【作者】 高蓓； 栗柯； 李艳丽；

【Author】 GaoBei (Nanjing University of information Science and Techology, Nanjing 210044, China) liKe , LI yan-li (Shannxi Meteorological Institute, xi’an 710015, China)

【机构】 南京信息工程大学； 陕西省气象科研所；

【摘要】 采用相关分析、正交多项式及积分回归等方法,对陕西1971～2003年夏玉米的单产与气象因子的关系进行了分析。得出:陕西夏玉米的气象波动指数为0.167,占夏玉米产量波动的73.1%;气象产量存在着约5年的周期性波动;6月中、下旬降水量、7月下旬气温、8月中旬降水量和9月日照时数是影响陕西夏玉米产量的关键气象因子。更多还原

【Abstract】 Using Related analysis, Orthognal Polynomials Integral regression and other statistical methods are adopted to analyze the correlation between the summer maize yield and many meteorological element of 1971～2003. The result indicate that: the climatic motion index of the summer maize is 0.167, has 73.1% of the summer maize yield motion; The climatic yield has about 5 years of periodic motion; Precipitation of the last twenty days In June, temperature of the last ten days of July, Precipitation of the middle ten days in August; Sunshines in September play an important role for the summer maize yield in Shaanxi.更多还原