冬小麦叶面积动态变化规律及其定量化研究

Dynamic changes and quantification of winter wheat leaf area

摘要: 通过田问试验，对冬小麦叶面积、比叶面积(SLA)及黄叶率(DR)予以描述和定量化，冬小麦冬后比叶面积与相对生育期(RDS)的对数呈线性递减关系，SLA =-21．07×1n(RDS)+19．427，最大和最小比叶面积分别为40m²／kg和19m²／kg。小麦黄叶率在冬后与相对生育期呈抛物线关系，可用下式表示DR=2．142×RDS²-1．8001×RDS+0．6571，这为冬小麦生长模型中的叶面积模拟提供了新的方法和理论依据。

Abstract: Based on field experiments，dynamic changes of leaf area，specific leaf area(SLA)and dry leaf ratio are described and quantified．After wintertime，specific leaf area decreases linearly with logarithmic relative development stage (RDS)and SLA=-21．07×1n(RDS)+19．427．The maximum and minimum specific leaf area is 40 m²／kg and 19m²／kg，respectively．Dry leaf ratio(DR)has parabola relationship with relative development stage and DR=2．142×RDS -1．8001× RDS +0．6571．This study provides a new method and bases for the simulation of winter wheat leaf area in the crop mode1．