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Title: Nvestigation of Environmental and Economic Benefits of Bioslurry From Coffee Husk Relative to Chemical Fertilizer
???metadata.dc.contributor.*???: Berhanu Assefa (PhD)
Zerihun Abate (Mr.)
Takele, Uma
Keywords: soil;organic carbon;yield;carbon pool;soil fertility
Issue Date: Jun-2014
Publisher: AAU
Abstract: Agriculture dominates the Ethiopian economy. It is the major supplier of raw materials to food processing, beverage and textile industries. Application of fertilizer is one of the major interventions made by the government to increase the productivity of the sector. The government focuses on productivity improvement of smallholder agriculture through diffusion of fertilizers and improved seeds. However, the price of chemical fertilizer is increasing from time to time which results in shortage of the supply and unaffordable to smallholder farmers. The objective of the study was to (i) to see the effect of bioslurry from coffee husk on the macro nutrients of the soil (ii) to assess the influence of bioslurry from coffee husk on soil organic carbon content (iii) to compare the effect of bio slurry on yield and yield components of the test crop (iv) To compare the economic benefit of bio slurry application from yield perspective. In order to achieve the stated objectives, a pot study was conducted under greenhouse condition. Seven treatments were designed with combined and sole application rates of bioslurry and urea to 5 kg soil pot-1 using wheat as a test crop. The results of the study revealed that combined and sole application of the bioslurry with chemical fertilizer positively increased the yield, yield component of the test crop and organic carbon soil. The conjugate application of bioslurry with chemical fertilizer at (3.1m3 bioslurry +62 kg urea) ha-1 gave the highest yield (4368.2 kgha-1) and highest spike length was also recorded with this treatment. The high application rate of bioslurry at (6.2m3 ha-1) increased the soil organic carbon content over 100% compared to the control without any amendment. The simple economic calculation based on economic efficiency indicated that the combined application of bioslurry with chemical fertilizer at (3.1 m3 +62 kg urea) ha-1 gave a net benefit of 23, 460.8 ETB. The study showed that the appropriate utilization of bioslurry as soil amendment not only increases soil fertility but also plays a great role in alleviation of climate change through increment of soil organic carbon which in turn serves as a carbon pool of planet earth.
Appears in Collections:Enviromental Engineering

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