Review of Woodfuel Biomass Production and Utilization in Africa a Desk Study © 2019, United Nations Environment Programme

Total Page:16

File Type:pdf, Size:1020Kb

Review of Woodfuel Biomass Production and Utilization in Africa a Desk Study © 2019, United Nations Environment Programme Review of woodfuel Biomass P Roduction and utilization in afRica A Desk Study Review of Woodfuel Biomass Production and Utilization in Africa A Desk Study © 2019, United Nations Environment Programme This publication may be reproduced in whole or in part and in any form for educational or non-profit purposes without special permission from the copyright holder, provided acknowledgement of the source is made. No use of this publication may be made for resale or for any other commercial purpose whatsoever without prior permission in writing from the United Nations Environment Programme. United Nations Environment Programme PO Box 30552, Nairobi 00100, Kenya Tel: +254 20 7621234 Fax: +254 20 7623943/44 http://www.unep.org For bibliographic and reference purposes this publication should be referred to as: UNEP (2019), “Review of Woodfuel Biomass Production and Utilization in Africa: A Desk Study” United Nations Environment Programme PO Box 30552, Nairobi 00100, Kenya This report was prepared by Environmental Pulse Institute (EPI), USA under contract from UNEP. DISCLAIMER The views expressed in this publication are not necessarily those of the agencies cooperating in this project. The designations employed and the presentations do not imply the expression of any opinion whatsoever on the part of the cooperating agencies concerning the legal status of any country, territory, city, or area of its authorities, or the delineation of its frontiers or boundaries. Mention of a commercial company or product in this report does not imply endorsement by the organisations involved in the production of this Atlas. The use of information from this publication concerning proprietary products for publicity or advertising is not permitted. Trademark names and symbols are used in an editorial fashion with no intention of infringement on trademark or copyright laws. We regret any errors or omissions that may have been unwittingly made. Table of Contents Foreword ...............................................................................................................................................i Acknowledgments ..........................................................................................................................................ii Acronyms .............................................................................................................................................iii Executive Summary ......................................................................................................................................iv Chapter 1 Introduction ................................................ 1 1.1 Biomass Energy: The Context .............................................................................................1 1.2 Biomass—renewable energy from plants and animals ....................................................3 Biomass energy in the global and regional context ..............................................................4 Chapter 2 : Status and Trends in Woodfuel Production and Consumption in Africa .......................... 9 2.1 The State of Woodfuel in Africa................................................................................................9 Overview of Africa’s energy sources ....................................................................................9 Fuel types used for cooking in Africa .................................................................................10 Biomass resources assessment ............................................................................................13 Household energy use ........................................................................................................15 2.2 Drivers of Woodfuel Consumption .........................................................................................17 Population growth ..............................................................................................................17 Increasing urbanization .....................................................................................................17 Income growth ...................................................................................................................18 Education level ...................................................................................................................20 2.3 Production and Consumption Patterns of Fuelwood and Charcoal .......................................21 Production of fuelwood and charcoal ................................................................................21 Traditional and improved methods of charcoal production ..............................................26 2.4 Biomass Fuel at the Nexus.......................................................................................................27 Charcoal-forest nexus .........................................................................................................27 Charcoal-agriculture nexus ................................................................................................27 The gender-energy nexus ...................................................................................................29 Rural-urban energy nexus .................................................................................................29 Chapter 3 : Woody Biomass: Value-Chain Analysis and Impacts .............................................................. 