How big is the potato (Solanum tuberosum L.) yield gap in Sub-Saharan Africa and why? A participatory approach

Open Agriculture

卷:3

Tankou Christopher M.¹  Worku Alemu²  Randrianaivoarivony Jean Marc³  Nasona Bouwe⁴  Schulte-Geldermann Elmar⁵  Harahagazwe Dieudonné⁵  Ochieng Bruce⁵  Mbiri Daniel⁵  Mares Victor⁶  Barreda Carolina⁶  Quiroz Roberto Quiroz⁶  Lung’aho Charles⁷  Byarugaba Arinaitwe Abel⁸  Onditi John⁹  Martinho Carolino¹⁰  Bararyenya Astère¹¹  Kude Danbaba Anthony¹²  Condori Bruno¹³  Mendiburu Felipe de¹⁴ 

[1] Department of Crop Science, University of Dschang, P.O. 222Dschang, Cameroon;

[2] Ethiopian Institute of Agricultural Research (EIAR), P.O. Box 08,Bahir Dar, Ethiopia;

[3] FIFAMANOR,Antsirabe, Madagascar;

[4] Institut National pour l’Etude et la Recherche Agronomiques (INERA),Mulungu, Democratic Republic of Congo;

[5] International Potato Center (CIP), P.O Box 25171-00603,Nairobi, Kenya;

[6] International Potato Center (CIP), P.O. Box 1558,Lima, Peru;

[7] International Potato Center (CIP),Chimoio, Mozambique;

[8] Kachwekano Zonal Agricultural Research and Development Institute (KAZARDI),Kabale, Uganda;

[9] Kenya Agricultural and Livestock Research Organization (KALRO), P. O. Box 338,Tigoni, Kenya;

[10] Mozambique Institute of Agricultural Research (IIAM). P.O. Box 238,Lichinga, Mozambique;

[11] National Agricultural Research Institute (ISABU), P.O Box 795,Gisozi, Burundi;

[12] National Root Crops Research Institute, P.M 04, Vom,Plateau State, Nigeria;

[13] United States Department of Agriculture - Agricultural Research Service (USDA-ARS), Crop Systems and Global Change Lab. 10300 Baltimore Avenue. Beltsville, MD 20705-2350,Maryland, USA;

[14] Universidad Nacional AgrariaLa Molina, Peru;

关键词: yield gap drivers;    participatory modelling;    community of practice;    crop modelling;   

DOI  :  10.1515/opag-2018-0019

来源: DOAJ

【 摘 要 】

According to potato experts from ten Sub-Saharan Africa (SSA) countries working together in a community of practice (CoP) over a 3-years period, potato farmers across SSA can increase their current annual production of 10.8 million metric tons by 140% if they had access to high quality seed along with improved management practices. This paper describes this innovative new methodology tested on potato for the first time, combining modelling and a comprehensive online survey through a CoP. The intent was to overcome the paucity of experimental information required for crop modelling. Researchers, whose data contributed to estimating model parameters, participated in the study using Solanum, a crop model developed by the International Potato Center (CIP). The first finding was that model parameters estimated through participatory modelling using experts’ knowledge were good approximations of those obtained experimentally. The estimated yield gap was 58 Mg ha-1, of which 35 corresponded to a research gap (potential yield minus research yield) and 24 to farmers’ gap (research yield minus farmer’s yield). Over a 6-month period, SurveyMonkey, a Web-based platform was used to assess yield gap drivers. The survey revealed that poor quality seed and bacterial wilt were the main yield gap drivers as perceived by survey respondents.

【 授权许可】

Unknown