Yield of maize (Manoma spp) affected by automobile oil waste and compost manure

Abstract

The study is aimed at evaluating the effects of compost manure on the remediation of automobile oil waste polluted soils, and on the yield parameters (plant height, leave surface and dry matter weight) of maize (Manoma spp). Analyses of soil samples of contaminated and uncontaminated sites collected with core samplers at 10 cm depth and auger samplers at two depths (surface, 0 -20 cm; subsurface, 20 -40 cm) were examined for chemical and physical properties, including poly aromatic hydrocarbons. Polluted soils were biotreated for testing maize in a greenhouse. Soil physical and chemical properties decreased with depth and were significantly (P<0.05) affected by contamination. Decreases in soil poly aromatic carbon from original concentration were observed. Phyto-assessment showed that maize seedlings bio-accumulated heavy metals in polluted soils, which made their survival rate marginal relative to those grown in uncontaminated soils. Soil amendment with compost manure significantly (P<0.05) improved soil properties and maize yield variables. Ecological risk factor (HQ>1) of heavy metals (for example; Zn, Cu, Mn) was high for maize cultivation. Paradigm approach emphasizing sustainable biological soil systems management is desired. Particularly, bioremediation of oil polluted soils using organic materials, and siting of mechanic villages several kilometers away from major land uses (residential houses, farm lands, and usable water bodies) are important for protecting the soil resources for agricultural purposes, and to ensuring environmental sanity and sustainability.

Yield parameter response of maize (Oba Super 2) to earthworm cast and anthill soil under greenhouse condition

“…These important soil parameters promote easy crop root growth and proliferation for enhanced crop production. This accords Ezeaku and Egbemba (2014) report that low Bd is a positive productivity indicator as it helps in easing root penetration, and encourages downward movement of water through old root channels. Similarly, the burrow channels created by the activities of earthworms and termites increase soil depth and regulate water flow into the soil.…”

“…The vegetation belongs to the semitropical rainforest type and complemented by typical grassy vegetation (Ezeaku and Egbemba, 2014).…”

PHYTOREMEDIATION OF HYDROCARBON-CONTAMINATED SOILS USING JARAK KEPYAR (Ricinus communis L) AND COMPOST

“…Petroleum waste is generated from oil and gas businesses or activities or other activities such as a workshop (Ezeaku & Egbemba, 2014 (Kiran & Prasad, 2017;Wiszniewska et al, 2016).…”

“…Phytoremediation techniques of hydrocarbon contaminated soils have been extensively examined, as conducted by Furini et al (2015), Hunt et al (2019), Ndimele (2010), Cristaldi et al (2017), and Wiszniewska et al (2016). (Ezeaku & Egbemba, 2014).…”

Rheological and physical properties of wormcast and termite mound soils in Nsukka subtropical area

“…Average minimum and maximum temperature is 22 and 30°C, respectively. The relative humidity is rarely below 60% (Ezeaku and Egbemba, 2014). The geomorphology of the study areas is of the highlands stretching through the undulating hills to plain lands.…”