31 3.1 Introduction ............................................................................................................................31 3.2 Steps in a Woodfuel Value Chain ............................................................................................32 Biomass supply ...................................................................................................................32 Production and consumption of fuelwood and charcoal ...................................................32 Transport ...........................................................................................................................32 Distribution and sale ..........................................................................................................32 3.3 Summary of the Fuelwood (Firewood) Value Chain ...............................................................33 3.4 Summary of the Charcoal Value Chain ..................................................................................34 3.5 Impacts of the Woodfuel Value Chain ....................................................................................36 Climate change, biomass energy and forests — the nexus .................................................37 Impacts on forests ...............................................................................................................37 Impacts on health ...............................................................................................................38 Impact on food security .....................................................................................................39 Impacts on livelihoods ........................................................................................................40 Minimizing economic losses and opportunity cost ............................................................40 Chapter 4 : Biomass Energy and Sustainable Development: Policies and Strategies........................... 43 4.1 Biomass Energy and the Sustainable Development Goals .....................................................43 4. 2 Challenges and Opportunities ...............................................................................................45 The Grand Challenge ........................................................................................................45 General recommendations for creating opportunities .......................................................45 4.3 Policies and strategies for increasing production and reducing demand of woodfuels ............47 4.4 Improving the woodfuels Policy Framework ..........................................................................54 Woodfuel in national energy policies .................................................................................54 Biomass in national energy legislation ...............................................................................54 4.5 Regulating the Charcoal Trade ...............................................................................................56 4.6 Women, Youth and Entrepreneurship Development ..............................................................59 Business Model ...................................................................................................................59 4.7 Accelerating the Transition to a Diversified Cooking Fuel Portfolio ......................................60 4.8 Conclusion ...............................................................................................................................61 Bibliography ............................................................................................................................................62 Glossary ............................................................................................................................................65 Annex Selected Country Case Studies .....................................................................................................67 Benin ..................................................................................................................................68
Recommended publications
  • FAOSTAT-Forestry Definitions
    FOREST PRODUCTS DEFINITIONS General terms FAOSTAT - Forestry JOINT FOREST SECTOR QUESTIONNAIRE Item Item Code Definition code coniferous C Coniferous All woods derived from trees classified botanically as Gymnospermae, e.g. Abies spp., Araucaria spp., Cedrus spp., Chamaecyparis spp., Cupressus spp., Larix spp., Picea spp., Pinus spp., Thuja spp., Tsuga spp., etc. These are generally referred to as softwoods. non-coniferous NC Non-Coniferous All woods derived from trees classified botanically as Angiospermae, e.g. Acer spp., Dipterocarpus spp., Entandrophragma spp., Eucalyptus spp., Fagus spp., Populus spp., Quercus spp., Shorea spp., Swietonia spp., Tectona spp., etc. These are generally referred to as broadleaves or hardwoods. tropical NC.T Tropical Tropical timber is defined in the International Tropical Timber Agreement (1994) as follows: “Non-coniferous tropical wood for industrial uses, which grows or is produced in the countries situated between the Tropic of Cancer and the Tropic of Capricorn. The term covers logs, sawnwood, veneer sheets and plywood. Plywood which includes in some measure conifers of tropical origin shall also be covered by the definition.” For the purposes of this questionnaire, tropical sawnwood, veneer sheets and plywood shall also include products produced in non-tropical countries from imported tropical roundwood. Please indicate if statistics provided under "tropical" in this questionnaire may include species or products beyond the scope of this definition. Year Data are requested for the calendar year (January-December) indicated. 2 Transactions FAOSTAT - Forestry JOINT FOREST SECTOR QUESTIONNAIRE Element Element Code Definition code 5516 Production Quantity Removals The volume of all trees, living or dead, that are felled and removed from the forest, other wooded land or other felling sites.
