论文部分内容阅读
研究作物产量与自然环境因素关系时，常常要考虑作物不同生育阶段受自然条件的影响，故常将作物整个生育期等分为若干阶段，将每一生物时段的某一气候因子当作一个自变量。如果作物的全生育期较长，而研究的精度要求较高即每一生物阶段较短，则所划分时段即自变量数目可能远大
When studying the relationship between crop yield and natural environment factors, it is often necessary to consider the natural conditions at different stages of crop growth. Therefore, the whole crop growth period is often divided into several stages. A certain climatic factor in each biological period is taken as an independent variable . If the crop’s full growth period is long and the precision of the study is high, ie each biological stage is short, the number of independent variables that may be divided