摘要
以国家宁南旱农试区为研究对象 ,运用相关分析等方法对其 30年 (196 6～ 1987,1993～2 0 0 0 )主要作物产量的统计特征及其与各时段降水的关系进行了定量分析。结果表明 :该区粮食产量主要受 5～ 6月降水影响 ,与全年降水相关不密切。因此 ,以 5～ 6月降水为标准划分的降水丰歉年景最能代表本区粮食生产的丰歉特征。图 2 ,表 3,参 4。
Based on the national dryfarming experimental farm in South Ningxia,the relations between statistical characteristic of main crops'yield and rainfall of different periods in a year from 1966 to 1987 and 1993to 2000 were quantitaty analysed.The results shows that grain production was mainly affected by rainfall from May to June,and has a lower relationship with that of whole year in researched areas.Therefore,differentiating of rainfall harvest years by rainfall from May to June is the best to embody the characteristic of grain production in the arid areas in South Ningxia.
出处
《农业系统科学与综合研究》
CSCD
北大核心
2002年第3期180-182,共3页
System Sciemces and Comprehensive Studies In Agriculture
基金
国家自然科学基金项目 (3 0 0 70 43 9)
国家"八五"
"九五"旱地农业科技攻关项目 (85 -0 0 7-0 1-0 8
95 -0 0 4-0 4-0 7)部分内容
关键词
降水丰歉年景
粮食生产
宁南旱区
降水特征
划分
rainfall harvest ytars
grain production
the arid areas in South Ningxia
