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首页> 美国卫生研究院文献>other >Photosynthetic and Canopy Characteristics of Different Varieties at the Early Elongation Stage and Their Relationships with the Cane Yield in Sugarcane
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Photosynthetic and Canopy Characteristics of Different Varieties at the Early Elongation Stage and Their Relationships with the Cane Yield in Sugarcane

机译：甘蔗早期品种不同品种光合和冠层特性及其与甘蔗产量的关系

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摘要

During sugarcane growth, the Early Elongation stage is critical to cane yield formation. In this study, parameters of 17 sugarcane varieties were determined at the Early Elongation stage using CI-301 photosynthesis measuring system and CI-100 digital plant canopy imager. The data analysis showed highly significant differences in leaf area index (LAI), mean foliage inclination angle (MFIA), transmission coefficient for diffused light penetration (TD), transmission coefficient for solar beam radiation penetration (TR), leaf distribution (LD), net photosynthetic rate (PN), transpiration rate (E), and stomatal conductance (GS) among sugarcane varieties. Based on the photosynthetic or canopy parameters, the 17 sugarcane varieties were classified into four categories. Through the factor analysis, nine parameters were represented by three principal factors, of which the cumulative rate of variance contributions reached 85.77%. A regression for sugarcane yield, with relative error of yield fitting less than 0.05, was successfully established: sugarcane yield = −27.19 − 1.69 × PN + 0.17 ×  E + 90.43 × LAI − 408.81 × LD + 0.0015 × NSH + 101.38 ×  D (R 2 = 0.928**). This study helps provide a theoretical basis and technical guidance for the screening of new sugarcane varieties with high net photosynthetic rate and ideal canopy structure.
机译：在甘蔗生长过程中，早期伸长阶段对甘蔗产量形成至关重要。在这项研究中，使用CI-301光合作用测量系统和CI-100数字植物冠层成像仪在伸长的早期阶段确定了17个甘蔗品种的参数。数据分析显示，叶面积指数（LAI），平均叶子倾斜角（MFIA），散射光透射率（TD），太阳光束辐射透射率（TR），叶片分布（LD），甘蔗品种的净光合速率（PN），蒸腾速率（E）和气孔导度（GS）。根据光合或冠层参数，将17个甘蔗品种分为四类。通过因子分析，三个主要因子代表了九个参数，其中累计方差贡献率达到了85.77％。成功建立了甘蔗产量的回归，产量拟合度的相对误差小于0.05：甘蔗产量= −27.19 − 1.69×PN + 0.17×E + 90.43×LAI − 408.81×LD + 0.0015×NSH​​ + 101.38×D（ R 2 = 0.928 **）。该研究为筛选具有较高净光合速率和理想冠层结构的甘蔗新品种提供了理论依据和技术指导。

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