Comparative Effect of Composts, Animal Manures and Biochar on Pb Uptake in Two Maize Varieties Grown on Pb Contaminated Alfisol in South Western Nigeria

Morakinyo-Fasipe OlutoyeTemitope and Ayeni Leye Samuel


Full Length Research Paper I Published September ,2019


Journal of Agricultural Science and Food Technology  Vol. 5 (7), pp.140-147.



Screen-house experiments were conducted to determine the effect of poultry manure composted Mexican sunflower (Tithonia diversifolia (CPM), poultry manure alone (UNPM), Composted poultry manure (CMPM), cattle dung composted with Mexican sunflower (Tithonia diversifolia) (CMCD), cow dung alone (UNCD) and biochar (BIO) on soil Pb content and nutrient uptake of maize grown in a soil contaminated with Pb in Ibadan, southwestern Nigeria. Both contaminated (Control L) and uncontaminated (Control N) soils with Pb were used as control. The three levels for all the treatments used except the control experiments were (20, 30 and 40 t/ha). There were twenty-three treatments replicated three times arranged in Completely Randomized Design (CRD) with three replications. The two maize varieties used were DTMA -Y -STR and DTMA –W- STR. This experiment showed that DTMA – Y - STR absorbed less amount of Pb than DTMA W STR. UNCD2 to DTMA –Y- STR compared favourbly with DTMA –Y- STR that served as a control in the contaminated soil. The experiment showed that composted organic manure could help in alleviating metal stress in maize crop grown on Pb contaminated soil and immobilize Pb in the soil. Application of CMP at 20, 30, CMCD 20, 30 and 40 t/ha and BIO 20, 30 and 40 t/ha significantly reduced Pb concentration compared with DTMA –Y- SR grown in contaminated soil. The Pb content in the soil was still high after harvest of the maize. Caution must be exercised when applying organic manures as fertilizers to avoid Pb toxicity in food and pollution in agricultural soils..


KeyWords: Heavy metal, Sunflower, Poultry manure, Cattle dung, Composted poultry manure, Composted cattle dung.


Full Text-PDF