摘要
根据甘肃省粮食产量资料，得到气候产量序列，并确定其近似服从正态分布后，采用熵值分析、丰歉年型划分、方差及功率谱分析方法，分析得出甘肃省粮食趋势产量变化特征，气候产量的年际波动、丰歉年及周期变化规律，并讨论了夏、秋粮结构调整的问题。
Besed on the data of grain yield in Gansu Province, the characteristics of the trend of yield, interannual change and the periodic pattern of climatic yield were studied by using entropy analysis, differentiation of abundant year and lean year, variance analysis, power spectrum after getting a series of climatic yield and affirming the fitting normal distribution. It was also discussed the problem of compositional adjustment of summer and autumn grain crops in this paper.
出处
《中国农业气象》
CSCD
1998年第5期8-12,共5页
Chinese Journal of Agrometeorology
关键词
粮食产量
年际波动
结构调整
甘肃
Grain yield
Interannual change
Compositional adjustment of grain
