Physical Properties And Maize Production In A Spent Oil-Contaminated Soil Bioremediated With Legumes And Organic Nutrients

Abstract

Information on the use of plant species and organic nutrients to improve the physical properties of oil-contaminated soil, with a view to making it conducive for crop production, is very important. Three legumes (Gliricidia sepium, Leucenae leucocephala and Calapogonium caeruleam) combined or not with poultry manure were tested for their ability to improve the physical properties of a sandy soil, contaminated with 5% (w/w) spent lubricating oil, each for two years, and its effects on the growth and yield of maize in south eastern Nigeria. Aggregate stability (MWD), saturated hydraulic conductivity, and macro-to micro-porosity ratio improved with time in all the treatments over the 5% oil contamination (A 5 ) and control. At 12 and 18 months, the use of Gliricidia sepium with 0.5% (w/w) poultry manure (A 5 +Gl+PM) gave the highest improvement of 58% and 94% in MWD, corresponding to 136% and 187% improvement in saturated hydraulic conductivity, respectively over the A 5 . The A 5 +Gl+PM also enhanced soil aggregate sizes > 0.25 mm by 63.6% and showed a 3-fold positive modification in soil macro-porosity. Positive relationships, significant at 0.01 level of probability, were observed between crusting hazard (R) and soil organic matter (r = 0.814), microporosity (r = 0.686) and saturated hydraulic conductivity (r = 0.787). The A 5 +Le+PM also increased maize growth and grain yield. Gliricidia sepium and Leucenae leucocephala combined with.0.5% (w/w) poultry manure is recommended for follow-up investigation, as it may offer a viable choice for remediation of oil-contaminated soil.

Aggregate stability and sealing risk of solonetz under different land use regimes

“…hidrauličkog konduktiviteta (r=0,787) (Udom et al 2008). Meliorativna uloga đubriva bi trebala da se sastoji u obogaćivanju solonjeca organskom materijom i hranljivim elementima.…”

“…Međutim, većina solonjeca ima ili plitak humusno-akumulativni horizont, ili je potpuno erodiran. Prema rezultatima ispitivanja utvrđene su pozitivne zavisnosti između rizika od stvaranja pokorice (R) i sadržaja organske materije u zemljištu (r=0,814), sadržaja mikropora (r=0,686) i sadržaja zasićenog hidrauličkog konduktiviteta (r=0,787) (Udom et al 2008). Meliorativna uloga đubriva bi trebala da se sastoji u obogaćivanju solonjeca organskom materijom i hranljivim elementima.…”

Effect of Crude Oil Polluted Soil on the Reproductive Growth of Plantain (Musa paradisiaca L.)

“…Investigations on the effect of crude oil and its derivatives on plants showed a reduction in the growth and yield of Zea mays and Triticum aestivum [6,7,8,9]. Reports also indicate significant reduction of plants vegetative and reproductive growth and or complete mortality of some other plant species [10]. According to AI-Jawhari et al [11], soils polluted by crude oil resulted into inhibition of seed germination, growth, and productivity of soybean and maize.…”

Assessment of Soil-Water Infiltration Dynamics of Waste Oil Polluted Terrestrial Habitat Under Macrophytic Remediation: A Window for Automobile Workshops

“…In general, oil contamination reduces the permeability, strength and Atterberg limits by increasing oil contamination in clay soil, (Mashalah et al, 2007;Ashraf, 2011). Marked changes in the physical, chemical and biological properties of soils contaminated with lubricant oil have been documented in light of air and water displacement leading to anaerobic condition (Atlas, 1977); microbiological properties (Ekundayo et al, (1989), increased bulk density, decreased water holding capacity and aeration propensity, decreased porosity and hydraulic conductivity (Udom et al, 2008;Kayode, et al, 2009;Inwite and Alu, 2015;Edwin-Wosu and Nkang 2017a).…”