核农学报2018，Vol.32Issue(2)：362-369,8.DOI:10.11869/j.issn.100-8551.2018.02.0362
施氮量对杂交水稻叶片光谱特征、SPAD值和光能拦截率关系的影响
Effects of Different Nitrogen Treatments on the Relationship Between Flag Leaves Spectral Characteristic and SPAD and IPAR in Hybrid Rice Varieties
摘要
Abstract
In order to study the effects of different nitrogen treatments on the relationship between spectral features of flag leaves and the SPAD,and IPAR in hybrid rice,this experiment was conducted with two-line hybrid rice cultivars,Quanliangyou 1 and Quanliangyou 681 with three application levels of nitrogen fertilizer including N0 (0 kg· hm-2),N1 (150 kg·hm-2) and N2(250 kg· hm-2),respectively.The results showed that there was significant difference in the flag leaves spectral features of the two varieties under different nitrogen treatments.The spectral reflectance of the flag leaves was gradually getting bigger in the visible region and smaller in the near infrared region at full heading stage.The SPAD value,PRI and IPAR of the two varieties significantly increased with the improvement of nitrogen rates,and the correlation index between PRI and IPAR was significant,at 0.64.Additionally,both the spectral index DVI and PVI were positively correlated with grain yield,at 0.82 and 0.86,respectively.Given this situation,these spectral indexes of flag leaves in hybrid rice mentioned in our studies could be used to predict grain yield and IPAR.In this study,the acquisition of reflectance spectra based monitoring of nitrogen nutrition in leaf can be applied to precise nitrogen management,and to improve nitrogen use efficiency,thereby providing theoretical guidance for achieving high yield and efficiency in production.关键词
水稻/光谱特征/光能截获/SPAD/产量Key words
rice/spectral characteristics/IPAR/SPAD/grain yield引用本文复制引用
刘科,陆键,高梦涛,卢碧林,魏中伟,马国辉,田小海,张运波..施氮量对杂交水稻叶片光谱特征、SPAD值和光能拦截率关系的影响[J].核农学报,2018,32(2):362-369,8.基金项目
国家重点研发计划项目(2016YFD0300108),国家大学生创新性实验计划项目(2016099) （2016YFD0300108）
