Chinese Journal of Rice Science

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Estimating Pigment Contents in Leaves and Panicles of Rice after Milky Ripening by Hyperspectral Vegetation Indices

CHEN Wei-jun , ZHOU Qi-fa , HUANG Jing-feng   

  • Received:1900-01-01 Revised:1900-01-01 Online:2006-07-10 Published:2006-07-10

用高光谱植被指数估算水稻乳熟后叶片和穗的色素含量

陈维君1;周启发1 ;黄敬峰2   

  1. 1浙江大学 生命科学学院/植物生理与生物化学国家重点实验室, 浙江 杭州 310058; 2浙江大学 农业遥感与信息技术应用研究所, 浙江 杭州 310029

Abstract: A field experiment was carried out to investigate the relationships between the hyperspectral reflectance and pigment(chlorophyll a,b and carotenoids) contents in flag leaf and panicle of two rice cultivars under three nitrogen levels from milky to harvest.Eleven vegetation indices were correlated with the pigment contents in flag leaves and panicles.As a result,the mSR705 and mND705indices were significantly related to the chlorophyll contents,with R2=0.9319(n=48) for leaves and R2=0.9488(n=48) for panicles,respectively.Photochemical reflectance index(PRI) was negatively significantly correlated with the Car/Chl ratio in both flag leaves and panicles(R2=0.7745,n=48),indicating that PRI could be used to predict Car/Chl across different vegetation structures.R760/R500 was also significantly(P=0.05) correlated with Car/Chl in leaves,and carotenoids contents in panicles.It was suggested that mSR705,mND705 and PRI could be used to estimate pigment contents in leaves or panicles of rice,and applied as spectral parameters in rice maturation monitoring.

Key words: rice, vegetation indices, chlorophyll content, carotenoid content, maturation

摘要: 分析测定了大田条件下2个水稻品种在3个氮素水平下的剑叶和穗从乳熟期至收割的光谱反射率(350~2500 nm)及对应剑叶和穗的叶绿素(Chl)、类胡萝卜素(Car)含量,并利用相关分析研究了11个植被指数与剑叶、穗的叶绿素含量之间的关系。mSR705、mND705在试验范围各叶绿素含量水平下,都表现极显著的相关性。mSR705、mND705与叶片、穗叶绿素含量进行线性回归,两者拟合R2分别为0.9319和0.9488(n=48)。植被指数与类胡萝卜素、Car/Chl间的相关性分析表明,光化学反射指数(PRI)与剑叶、穗Car/Chl都有很好的负相关(R2=0.7745,n=48), 可以用来预测不同植被结构的Car/Chl;R760/R500与剑叶Car/Chl和穗Car含量也具有较好的相关性。结果表明,mSR705、mND705和PRI等指数可用于估算叶片、穗的色素含量,作为水稻成熟度的监测指标。

关键词: 水稻, 植被指数, 叶绿素含量, 类胡萝卜素含量, 成熟度