    [Show full text]
  • Quality Wood Chip Fuel Depends on the Size of the Installation in Which It Is to Be Used: Pieter D
    Harvesting / Transportation No. 6 The quality requirements for wood chip Quality wood chip fuel depends on the size of the installation in which it is to be used: Pieter D. Kofman 1 Small boilers (<250 kW) require a high quality wood fuel with a low moisture content (<30%) and a small, even chip with few, if any, Quality wood fuel depends mainly on: oversize or overlong particles. A • moisture content, low level of fungal spores is required. • particle size distribution, Medium boilers (250 kW<X<1 MW) • tree species, are more tolerant of moisture content (30-40%) and can handle a • bulk density, coarser chip than small boilers. • level of dust and fungal spores in the fuel, and Still, the amount of oversize and overlong particles should be • ash content. limited. A low level of fungal spores is required. Good quality wood chip fuel is produced by machines with sharp knives, with the ability to vary the size of chip produced to meet end-user specifications. Other Large boilers (>1 MW) are tolerant machines use hammers or flails to reduce particle size and produce hogfuel, of both moisture content (30-55%) and chip quality. The level of fungal which is unsuitable for use in small installations. Large installations can, spores can be higher because however, also have problems in handling and combusting hogfuel. For forest these installations usually take thinnings and other roundwood, chipping is the preferred option. their combustion air from the chip silo which reduces spore This note deals with wood chips only, even though there are other wood fuels, concentrations in and around the such as hogfuel, sawdust, firewood, peelings from fence posts, etc.
    [Show full text]
  • Wood and Charcoal Anatomy of Eight Charcoal- Producing Wood Species in Central Sudan
    View metadata, citation and similar papers at core.ac.uk brought to you by CORE provided by KhartoumSpace Wood and Charcoal Anatomy of Eight Charcoal- producing Wood Species in Central Sudan By Hiat Mohammedain Mustafa Hagar B.Sc. (Honours-2002) Forestry, Faculty of Natural Resources and Environmental Studies University of Sinnar A Thesis Submitted in Fulfillment of the Requirement for the Degree of Master of Science in Forestry (Wood Science) at University of Khartoum Supervisor Dr. Abdelazim Yassin Abdelgadir Department of Forest Products and Industries Faculty of Forestry April 2010 اﻵﻳﺔ اﻵﻳﺔ ﭧ ﭨ ﮋ ﻬ ے ﮯ ۓ ﮱ ڭ ﯔ ﯕ ﯖ ۇ ﯘ ژ ﺻﺪق اﷲ اﻟﻌﻈﻴﻢ ﺳﻮرة (ﻳﺲ: اﻵﻳﺔ 80) i DEDICATION To the Soul of my Father ii ACKNOWLEDGEMENT Praise and thanks are due to Allah who had given me the power and support till completing this study. I am grateful and indebted to my supervisor Dr. Abdelazim Yassin Abdelgadir for his valuable guidance and advice throughout this study and deep thanks are due to Dr. Abdelatif Altyib and Dr. Ashraf Mohamed Ahmed for their supportive comments that led to a successful completion of the research. I would like to express my gratitude to El fasher University that give me this chance and my Department in the forestry of Environment and Natural Resource. I am greatly to Agriculture Engineer. Ali Alnour for his assistance in the sample collection at Alnoor Forest. Also I am grateful to technician Gamil Alla Gumaa for helping me in slide preparation, I am also very thankful to my friend Entisar Abdelrahman Ali who help me typing this work and finally thanks to my family Mother, brother, sister and all members of my family.
