摘要
分析１９８１～１９９５年间哲里木盟主要作物产量波动及其与影响因素的关系表明，粮豆总产和单产均在波动中有较大的提高，总产增幅趋势大于单产，单产年际波动大于总产，各种作物单产的波动受气候因素的影响均大于技术水平，气候因素中以温度影响最大。
This study analyses the total yield and yield per mu of five main crops and the effects of climate(precipitation、temperature and total hours of sunlight)on them.The general trend,since 1981,is that both the total yield and yield per mu are increasing,moreover,the rate of increase is greater for the total yield than for the yield per mu.The total yield,however,varies more by the yield per mu.The total yield of maize and sorghum varies more by the yield per mu than by the total area planted.In contranst,the total of rice,wheat and soybeans is affected more by the area planted than by the yield per mu.Finally,the climate factors affect the total yield of all five crops more than improvements in husbandry(e.g.,mechanization,fortilizer).
出处
《农业环境与发展》
1997年第4期17-20,共4页
Agro-Environment and Development
关键词
作物产量
气候因素
Fluxation of crop yield Area planted technical level Climatic factors
