INCUBATION STUDIES OF BIOCHAR AND MANURE TO MITIGATE CARBON DIOXIDE RELEASE AND NITROGEN DEFICIENCY IN SEMI-ARID SOILS

Persistent Link:
http://hdl.handle.net/10150/326281
Title:
INCUBATION STUDIES OF BIOCHAR AND MANURE TO MITIGATE CARBON DIOXIDE RELEASE AND NITROGEN DEFICIENCY IN SEMI-ARID SOILS
Author:
Yamafuji, Kazumasa
Issue Date:
2014
Publisher:
The University of Arizona.
Rights:
Copyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.
Embargo:
Release after 8.12.2016
Abstract:
Biochar (BC), produced through pyrolysis of organic residues, is increasingly being used as a beneficial soil amendment. We studied the effects of BC and animal manure additions on carbon dioxide (CO2) release and nitrogen (N) dynamics in three semi-arid climate soils. The objective of this study was to understand how BC application modifies soil nitrogen dynamics and moderate the effects of manure application in semi-arid agricultural systems on different textured soils: the loamy sand (LS) soil, the silty loam (SL) soil, and the clay loam (CL) soil. We found the positive interaction of BC and manure with BC suppressing CO2 emissions in manure amended soils. BC increased nitrogen mineralization in manure-amended soils towards the end of the incubation period 28 days. No significant N immobilization was observed in unamended soils. BC and manure soil additions reduced N deficiencies in all three soils. A second study focused on measuring carbon dioxide emissions from biochar-amended alkaline semi-arid soil. The objective of this study was to test if acidified and non-acidified BC released the same amount of CO2. The results showed that the soil samples amended with acidified BC released more CO2 than those amended with untreated BC with high alkalinity. It is postulated that untreated BC could absorb CO2; whereas, acidified BC with no alkalinity could not. The LS soil amended with BC released less CO2 than LS soil control perhaps due to the soil microbial activity inhibitory effects of the BC’s residual water soluble polynuclear aromatic hydrocarbons. Thus, the interaction with BC and steer manure application could suppress the release of CO2.
Type:
text; Electronic Thesis
Degree Name:
MS
Degree Level:
masters
Degree Program:
Soil, Water and Environmental Science
Degree Grantor:
University of Arizona
Advisor:
Rasmussen, Craig
Committee Chair:
Rasmussen, Craig

Full metadata record

DC FieldValue Language
dc.language.isoen_USen
dc.titleINCUBATION STUDIES OF BIOCHAR AND MANURE TO MITIGATE CARBON DIOXIDE RELEASE AND NITROGEN DEFICIENCY IN SEMI-ARID SOILSen_US
dc.creatorYamafuji, Kazumasaen_US
dc.contributor.authorYamafuji, Kazumasaen_US
dc.date.issued2014-
dc.publisherThe University of Arizona.en_US
dc.rightsCopyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.en_US
dc.description.releaseRelease after 8.12.2016en_US
dc.description.abstractBiochar (BC), produced through pyrolysis of organic residues, is increasingly being used as a beneficial soil amendment. We studied the effects of BC and animal manure additions on carbon dioxide (CO2) release and nitrogen (N) dynamics in three semi-arid climate soils. The objective of this study was to understand how BC application modifies soil nitrogen dynamics and moderate the effects of manure application in semi-arid agricultural systems on different textured soils: the loamy sand (LS) soil, the silty loam (SL) soil, and the clay loam (CL) soil. We found the positive interaction of BC and manure with BC suppressing CO2 emissions in manure amended soils. BC increased nitrogen mineralization in manure-amended soils towards the end of the incubation period 28 days. No significant N immobilization was observed in unamended soils. BC and manure soil additions reduced N deficiencies in all three soils. A second study focused on measuring carbon dioxide emissions from biochar-amended alkaline semi-arid soil. The objective of this study was to test if acidified and non-acidified BC released the same amount of CO2. The results showed that the soil samples amended with acidified BC released more CO2 than those amended with untreated BC with high alkalinity. It is postulated that untreated BC could absorb CO2; whereas, acidified BC with no alkalinity could not. The LS soil amended with BC released less CO2 than LS soil control perhaps due to the soil microbial activity inhibitory effects of the BC’s residual water soluble polynuclear aromatic hydrocarbons. Thus, the interaction with BC and steer manure application could suppress the release of CO2.en_US
dc.typetexten
dc.typeElectronic Thesisen
thesis.degree.nameMSen_US
thesis.degree.levelmastersen_US
thesis.degree.disciplineSoil, Water and Environmental Scienceen_US
thesis.degree.grantorUniversity of Arizonaen_US
dc.contributor.advisorRasmussen, Craigen_US
dc.contributor.chairRasmussen, Craigen_US
dc.contributor.committeememberArtiola, Janicken_US
dc.contributor.committeememberRasmussen, Craigen_US
dc.contributor.committeememberWalworth, Jamesen_US
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