Assessment of composted kitchen waste and poultry manure amendments on growth, yield and heavy metal uptake by Jute mallow Corchorus olitorius Linn.

Oladele A Oguntade,Olubunmi A Odusanya,Adedotun T Adegoke,Solomon O Olagunju,Titilola S Olagbenro,Kayode M Adewusi

doi:10.1007/s40093-018-0232-8

Oladele A Oguntade, Olubunmi A Odusanya + Show 4 more

Open Access

https://doi.org/10.1007/s40093-018-0232-8

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Abstract

PurposeThis study was carried out to compare the effects of composted kitchen waste (KW) and poultry manure (PM) soil amendments on growth, yield and heavy metal uptake in edible leaf of Corchorus olitorius.MethodsKitchen waste and PM composted for 8 weeks were applied as soil amendment at the rate of 0 (no amendment), 5, 10 and 15 t ha−1. Corchorus seeds were sown 2 weeks after incorporation of amendment. Compost amendments were the main treatments while application rates were in sub-plots. Treatments were replicated three times in a randomized complete block design. Corchorus were harvested 6 weeks after sowing, following which growth and yield parameters were measured. Concentrations of manganese (Mn), iron (Fe), copper (Cu) and zinc (Zn) in leaf tissue and plant uptake were also determined.ResultsResult showed that PM increased Corchorus leaf production than KW. Poultry manure significantly (p ≤ 0.01) increased Cu accumulation in leaf. Bioaccumulation of Cu was 0.005 and 0.011 mg kg−1 for KW and PM, respectively. The metals except Zn in leaf tissue showed significant (p ≤ 0.01) correlation with both fresh and dry weights of Corchorus. Despite high concentration of heavy metals in the compost, bioaccumulation in leaf was lower than maximum allowable limit of 0.1 mg kg−1 for Cu and 0.3 mg kg−1 for Mn, Fe and Zn in vegetables by WHO/FAO/FEPA.ConclusionSoil amended with composted KW and PM promoted Corchorus growth and yield. Accumulations of heavy metals in leaf tissue are within allowable limit for vegetables.

Highlights

Management of domestic solid waste generated in most Nigerian homes is a growing challenge that requires urgent attention
The proximate composition of composted kitchen waste (KW) and poultry manure (PM) applied as soil amendment in this study revealed that PM was higher in its organic constituent than KW
It is evident in this study that composted KW can support Corchorus production favourably like composted PM

Summary

Introduction

Management of domestic solid waste generated in most Nigerian homes is a growing challenge that requires urgent attention. Poor management of domestic waste impacts on our environment negatively. With larger proportion of the domestic wastes being organic, an alternative source of compostable materials that could serve as soil ameliorant could become attractive. Use of compostable solid waste as soil amendment in crop production is a sustainable way of recycling that reduces disposal to landfill (Petersen et al 2003; Chen and Jiang 2014). Compost is an important resource for soil amendment in organic farming with the benefits of being environment-friendly. Composted organic manure especially from poultry wastes have been reported to improve mineral composition in tissues of vegetables such as Jute mallow (Mazen et al 2010; Jonathan et al 2012). In contrast to the beneficial roles of compost, it could be a potential source of contaminants depending on its origin (Petersen et al 2003; Hanč et al 2008)

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