Science Target Conference Systems, Ajman 4th International Environment Conference 2016

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EFFECT OF NUTRIENT-RICH ALTERNATIVES ON QUALITY OF COMPOST MADE FROM ORGANIC WASTES FOR HEALTH PROTECTION AND FOOD SECURITY
Taiwo Babatunde Hammed

Last modified: 2015-10-10

Abstract


Globally, chemical fertilizers cause serious environmental pollution and health hazards. Studies have shown that compost, is not popular among farmers because of its low quality and bulkiness. Improving compost quality is a challenge and supplementing it with natural fortifiers may be safer than opting for chemical fertilizers. The study design was experimental, comprising compost preparation, formulation with natural fortifiers, farm plot experiments and laboratory analyses. Nutrient enriched compost (NEC) comprised: Plant-Based (PB): cotton and neem seeds, Animal-Based (AB): cow blood and bone, Rock-Based (RB): phosphate rock and human hair, Organic-mixture (OM- mixture of PB, AB and RB), Synthetic/ Chemical (SC): urea and single super-phosphate while ordinary compost was used as control. The plot experiment was randomised complete block design with three replicates. The main plots comprised three crops- maize (cereal), soybean (legume) and yam (tuber) while five different OFFs at three rates of applications- 2.0 tons, 2.5 tons and 3.0 tons per hectare and control formed subplots. Formulation characteristics [organic-carbon, Total Kjedhal Nitrogen (TKN), phosphorus and potassium] were determined. Germination index method was used to assess phytotoxicity of OFFs. Effects of OFFs on Agronomic Parameters (APs) [Number of Leaves (NL), Plant Height (PH), Stem Girth (SG), Leaf Area (LA) and crop yield] were assessed in plot experiments. The control had significantly higher phosphorus and potassium, and lower TKN than any of the formulations. Nutrient-rich materials sourced from animal, plant and rock changed the chemical composition of compost and yielded better agronomic performances than the synthetic fertilizer.