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Utilization of seaweed Ulva sp. in Paracas Bay (Peru): experimenting with compost

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Abstract

In Paracas Bay (Peru), large quantities of Ulva sp. interfere with various important activities of the zone. In this context, the present study was undertaken to evaluate the effect of adding Ulva sp. in compost piles and the quality of the resulting composts. Six compost piles were prepared using, straw, green material mixture, cow manure and Ulva in different quantities (9, 17 and 28% of volume) and forms. Several variables were monitored during the process and the chemical characteristics of the final composts were determined. Aerial biomass achieved by maize plants was also evaluated for each compost at different compost/sand proportions. Results show that the compost pile made with Ulva powder registered the highest temperature and the longest thermophilic phase. Piles prepared with 28% washed Ulvapresented anoxic conditions at the beginning and had higher electrical conductivity values. Carbon/Nitrogen ratio diminished appropriately in all piles and there was no negative effect observed on the pH of the piles. Compost prepared with Ulva had lower contents of Total Kjeldahl Nitrogen, and produced maize plants aerial biomass.

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Correspondence to Tania Mendo Aguilar Wosnitza.

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Wosnitza, T.M.A., Barrantes, J.G. Utilization of seaweed Ulva sp. in Paracas Bay (Peru): experimenting with compost. J Appl Phycol 18, 27–31 (2006). https://doi.org/10.1007/s10811-005-9010-x

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  • DOI: https://doi.org/10.1007/s10811-005-9010-x

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