    [Show full text]
  • SHELTON RESEARCH, INC. 1517 Pacheco St
    SHELTON RESEARCH, INC. 1517 Pacheco St. P.O. Box 5235 Santa Fe, NM 87502 505-983-9457 EVALUATim OF LOW-EMISSION WOOD STOVES by I Jay W. Shelton and Larry W. Gay Shelton Research, Inc. P.O. Box 5235 ! 1517 Pacheco Street Santa Fe, New Mexico 87501 [ June 23, 1986 FINAL REPORT I OON1RACT A3-122-32 Prepared for CALIFORNIA AIR RESOURCES BOARD P.O. Box 2815 1102 Q Street Sacramento, California 95812 Shelton Research, Ince Research Report No. 1086 I, TABLE CF CDmN.rS la PAGE 1' 1 LIST Clii' T~S••••••••••••••••••••••••••••• I~ LIST OF FIGURES •••••••••••••••••••••••••••• ii r } 1. SlM'v1ARY AND CINa.,USICNS •••••••••••••••••••• 1 ~- 2. RE~T1rns•••••••••••••••••••••••••••• 3 ! 3. I N'IRmJCTI. rn••••••••••••••••••••••••••••••• 4 4. APPLIANCE AND FUEL SELECTirn••••••••••••••• 5 5. 'IEa-IN"I oo_, JI'IIDAOI. •••.•••••...•.•••••.•••. 14 Test cycles •••••••••••••••••••••••••••••• 14 Installation••••••••••••••••••••••••••••• 16 Stove Q?eration•••••••••••••••••••••••••• 16 Fuel Properties•••••••••••••••••••••••••• 16 Measursnent Methods •••••••••••••••••••••• 18 Data Acquisition and Processing•••••••••• 29 r; 6. RESlJI..,TS. • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • 30 J Introduction••••••••••••••••••••••••••••• 30 Units for Fmissions •••••••••••••••••••••• 30 E:x: tra Tes ts •• ., •• "•••••••••••••••••••••••• 30 Particulate Matter ••••••••••••••••••••••• 31 Oeosote•••••• ., •••••••••••••••••••••••••• 32 P.AII. ••••••••••• o • •••••••••••••••••••••••• 32 l NOx •••••••••• t.10••·········· ............. 32 .Amoonia and cyanide••••••••••••••••••••••
    [Show full text]
  • Activated Carbon, Biochar and Charcoal: Linkages and Synergies Across Pyrogenic Carbon’S Abcs
    water Review Activated Carbon, Biochar and Charcoal: Linkages and Synergies across Pyrogenic Carbon’s ABCs Nikolas Hagemann 1,* ID , Kurt Spokas 2 ID , Hans-Peter Schmidt 3 ID , Ralf Kägi 4, Marc Anton Böhler 5 and Thomas D. Bucheli 1 1 Agroscope, Environmental Analytics, Reckenholzstrasse 191, CH-8046 Zurich, Switzerland; [email protected] 2 United States Department of Agriculture, Agricultural Research Service, Soil and Water Management Unit, St. Paul, MN 55108, USA; [email protected] 3 Ithaka Institute, Ancienne Eglise 9, CH-1974 Arbaz, Switzerland; [email protected] 4 Eawag, Swiss Federal Institute of Aquatic Science and Technology, Department Process Engineering, Überlandstrasse 133, CH-8600 Dübendorf, Switzerland; [email protected] 5 Eawag, Swiss Federal Institute of Aquatic Science and Technology, Application and Development, Department Process Engineering, Überlandstrasse 133, CH-8600 Dübendorf, Switzerland; [email protected] * Correspondence: [email protected]; Tel.: +41-58-462-1074 Received: 11 January 2018; Accepted: 1 February 2018; Published: 9 February 2018 Abstract: Biochar and activated carbon, both carbonaceous pyrogenic materials, are important products for environmental technology and intensively studied for a multitude of purposes. A strict distinction between these materials is not always possible, and also a generally accepted terminology is lacking. However, research on both materials is increasingly overlapping: sorption and remediation are the domain of activated carbon, which nowadays is also addressed by studies on biochar. Thus, awareness of both fields of research and knowledge about the distinction of biochar and activated carbon is necessary for designing novel research on pyrogenic carbonaceous materials. Here, we describe the dividing ranges and common grounds of biochar, activated carbon and other pyrogenic carbonaceous materials such as charcoal based on their history, definition and production technologies.
