Potential of Fish Pond Sediments Composts as Organic Fertilizers
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ORIGINAL PAPER
Potential of Fish Pond Sediments Composts as Organic Fertilizers D. Dróżdż1 · K. Malińska1 · M. Kacprzak1 · M. Mrowiec1 · A. Szczypiór1 · P. Postawa2 · T. Stachowiak2 Received: 1 November 2019 / Accepted: 16 April 2020 © The Author(s) 2020
Abstract Increased fish pond production is associated with the generation of various waste including fish pond sediments. Fish pond sediments could be a valuable source of nutrients for growing plants, however they require further processing in order to be applied to soil. Composting is considered one of the methods for processing fish pond sediments. The aim of this work was to investigate the potential of organic fish pond sediments to be managed through laboratory composting with selected waste materials and evaluate the fertilizing potential of the obtained compost. The scope included: (1) analysis of organic fish pond sediments, (2) laboratory composting of organic fish pond sediments with wheat straw and green grass, (3) analysis of the obtained composts, (4) preparation of growing media with selected additives, (5) analysis of the properties of the prepared growing media and (6) analysis of the effect of the investigated growing media on the growth of Phaseolus vulgaris L. in pot experiments. The addition of cardboard waste and woodchips derived biochar to the obtained compost improved significantly the growth of the roots of Cardamine L. Also, the content of carbon and nitrogen in the compost mixtures increased. The addition of M1 (compost from organic fish pond sediments and 1% of biochar) to the soil had a significant impact on the growth of white beans. Graphic Abstract
Keywords Organic fish pond sediments · Organic aquaculture · Organic fertilizers · Organic waste · Composting · Fertilization
* D. Dróżdż [email protected] Extended author information available on the last page of the article
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Statement of Novelty Intensive organic aquaculture can generate significant amounts of waste, in particular such as fish pond sediments removed periodically from fish tanks or ponds. This type of waste material can be a source of many nutrients with a fertilizing potential. The literature provides numerous examples of studies on management of fish pond sediments coming from conventional aquaculture systems. However, there is little known about physical and chemical properties and management practices for fish pond sediments from organic aquaculture. The presented study on fish pond sediments from organic aquaculture of trout can contribute to the advancement of the state of the art by providing information on the physical and chemical properties of fish pond sediments. We hypothesized that fish pond sediments from organic aquaculture can be managed through composting as an alternative to storing or direct landfilling of fish pond sediments. Composting can be applied as a method for managing fish pond sediments on site, i.e. on an organic fish farm, with other typically available waste materials such as straw or grass. In
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