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

作　　者：刘科[1,2] 陆键[2] 高梦涛 卢碧林 魏中伟[3] 马国辉[3] 田小海[1,2] 张运波[1,2,4] 

机构地区：[1]主要粮食作物产业化湖北省协同创新中心长江大学,湖北荆州434025 [2]长江大学农学院,湖北荆州434025 [3]湖南杂交水稻研究中心/杂交水稻国家重点实验室,湖南长沙410125 [4]湿地生态与农业利用教育部工程研究中心,湖北荆州434025

出　　处：《核农学报》2018年第2期362-369,共8页Journal of Nuclear Agricultural Sciences

基　　金：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)

摘　　要：为探究不同氮肥处理对两系杂交稻叶片光谱特征、叶绿素含量(SPAD)、光能拦截率之间关系的影响,本试验以全两优1号和全两优681杂交稻品种为供试材料,设置N0(0 kg·hm^(-2))、N1(150kg·hm^(-2))和N2(250 kg·hm^(-2))3个氮肥处理,研究不同氮肥施用量下杂交稻群体的光能截获率(IPAR)、SPAD和叶片光谱特性。结果表明,不同氮肥处理下水稻叶片光谱特征差异明显,全两优1号和全两优681的光谱反射率随氮肥施用量的增加在可见光范围内降低,在近红外区域增高。施氮量的增加能够提高叶片SPAD值以及光化学植被指数值(PRI),PRI与IPAR相关系数达到0.64。齐穗期的光谱参数中的差值植被指数(DVI)、垂直植被指数(PVI)与2个杂交稻品种的实际产量均呈极显著正相关,相关系数分别为0.82和0.86。综上,齐穗期水稻群体高光谱指数能够预测水稻群体IPAR以及实际产量,本研究利用高光谱数据反演水稻关键生育期内的氮素营养信息,为氮肥精确化管理,提高氮肥利用率,实现水稻高产高效提供了理论指导。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 

分 类 号：S511[农业科学—作物学]