ISSN: 1659-2751



Study of the Nutritional Quality of Organic Fertilizers Produced with Pineapple Aerial Biomass Combined with Cattle Manure and with Chicken Manure


Management of pineapple biomass waste is a concern because it is responsible for severe environmental pollution problems. There is a need to develop new environmentally-friendly options which will alleviate the contamination problems and simultaneously provide benefits to production systems. Production of compost from pineapple biomass was evaluated as an alternative to the pineapple biomass management currently used. An experiment was conducted to evaluate the composting process and quality of compost produced from pineapple foliar biomass combined with chicken litter and cattle manure. The composting process lasted 60 days; the temperature was determined every three days and the C:N ratio was quantified every 15 days. The contents of C, N, P, K, Ca, Mg, Fe, Cu, Zn, and Mn were determined at the end of the process. The temperature initially increased to about 65 °C within three days and then decreased to about 28 °C within 30 days. Values of C:N ratios decreased from an initial range of 22 and 30 to values between 8 and 10 at the end of the process. Final C:N ratio values indicate that all three pineapple composts have high potential to mineralize N, after their application to the soil. Nutrient content, especially N, P, and K content, of all three composts met nutritional quality standards. Humic acid content in all three composts was high, suggesting that these composts can be used as sources for humic acid extracts. There were no significant differences in quality parameter between compost from pineapple and compost from pineapple combined with chicken litter or cattle manure. In conclusion, production of compost is a viable alternative to current pineapple biomass waste management; however, the results of this study do not support the use of animal manure in the production process.

Key words: organic fertilizer, humic acids, cattle manure, compost, pineapple waste, chicken litter, C:N ratios.

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