From flowering to milk ripe stage,it has descend trend,only 93zhong6 has ascend trend ,The results also showed that its leaf function period lasted longer,it was beneficial for kernel filling.

• 叶面积系数从开花到乳熟都呈下降趋势 ,只有 93中 6呈上升趋势 ,豫麦2 1号、豫麦 4 9号、豫麦 18号间无差异。