%0 Journal Article
%T An Evaluation of World Cereals Production in Recent 50 Years from a View of Spatial-Temporal Patterns and Regional Differences<br>1961年至2007年全球粮食生产的时空演变特征与地域格局
%A ZHAO Xi
%A FENG Zhiming
%A YANG Yanzhao
%A <br>赵 霞
%A 封志明
%A 杨艳昭
%J 资源科学
%D 2010
%I 
%X Food is one of the basic materials for survival, and Scientists and governments have paid an increasing attention to cereal productions in the world. In order to reveal the evolutional trend and its impacts on world food security, the authors investigated spatial-temporal patterns and regional differences in world cereal productions based on time-series world cereal production data of nearly 50 years from the Food and Agriculture Organization Corporate Statistical Database (FAOSTAT). By a quantitative analysis on cereal production, planting area, yield and per capita production, it was found that there was an obvious regularity in temporal-fluctuation and spatial-concentration in world cereal production. It showed an obvious decreasing trend in production growth since the middle of the 1980s. Particularly in the 1990s, trends in cereal production became more fluctuant. Correlation analysis among cereal production, harvest area and yield suggested that this may have been due to a combined effect of both developed countries and developing countries. The former contributed to the trend by continuously reducing planting areas and the later exerted its impact through slowing down the rate of yield growth. On the other hand, the spatial distribution of cereal productions showed a concentrating pattern. The United States, China, Russia (USSR) and India were frequently the first four major cereal producers during the period 1961-2007, producing almost 50 percent of the world cereals. Canada, Germany, France, Brazil, Indonesia, Bangladesh, Mexico, Myanmar, Argentina, Thailand, Australia, Japan, Italy, Turkey, the United Kingdom and South Africa followed, with their cereal productions usually accounting for around 1 to 3 percent of the world cereals. In order to more reliably reflect distribution characteristics, the authors also examined Pakistan, Vietnam, Nigeria, Iran, Spain, Romania, Poland, Philippines, Hungary and Egypt, which were new producers of ten million tons of cereals. In general, a strong spatial concentration trend of cereal production at regional levels was observed, indicating that Asia and North America were major cereal producers in the world. Europe was ever the second cereal production area. However, affected by a continued reduction in planting area since the 1990s, it has turned to be the third cereal production area over the globe. It was also found that Africa and Australia were of the least importance in world cereal production, but they showed a completely different development trend. Africa increased rapidly at a steady rate while Australia remained an almost fixed proportion at a greatly varying rate. A comparison of three countries showed that a big gap of cereal yield and per capita production among them has become enlarged, which may further intensify the contradiction between supply and demand in the world. It can be concluded the spatial difference in world cereal production is not only one source of stressed regional foo
%K Global cereal production
%K Spatial-temporal pattern
%K Evolution characteristics
%K Regional difference<br>全球
%K 粮食生产
%K 时空格局
%K 演变特征
%K 地域差异
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=B5EDD921F3D863E289B22F36E70174A7007B5F5E43D63598017D41BB67247657&cid=B47B31F6349F979B&jid=9DEEAF23637E6E9539AD99BE6ABAB2B3&aid=F2F90919055862606F68B4E205618642&yid=140ECF96957D60B2&vid=9971A5E270697F23&iid=94C357A881DFC066&sid=3382A18868551611&eid=DE4E739E935BD9A7&journal_id=1007-7588&journal_name=资源科学&referenced_num=0&reference_num=14