中国烟草科学2025，Vol.46Issue(5)：28-34,7.DOI:10.13496/j.issn.1007-5119.2025.05.004
烟草大田期叶片形状系数时空动态研究
Spatiotemporal Dynamics of Leaf Shape Coefficient of Tobacco During Field Period
摘要
Abstract
To investigate the temporal and spatial dynamics of the leaf shape coefficient(α value)in field-grown tobacco,this study used Nicotiana tabacum cv.Yunyan 87 as the experimental material.By measuring the leaf length,leaf width,and leaf area under different developmental stages(temporal factor),planting densities,and leaf positions(spatial factors),the α values under various temporal and spatial conditions were calculated to clarify the characteristics and underlying mechanisms of the temporal and spatial dynamics in α values.Results showed that planting density had no significant effect on α values,while its interaction with leaf position exhibited significant effect.The average α values of different densities across leaf position showed a trend of decrease-increase-decrease-increase with the days after transplanting.Over the whole growth period,the α values for each leaf position of Yunyan 87 fluctuated between 0.512 and 0.860.Logistic model fitting results suggested that the inconsistent growth rates of leaf length and width might be the main cause of fluctuations of α values.Therefore,when calculating tobacco leaf area using α values,it is recommended to incorporate the α values corresponding to different developmental stages and leaf positions into the formula to improve the accuracy of leaf area calculation.The α values for different developmental stages and leaf positions obtained in this study,along with the proposed methods,provide a basis for more accurate and convenient leaf area calculations in tobacco production.关键词
烟草/叶片形状系数/叶面积计算/时空动态Key words
tobacco/leaf shape coefficient/leaf area calculation/spatiotemporal dynamics分类
农业科学引用本文复制引用
衣春宇,王晓琳,吴涛,付志伟,石屹,赵敏,孙延国,吴福如,曹政..烟草大田期叶片形状系数时空动态研究[J].中国烟草科学,2025,46(5):28-34,7.基金项目
四川省烟草公司重点科技项目(SCYC202207) （SCYC202207）
中国农业科学院科技创新工程(ASTIP-TRIC03) （ASTIP-TRIC03）
山东省自然科学基金青年基金项目(ZR2020QC109) （ZR2020QC109）
