The doses of organic material were set based on the organic-matter content of each source. With the exception of magnesium and zinc, the organic-matter sources did not differ statistically from the levels of other nutrients in the leaf dry-matter of the plants. The greatest accumulation of nutrients in the leaf dry-matter of the sugar apple was in the dosage-range of between 6.01 and 8.65% of organic matter.
Keywords : Sugar apple; Cattle manure; Poultry litter.