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利用CI-100数字植物冠层分析仪和CI-203叶面积分析仪测定了 4个甘蔗品种不同叶位层的冠层参数和相应叶位叶片的形态特征,结果表明:不同基因型不同叶位层间叶片形态、冠层空间结构和冠层辐射特征存在显著差异,不同叶位层叶面积指数、叶簇倾角和叶分布的变化主要由冠层内不同叶位叶片叶宽的变化引起,而不同叶位层消光系数的变化主要与叶簇倾角和叶分布有关;散射光透过系数的变化主要与叶面积指数、叶簇倾角和叶分布有关,直射光透过系数的变化主要与叶分布、叶宽、长宽比有关,光合有效辐射的变化与叶面积指数、叶面积、叶宽、长宽比有关.研究结果同时表明,叶片形态与冠层辐射特征存在显著的典型相关关系. 图 2表 4参 15
The canopy parameters and leaf morphological characteristics of four leaf layers of four sugarcane cultivars were determined by CI-100 digital plant canopy analyzer and CI-203 leaf area analyzer. The results showed that different leaf positions There were significant differences in leaf morphology, canopy spatial structure and canopy radiation characteristics. The changes of leaf area index, leaf cluster angle and leaf distribution at different leaf layers were mainly caused by the changes of leaf width at different leaf positions in canopy, The changes of extinction coefficient at different leaf positions were mainly related to the leaf blade inclination and leaf distribution. The changes of scattering light transmittance were mainly related to leaf area index, leaf cluster angle and leaf distribution. The changes of direct light transmission coefficient were mainly related to leaf distribution , Leaf width and aspect ratio, and the change of photosynthetic active radiation was related to leaf area index, leaf area, leaf width and aspect ratio.The results also showed that there was a significant typical correlation between leaf morphology and canopy radiation characteristics. 2 Table 4 参 15