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Assessment of nutrient quality, heavy metals and phytotoxic properties of chicken manure on selected commercial vegetable crops
Due to rapid expansion in the poultry industry, production of poultry manure has also consequently increased, resulting in unplanned disposal of this manure to the soil in some cases, with possible negative environmental consequences. In this study, 10 separate poultry manure samples were collected...
Autores principales: | , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Elsevier
2018
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5760451/ https://www.ncbi.nlm.nih.gov/pubmed/29326987 http://dx.doi.org/10.1016/j.heliyon.2017.e00493 |
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author | Ravindran, Balasubramani Mupambwa, Hupenyu A. Silwana, Sibongiseni Mnkeni, Pearson N.S. |
author_facet | Ravindran, Balasubramani Mupambwa, Hupenyu A. Silwana, Sibongiseni Mnkeni, Pearson N.S. |
author_sort | Ravindran, Balasubramani |
collection | PubMed |
description | Due to rapid expansion in the poultry industry, production of poultry manure has also consequently increased, resulting in unplanned disposal of this manure to the soil in some cases, with possible negative environmental consequences. In this study, 10 separate poultry manure samples were collected from different sites located in the central Eastern Cape, South Africa and characterized for chemical and phytotoxic properties. The poultry manures had an average neutral pH (range 6.94 − 7.97) whilst the electrical conductivity was highly variable from 2.45 dS/m to 12.3 dS/m between the 10 sites. The high conductivity values recorded in some of the manures indicate that caution may need to be practiced when directly applying these manure to the soil, to avoid buildup of soluble salts. All samples showed a very high concentration of total P (1963.1 mg/kg − 2644.1 mg/kg) with the plant available fraction ranging from 21.3% − 37.7% of the total P. All the heavy metals measured (Cr, Cu, Ni, Pb and Zn) were below the maximum permissible limits set by the U.S. Environmental Protection Agency. However, some of the poultry manure showed some level of phytotoxicity based on the plant bioassay, with some samples, recording a germination index less than 50% for the different crops evaluated. However, this bioassay may not be conclusive and there is need to evaluate this phytotoxicity in real world field applications as there is paucity of information on this aspect regarding poultry manure. Such filed studies can be used to evaluate alternative strategies such as planting and harvest intervals between application of these manures and planting or harvesting. It is also suggested that further biodegradation through composting or vermicomposting may be required to improve nutrient content and reduce the presence of phytotoxic compounds in some of the poultry manures before use as soil amendments. |
format | Online Article Text |
id | pubmed-5760451 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2018 |
publisher | Elsevier |
record_format | MEDLINE/PubMed |
spelling | pubmed-57604512018-01-11 Assessment of nutrient quality, heavy metals and phytotoxic properties of chicken manure on selected commercial vegetable crops Ravindran, Balasubramani Mupambwa, Hupenyu A. Silwana, Sibongiseni Mnkeni, Pearson N.S. Heliyon Article Due to rapid expansion in the poultry industry, production of poultry manure has also consequently increased, resulting in unplanned disposal of this manure to the soil in some cases, with possible negative environmental consequences. In this study, 10 separate poultry manure samples were collected from different sites located in the central Eastern Cape, South Africa and characterized for chemical and phytotoxic properties. The poultry manures had an average neutral pH (range 6.94 − 7.97) whilst the electrical conductivity was highly variable from 2.45 dS/m to 12.3 dS/m between the 10 sites. The high conductivity values recorded in some of the manures indicate that caution may need to be practiced when directly applying these manure to the soil, to avoid buildup of soluble salts. All samples showed a very high concentration of total P (1963.1 mg/kg − 2644.1 mg/kg) with the plant available fraction ranging from 21.3% − 37.7% of the total P. All the heavy metals measured (Cr, Cu, Ni, Pb and Zn) were below the maximum permissible limits set by the U.S. Environmental Protection Agency. However, some of the poultry manure showed some level of phytotoxicity based on the plant bioassay, with some samples, recording a germination index less than 50% for the different crops evaluated. However, this bioassay may not be conclusive and there is need to evaluate this phytotoxicity in real world field applications as there is paucity of information on this aspect regarding poultry manure. Such filed studies can be used to evaluate alternative strategies such as planting and harvest intervals between application of these manures and planting or harvesting. It is also suggested that further biodegradation through composting or vermicomposting may be required to improve nutrient content and reduce the presence of phytotoxic compounds in some of the poultry manures before use as soil amendments. Elsevier 2018-01-11 /pmc/articles/PMC5760451/ /pubmed/29326987 http://dx.doi.org/10.1016/j.heliyon.2017.e00493 Text en © 2017 The Authors http://creativecommons.org/licenses/by-nc-nd/4.0/ This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/). |
spellingShingle | Article Ravindran, Balasubramani Mupambwa, Hupenyu A. Silwana, Sibongiseni Mnkeni, Pearson N.S. Assessment of nutrient quality, heavy metals and phytotoxic properties of chicken manure on selected commercial vegetable crops |
title | Assessment of nutrient quality, heavy metals and phytotoxic properties of chicken manure on selected commercial vegetable crops |
title_full | Assessment of nutrient quality, heavy metals and phytotoxic properties of chicken manure on selected commercial vegetable crops |
title_fullStr | Assessment of nutrient quality, heavy metals and phytotoxic properties of chicken manure on selected commercial vegetable crops |
title_full_unstemmed | Assessment of nutrient quality, heavy metals and phytotoxic properties of chicken manure on selected commercial vegetable crops |
title_short | Assessment of nutrient quality, heavy metals and phytotoxic properties of chicken manure on selected commercial vegetable crops |
title_sort | assessment of nutrient quality, heavy metals and phytotoxic properties of chicken manure on selected commercial vegetable crops |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5760451/ https://www.ncbi.nlm.nih.gov/pubmed/29326987 http://dx.doi.org/10.1016/j.heliyon.2017.e00493 |
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