    [Show full text]
  • Free Download
    The Revolution Transforming Agriculture & Environment Biochar: Ancient Origins, Modern Solution A Biochar Timeline Author Paul Taylor PhD This complete book is available at www.TheBiocharRevolution.com Biochar: Ancient Origins, Modern Solution A Biochar Timeline Author Paul Taylor PhD This complete book is available at www.TheBiocharRevolution.com FIRST EDITION 2010 Copyright 2010 NuLife Publishing All rights reserved. No part of this publication may be reproduced, stored in a retrieval system in any form or by any means, electronic, mechanical, photocopying, recording or otherwise, without the prior written permission of the publisher. National Library of Australia Cataloguing–in–Publishing entry: Taylor, Paul, 1945– The Biochar Revolution: Transforming Agriculture & Environment. 1st ed. ISBN: 978 1 921630 41 5 (pbk.) 1. Ashes as fertilizer. 2. Carbon sequestration. 3. Charcoal. 4. Soil amendments 631.4 Published by NuLife Publishing PO Box 9284 GCMC Qld 9726 Australia Email: [email protected] For further information about orders: Email: [email protected] Website: www.thebiocharrevolution.com ACKNOWLEDGEMENTS I am grateful for the interest, support, patience, and effort expressed consistently— yet in unique ways—by each and every author, as we went though many revisions together. They are listed in the front of the book, with their bios in the back, under contributing authors. I owe special thanks to Hugh McLaughlin and Paul Anderson for their belief, interest, advice and support in the book as a whole. Both read, and offered valuable editing suggestions on, diverse chapters. Hugh reviewed most of the final manuscript. Gary Levi played a crucial role as chief editor and editorial advisor. He edited every chapter numerous times, and stayed with the project as it extended from 5 weeks to 5 months, working generously and meticulously to shape and organize the book.
    [Show full text]
  • Proceedings IUFRO: Evaluation and Planning of Forestry Research
    united States oepartment of Agriculture Proceedings Forest Service Northeastern IUFRO Station NE-GTR-111 Evaluation and Planning 1986 of Forestry Research S6.06 - S6.06.01 Colorado State University Fort Collins, Colorado 80523 July 25-26, 1985 IUFRO PROCEEDINGS EVALUATION AND PLANNING OF FORESTRY RESEARCH S6.06 - S6.06.01 Compiled by Denver P. Burns Colorado State University Fort Collins, Colorado 80523 USA July 25-26, 1985 Sponsored by INTERNATIONAL UNION OF FORESTRY RESEARCH ORGANIZATIONS and NORTHEASTERN FOREST EXPERIMENT STATION, USDA FOREST SERVICE Papers are published in this proceedings in camera-ready form as submitted by the authors. The authors are responsible for the content of their papers. PROGRAM July 25, 1985 Introduction: Denver P. Burns, Director, Northeastern Forest Experiment Station, USDA Forest Service, Broanall, PA SESSION I - RESB.Alial FRONTIERS Moderator: Dr. Eldon Ross Resear·ch Frontiers. W. Franklin Harr·is, Deputy Division Director, Biotic Systems and Resources, National Science Foundation, Washington, D.C. SESSION II - RESBARQI FROIITIBRS FOR FORESTRY Applying Frontier Biotechnologies to Tree Improvement: Opportunities and Limitations. F. Thomas Ledig, Project Leader, Institute of Forest Genetics, Pacific Southwest Forest and Range Experiment Station, USDA For·est Service, Berkeley, CA Biotechnologies - The Potential Role of Somaclonal Variation in Forestry. Darroll D. Skilling and Michael E. Ostry, Principal Plant Pathologists, Nor·th Central Forest Experiment Station, USDA Forest Service, St. Paul, MN Frontiers in Wood Utilization Research in the United States. John R. Erickson, Director·, Forest Products Laboratory, USDA For·est Service, �.adison, WI Fr·ontiers in Handling Wood. C. R. Silversides, Forestry Consultant, Prescott, Ontar·io SESSION III - IDBIITIFIING RBSBARal NEEDS Moderator: Dr.
