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采用二因素二次饱和Ｄ－最优设计方法对小偃６号抽穗后绿叶面积动态变化进行了研究。结果表明，不同水肥措施对小麦抽穗后绿叶面积参数具有显著的调节作用，如不同处理绿叶持续天数为２７～４０天、绿叶持续期为９～２２天、单茎最大绿叶面积为８２～１０５ｃｍ￣２等；籽粒产量随绿叶持续期的延长而增加，与绿叶持续时间相关性不明显；小麦绿叶面积参数的优劣主要取决于氮肥的多少，底墒的调节作用有限；抽穗后维持较高绿叶面积和作用时间对提高产量具有重要意义。
The dynamic change of green leaf area after heading was studied in Xiaoyan 6 by two-factor secondary saturation D-optimal design method. The results showed that different water and fertilizer measures had a significant regulatory effect on the parameters of green leaf area after heading. For example, the duration of green leaves was 27 ~ 40 days, the duration of green leaves was 9 ~ 22 days, and the maximum green leaf area of single stem was 82 ~ 105cm ~ 2 and so on. The grain yield increased with the duration of green leaves prolonged, but had no significant correlation with the duration of green leaves. The quality of wheat leaf area parameters mainly depends on the amount of nitrogen fertilizer and the limited role of soil moisture. After heading, And the role of time to improve production is of great significance.