果蔗脱毒苗田间叶绿素荧光和群体冠层结构

Chlorophyll fluorescence characteristics and canopy architecture of virus-free s ugarcane

本试验使用果蔗Badila脱毒健康种苗和普通种苗进行大田生产性能试验,结果表明:使用果蔗脱毒健康种苗的花叶病发病率为0;果蔗脱毒健康种苗PSⅡ的原初光能转换效率、光合量子产额和光化学反应活性均小于普通苗,但差异不大;果蔗脱毒健康种苗在田间大伸长期群体冠层的平均叶倾角、透光系数、辐射透过系数、消光系数和田间叶面积分布状况均优于普通种苗,形成了一个较为合理的群体冠层结构。

Virus-free healthy seed cane and normal seed cane of chewing cane variety Badila were planted in the field to test their production ability. The results were as follows: The incidence of sugarcane mosaic virus disease was zero in virus-fre e healthy seed cane treatment. The Yield, F_v/F_m and F_v/F_ o of PS II in virus-free healthy seed cane treatment were all lower than those in normal seed cane treatment, but the differences were little. The mean leaf angle, penetration coefficient, radiation penetration coefficient, extinction co efficient and leaf distribution of the colony canopy in virus-free healthy seed cane treatment at the elongating stage all showed better than those in normal s eed cane treatment, which formed more reasonable canopy architecture of chewing cane colony.