    [Show full text]
  • Energy Forestry Exemplar Trials Establishment
    Energy Forestry Exemplar Trials Establishment Guidelines Energy Forestry Exemplar Trials Energy Forestry Exemplar Trials Contents Page INTRODUCTION… ....................................................................................2 2. AIMS..................................................................................................2 3. THE TRIAL SITES .................................................................................2 4. GENERAL SITE MANAGEMENT................................................................3 5. SRC and SRF.......................................................................................4 6. RESEARCH, DEVELOPMENT AND MONITORING.........................................4 6.1. Environmental Research..............................................................5 6.2. Silviculture - Short Rotation Forestry (SRF) ...................................7 6.3. Silviculture - Short Rotation Coppice (SRC).................................. 10 6.4. Carbon balance........................................................................ 11 6.5. Regeneration or reinstatement................................................... 11 7. CONCLUSION .................................................................................... 11 BIBLIOGRAPHY ..................................................................................... 12 APPENDICES: Appendix 1: Experiment plans and protocols ............................... 15 - 52 a. Soil sampling and analysis ........................................................... 15
    [Show full text]
  • Bibliography of Wood Distillation
    Bibliography of WoodDistillation T.CL[). Compiled by Gerald A.Walls Arranged by Morrie Craig BibliographY 5 October 1966 For.stProductsResearch FOREST RESEARCHLABORATORY OREGON STATEUNIVERSITY Corvallis PROGRAM AND PURPOSE The Forest Research Laboratoryof the School of Forestry combines a well-equipped laboratory witha staff of forest and wood scientists in program designed to improve the forestresource and promote full uti- lization of forest products. Theextensive research done by the Labora tory is supported by the forest industryand by state and federal funds. The current report results fromstudies in forest products, where wood scientists and technologists,chemists, and engineers are con- cerned with properties, processing,utilization, and marketing of wood and of timber by-products. The PROGRAM of research includes identifying and developing chemicals fromwood, improving pulping of wood and woodresidues, investigating and improving manufacturingtechniques, extending life of wood by treating, developing better methods ofseasoning wood for higher quality and reduced costs, cooperating with forest scientists to determineeffects of growing conditionson wood properties, and evaluating engineering properties ofwood and wood- based materials and structures. The PURPOSE of researchon forest products is to expand markets, create new jobs, and bringmore dollar returns, thus advancing the interests of forestry and forestindustries, by > developing products from residuesand timber now wasted, and > improving treatment and designof present wood products. Table of Contents INTRODUCTION 3 BOOKS 4 ARTICLES AND BULLETINS 5 PATENTS 46 Australia 46 Austria 46 Be1giun 46 Canada 47 Czechoslovakia 47 Denmark 47 France 47 Germany 51 Great Britain 52 India 55 Italy 55 Japan 55 Netherlands 56 Norway 56 Poland 56 Russia 56 Spain 57 Sweden 57 Switzerland 58 United States 59 Bibliography of Wood Distillation INTRODUCTION This bibliography is a revision and extension to1964 of Bibli- ography of Wood Distillation, 1907-1953published in 1955.
    [Show full text]
  • Energy Evaluation of Biochar Obtained from the Pyrolysis of Pine Pellets
    J Therm Anal Calorim (2016) 126:1879–1887 DOI 10.1007/s10973-016-5683-4 Energy evaluation of biochar obtained from the pyrolysis of pine pellets 1 2 3 3 Lidya B. Santos • Maria V. Striebeck • Marisa S. Crespi • Jorge M. V. Capela • 3 1 Clovis A. Ribeiro • Marcelo De Julio Received: 1 June 2015 / Accepted: 3 July 2016 / Published online: 22 July 2016 Ó Akade´miai Kiado´, Budapest, Hungary 2016 Abstract The wood pellets are mainly used in heating compared to pellets in nature, showing a greater amount of environments, commercial and residential, as well as fuel energy per unit, high stability, reduced moisture content for production of thermal and electric energy in industrial and reduced ash content. The kinetic of combustion to plants. Furthermore, the heterogeneity and variable mois- biochar in oxygen-rich atmosphere showed the dependence ture content, combined with the high cost of transport, are between the activation energy and conversion degree, with limiting challenges that must be overcome with new a continuous decrease in the activation energy, character- technologies and new products. In this context, torrefaction istic of complex processes comprised by initial reversible and pyrolysis are attractive alternatives for increasing reaction followed by an irreversible one. energy density and decreasing the moisture content of the samples, based on thermochemical conversion in a non- Keywords Energetic characterization Á Torrefaction Á oxidizing atmosphere. Samples were produced to perform Pyrolysis Á Pine pellets Á Biochar Á Non-isothermal kinetic the energetic characterization of biochar from pine pellet using different heating rates 5–30 °C min-1, different residence temperatures 200, 280 and 570 °C and different Introduction residence time (1 and 0.5 h).
