Bibliographic citations
Díaz, O., (2017). Aplicación de aditivos minerales para la reducción de pérdidas de nitrógeno por volatilización durante el compostaje de pulpa de café [Universidad Nacional Agraria La Molina]. https://hdl.handle.net/20.500.12996/2881
Díaz, O., Aplicación de aditivos minerales para la reducción de pérdidas de nitrógeno por volatilización durante el compostaje de pulpa de café []. PE: Universidad Nacional Agraria La Molina; 2017. https://hdl.handle.net/20.500.12996/2881
@misc{sunedu/3013361,
title = "Aplicación de aditivos minerales para la reducción de pérdidas de nitrógeno por volatilización durante el compostaje de pulpa de café",
author = "Díaz Arca, Oswaldo Arturo",
publisher = "Universidad Nacional Agraria La Molina",
year = "2017"
}
The coffee crop, an important product of the agro-industrial export, generates diverse residues; among them, the coffee pulp. Generally in the composting of pulp, nutrients are not taken advantage correctly due to the poor conditions of composting. An experiment was carried out with the objective of evaluating the effect of the application of two mineral amendments (forest clay and zeolite) on the loss of nitrogen by volatilization during the composting of coffee pulp mixed with rabbit manure and ashes, and composting of coffee pulp mixed with lawn trimming in equal proportions, rabbit manure and ashes. Composting was carried out in micropiles. Residues were placed in buckets of 75 liters in amount equivalent to 5 kg of dry matter. Mineral amendments were applied to 10 % of dry weight. A control without amendment application was added for each residue mix. The variables temperature, bulk density, moisture content, electrical conductivity, pH, nitrogen and organic carbon content, C/N ratio, humic acid/fulvic acid ratio and germination index were evaluated. The days of evaluation varied between 0, 43, 48, 67, 68, 78, 117 and 130 days after the installation. In the composting of only coffee pulp, the zeolite recovered significantly more nitrogen than the control, while the clay recovered nitrogen although without significant difference. In the composting of coffee pulp mixed with lawn trimming, the amendments did not increase nitrogen recovery. The mixture of coffee pulp with lawn trimming produced a compost with better characteristics (moisture retention, bulk density, temperature, pH, organic carbon, HA/FA ratio and germination index) during composting and in harvested compost, compared to compost of only coffee pulp as main organic input.
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