keywords: Crude oil, oil palm, pollution, soil enzymes
One problem in crude oil producing regions of the world is pollution of farmlands. As a result, researches are being conducted worldwide to avail a simplified way of reclaiming petroleum polluted soil. In this study the possible ameliorative effect of oil palm leaf, a major waste product of oil palm plantation was evaluated on soil enzyme activities. A laboratory experiment was setup thus: Group 1: 400 g of unpolluted soil, Group 2: 400 g of unpolluted soil + 50 g of oil palm leaf, Group 3: 400 g of unpolluted soil + 100 g of oil palm leaf, Group 4: 400 g of polluted soil, Group 5: 400 g of polluted soil + 50 g of oil palm leaf and Group 6: 400 g of polluted soil + 100 g of oil palm leaf. Soil samples were collected from each treatment once a week for three weeks to determine the activities of alkaline phosphatase, acid phosphatase, urease, dehydrogenase and catalase using standard procedures. The results show that addition of oil palm leaf increased the activities these enzymes relative to the untreated crude oil polluted soil. Thus, oil palm leaf is a candidate for improving soil productive potentials as well as possessing the ability to remediate petroleum impacted farmlands
Achuba FI & Ja-anni MO 2018. Effect of abattoir waste water on metabolic and antioxidant profiles of cowpea seedlings grown in crude oil contaminated soil. Int. J. Recycling of Organic Waste in Agric., 7(1): 59 -66. Achuba FI & Okoh PN 2014. Effect of petroleum products on soil catalase and dehydrogenase activities. Open J. Soil Sci., 4(12): 399-406. Achuba FI & Okunbor G 2015. Abattoir waste water attenuates kerosene toxicity on cowpea (Vigna unguiculuta) seedlings. Biokemistri, 27(4): 159–162. Achuba FI 2015. Effect of petroleum products treatment of soil on succinate dehydogenase and lactate dehydogenase activities in cowpea (Vigna unguiculata) and Maize (Zea mays) seedlings. Am. J. Experimental Agric., 5(5): 498-508. Achuba FI & Peretiemo-Clarke BO 2008. Effect of spent engine oil on soil catalase and dehydrogenase activities. International Agrophysics 22(1): 1-4 Amadi A, Abbey SD & Nma A 1996. Chronic effect of oil spill on soil properties and michroflora of rainforest ecosystem in Nigeria. Water, Air & Soil Poll., 86: 1-11. Atuanya EI 1987. Effects of manure engine oil pollution on physical and chemical properties of the soil. Nig. J. Appl. Sci., 55: 155-176. Casida L, Klein D & Santoro T 1964. Soil dehydrogenase activity. Soil Science, 98: 371-376. Chodak M & Niklińska M 2010. Effect of texture and tree species on microbial properties of mine soils. Applied Soil Ecology, 46: 268-275. Ijah UJJ, Safiyanu H & Abioye OP 2008. Comparative study of biodegradation of crude oil in soil amended with chicken droppings and NPK fertilizer. Science World Journal, 3(2):63-67. Kandeler E & Gerber H 1988. Short-term assay of soil urease activity using colorimetric determination of ammonium. Biology & Fertility of Soils, 6: 68-72. Li H, Zhang Y, Zhang CG & Chen GX 2005. Effect of petroleum-containing wastewater irrigation on bacterial diversities and enzymatic activities in a paddy soil irrigation area. J. Environmental Quality, 34: 1073-1080. Macci C, Doni S, Peruzzi E, Masciandro G, Mennone C & Ceccanti B 2012. Almond tree and organic fertilization for soil quality improvement in southern Italy. J. Environmental Mgt., 95: 215-222. Moeskops B, Buchan D, Sleutel S, Herawaty L, Husen E, Saraswati R, Setyorini D & De Neve S 2010. Soil microbial communities and activities under intensive organic and conventional vegetable farming in west Java, Indonesia. Applied Soil Ecology, 45: 112-120. Okolo JC, Amadi EN & Odu CTI 2005. Effects of soil treatments containing poultry manure on crude oil degradation in a sandy loam soil. Appl. Bio. & Envtal. Res., 3(1): 47-53. Onuh MO, Madukwe DK & Ohia GU 2008a. Effects of poultry manure and cow dung on the physical and chemical properties of crude oil polluted soil. Science World Journal, 3(2): 45 – 50. Onuh MO, Ohazurike NC & Maduekwe DK 2008b . Interaction of crude oil and manure treatments and its effects on the agronomic characteristics of maize (Zea mays L.). Science World Journal, 3(2): 107 – 111. Onuoha CI, Arinze AE & Ataga AE 2003. Evaluation of growth of some fungi in crude oil polluted environment. Global J. Agric. Sci., 2: 1596-290. Osuji LC & Nwoye L 2007. An appraisal of the impact of petroleum hydrocarbons on soil fertility; the Owaza expectation. Afr. J. Agric. Res., 2(7): 318-324.