    [Show full text]
  • Wood Preservation Manual Wood Preservation Manual
    Wood preservation manual Wood preservation manual Mechanical Wood Products Branch Forest I ndustries Division FAD Forestry Department The designations employed and the presentation of material in this publication do not imply the expression of any opinion whatsoever on the part of the Food and Agriculture Organization of the United Nations concerning the legal status of any country, territory, city or area or of its authorities, or concerning the delimitation of its frontiers or boundaries. M-34 ISBN 92-5-102470-7 All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, electronic, mechanical, photocopying or otherwise, without the prior permission of the copyright owner. Applications for such permission, with a statement of the purpose and extent of the reproduction, should be addressed to the Director, Publications Division, Food and Agriculture Organization of the United Nations, Via delle Terme di Caracalla, 00100 Rome, Italy. © FAD 1986 - i - CONTENTS Page CHAPTER 1 INTRODUCTION 1 Background and the purpose of the manual CHAPTER 2 WHAT IS PRESERVATION? 2 Importance, benefits and economics of wood preservation, protective measures, protection by specification, protection by design detailing CHAPTER 3 NATURE OF WOOD 13 Wood structure, classes of wood, moisture content and natural durability CHAPTER 4 DECAY HAZARDS 21 Fungi, insects, borers, weathering, fire CHAPTER 5 WOOD PRESERVATIVES 32 Properties, ideal preservative, types of preservatives, tar oils,
    [Show full text]
  • Potassium and Phosphorus Have No Effect on Severity of Charcoal Rot of Soybean
    Can. J. Plant Pathol., 2016 http://dx.doi.org/10.1080/07060661.2016.1168869 Disease control/Moyens de lutte Potassium and phosphorus have no effect on severity of charcoal rot of soybean ALEMU MENGISTU1, XINHUA YIN2, NACER BELLALOUI3, ANGELA M. McCLURE2, DON D. TYLER4 AND KRISHNA N. REDDY5 1Crop Genetics Research Unit, United States Department of Agriculture, Agricultural Research Service (USDA-ARS), Jackson, TN, 38301, USA 2Department of Plant Sciences, University of Tennessee, Jackson, TN, 38301, USA 3Crop Genetics Research Unit, USDA-ARS, Stoneville, MS, 38776, USA 4Department of Biosystems Engineering and Soil Science, University of Tennessee, Jackson, TN, 38301, USA 5Crop Production Systems Research Unit, USDA-ARS, Stoneville, MS, 38776, USA (Accepted 17 March 2016) Abstract: Charcoal rot of soybean [Glycine max (L.) Merr.] caused by Macrophomina phaseolina is a disease of economic significance throughout the world. The effects of potassium (K) and phosphorus (P) fertilizer on disease development are unknown. Therefore, two separate trials were conducted in the field during 2008, 2009 and 2010 at Jackson and Milan, TN, USA to evaluate the effects of K and P on severity of −1 −1 charcoal rot. Rates of K (0, 45, 90, 134 and 179 kg K2Oha ) and P (0, 22, 45, 67 and 90 kg P2O5 ha ) were used, with a sixth rate ranging from 0–22 for P and 0–37 for K equal to the recommended K or P fertilizer application based on annual soil testing. The colony forming units of M. phaseolina in soil indicated no significant response for any P treatments in five of six location-by-year and for K applications in all six location-by-year environments.
    [Show full text]