Effect of Climate Variability on Yams (<i>Dioscorea spp</i>.) Production in Central and Northern Benin  

作　　者：Fiacre Hermann Adifon Gilbert Atindogbé Daouda Orou Bello Ibouraïman Balogoun Ibouraïma Yabi Joseph Dossou Léonard Ahoton Aliou Saïdou Fiacre Hermann Adifon;Gilbert Atindogbé;Daouda Orou Bello;Ibouraïman Balogoun;Ibouraïma Yabi;Joseph Dossou;Léonard Ahoton;Aliou Saïdou(Integrated Soil and Crop Management (ISCM) Unit, Soil Sciences Laboratory, School of Plant Production Sciences and Techniques, Faculty of Agronomic Sciences, University of Abomey-Calavi, Cotonou, Benin;Laboratory of Study and Research in Applied and Biometric Statistics (LERSAB), Faculty of Agronomic Sciences (FSA) of the University of Abomey-Calavi, Cotonou, Benin;Plant Biology Laboratory, School of Plant Production Sciences and Techniques, Faculty of Agronomic Sciences, University of Abomey-Calavi, Cotonou, Benin;Pierre PAGNEY Laboratory “Climate, Water, Ecosystem and Development”, University of Abomey-Calavi, Faculty of Letters, Arts and Human Sciences, Department of Geography and Spatial Planning, Cotonou, Benin;Laboratory of Bioengineering of Food Processes (LABIOPA), Faculty of Agronomic Sciences (FSA), University of Abomey-Calavi, Cotonou, Benin)

机构地区：[1]Integrated Soil and Crop Management (ISCM) Unit, Soil Sciences Laboratory, School of Plant Production Sciences and Techniques, Faculty of Agronomic Sciences, University of Abomey-Calavi, Cotonou, Benin [2]Laboratory of Study and Research in Applied and Biometric Statistics (LERSAB), Faculty of Agronomic Sciences (FSA) of the University of Abomey-Calavi, Cotonou, Benin [3]Plant Biology Laboratory, School of Plant Production Sciences and Techniques, Faculty of Agronomic Sciences, University of Abomey-Calavi, Cotonou, Benin [4]Pierre PAGNEY Laboratory “Climate, Water, Ecosystem and Development”, University of Abomey-Calavi, Faculty of Letters, Arts and Human Sciences, Department of Geography and Spatial Planning, Cotonou, Benin [5]Laboratory of Bioengineering of Food Processes (LABIOPA), Faculty of Agronomic Sciences (FSA), University of Abomey-Calavi, Cotonou, Benin

出　　处：《American Journal of Climate Change》2020年第4期423-440,共18页美国气候变化期刊（英文）

摘　　要：Climate change poses an important constraint to agricultural sector and food security in tropical African countries dominated by rain-fed agriculture. This research focuses on the effects of climate variability on yam production in central and northern Benin. Daily climate data such as temperatures, precipitation, potential evapotranspiration, relative humidity and insolation from 1981 to 2016 were collected at the direction of METEO-Benin. A survey was then conducted with 351 producers to collect their perceptions of the effect of climate variability on the yams production. Descriptive statistics, principal component analysis (PCA) followed by trend analyses, Lamb index calculations and the agro-climatic stress index were carried out. The distribution of rain during the yam cycle (91.5% of those surveyed), the ambient temperature (84.9%), insolation (83.5%), the amount of rainwater that fell during the rainy season (82.2%) and the harmattan (53.3%) are perceived by sociolinguistic groups as climatic factors affecting the growth, the tuberization and yield of yams according to the producers. The results indicate an upward trend in temperature over the period 2001 to 2016 in the transition zone (28.4<span style="white-space:nowrap;">°</span>C) and in the Northeast (27.76<span style="white-space:nowrap;">°</span>C) and over the period from 2001 to 2011 in the North-West of Benin (27.71<span style="white-space:nowrap;">°</span>C), where the average annual temperature during these periods is higher than normal (27.82<span style="white-space:nowrap;">°</span>C in the center, 27.44<span style="white-space:nowrap;">°</span>C in the Northeast and 27.42<span style="white-space:nowrap;">°</span>C to the northwest). This research also shows an instability of the rains with a regular decrease in the rainfall in the Centre and the North-East of the country. The agro-climatic stress index (ISA) and above all the annual rainfall constitute the main climatic factors which determine the yield of yam in the various growing aClimate change poses an important constraint to agricultural sector and food security in tropical African countries dominated by rain-fed agriculture. This research focuses on the effects of climate variability on yam production in central and northern Benin. Daily climate data such as temperatures, precipitation, potential evapotranspiration, relative humidity and insolation from 1981 to 2016 were collected at the direction of METEO-Benin. A survey was then conducted with 351 producers to collect their perceptions of the effect of climate variability on the yams production. Descriptive statistics, principal component analysis (PCA) followed by trend analyses, Lamb index calculations and the agro-climatic stress index were carried out. The distribution of rain during the yam cycle (91.5% of those surveyed), the ambient temperature (84.9%), insolation (83.5%), the amount of rainwater that fell during the rainy season (82.2%) and the harmattan (53.3%) are perceived by sociolinguistic groups as climatic factors affecting the growth, the tuberization and yield of yams according to the producers. The results indicate an upward trend in temperature over the period 2001 to 2016 in the transition zone (28.4<span style="white-space:nowrap;">°</span>C) and in the Northeast (27.76<span style="white-space:nowrap;">°</span>C) and over the period from 2001 to 2011 in the North-West of Benin (27.71<span style="white-space:nowrap;">°</span>C), where the average annual temperature during these periods is higher than normal (27.82<span style="white-space:nowrap;">°</span>C in the center, 27.44<span style="white-space:nowrap;">°</span>C in the Northeast and 27.42<span style="white-space:nowrap;">°</span>C to the northwest). This research also shows an instability of the rains with a regular decrease in the rainfall in the Centre and the North-East of the country. The agro-climatic stress index (ISA) and above all the annual rainfall constitute the main climatic factors which determine the yield of yam in the various growing a

关 键 词：YAM Climate Variability Yield Food Security BENIN 

分 类 号：F42[经济管理—产业经济]