摘要
通过对松原市粮食产量资料分析得出,玉米和水稻分别占总粮食产量的74.13%和12.43%,其他作物占产量的13.44%。采用等权重不同间距滑动平均得到的气象产量序列,间接反映出了因气象条件优劣造成的丰歉年景。由18个因子筛选组建的玉米产量预报方程验证结果,平均绝对误差仅0.08,平均相对误差<1%。另外,单独组建的其他粮产预报方程,复相关系数均通过0.001信度水准检验。
As indicated by the analysis results on the grain yield data of Songyuan City,maize and rice yield accounted respectively for 74.13% and 12.43% of total grain yield,while other crops accounted for 13.44%.Meteorological yield series was obtained by equal weight moving average,which reflected the good and bad harvest years influenced by meteorological conditions.The mean absolute error and the relative error between the actual yield and predicted yield by prediction equation of maize yield comprising 18 meteorological factors were only 8% and less than 1% respectively.In addition,the multiple correlation coefficient of all other prediction equations constructed independently all passed the reliability test at 0.001 level.
出处
《安徽农业科学》
CAS
北大核心
2011年第10期6227-6229,共3页
Journal of Anhui Agricultural Sciences
关键词
粮食产量现状
粮食产量预报
逐步回归数学方法
Food production status
Food production forecasting
Stepwise regression mathematical method
