Circular economy fertilization: Phycoremediated algal biomass as biofertilizers for sustainable crop production

There is an urgent need to meet the demand of water and nutrients by their reuse and recycling to gratify sustainable food production system and resource conservation. Chlorella minutissima was found to be very effective in the removal of electrical conductivity (EC), total dissolved solids, phospho...

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Bibliographic Details
Published in:Journal of environmental management 2021-06, Vol.287, p.112295-112295, Article 112295
Main Authors: Sharma, Gulshan Kumar, Khan, Shakeel Ahmad, Shrivastava, Manoj, Bhattacharyya, Ranjan, Sharma, Anil, Gupta, Dipak Kumar, Kishore, Prabhat, Gupta, Navindu
Format: Article
Language:English
Subjects:
Biofertilizers
Biomass
Chlorella
Crop Production
Fertilization
Fertilizers - analysis
Microalgae
Nitrogen
Phycoremediation
Plant nutrition
Soil
Soil improvement
Wastewater
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Summary:There is an urgent need to meet the demand of water and nutrients by their reuse and recycling to gratify sustainable food production system and resource conservation. Chlorella minutissima was found to be very effective in the removal of electrical conductivity (EC), total dissolved solids, phosphorous (P), potassium (K), ammonium, nitrate, biological oxygen demand (BOD5) and chemical oxygen demand (COD) of sewage wastewater. We tested the effects of phycoremediated algal biomass addition to soil in field plots of baby corn and spinach, on plant growth, yield and soil chemical properties. The application of 100% nitrogen (N) fertilizer by algal biomass lead to higher economic yield of spinach and baby corn than recommended dose of mineral fertilizers. The available N and P content in experimental plots applied with algae biomass as biofertilizers were significantly higher than other treatments. The soil enzymes, such as urease, nitrate reductase, and dehydrogenase were analysed during the cropping season of baby corn and spinach. The soil supplied with 100% N by algae biomass (C. minutissima) significantly (P 
ISSN:0301-4797
1095-8630
DOI:10.1016/j.jenvman.2021.112295