小麦冠层反射光谱与籽粒蛋白质含量及相关品质指标的定量关系  

Relationship of Grain Protein Content and Relevant Quality Traits to Canopy Reflectance Spectra in Wheat

作　　者：李映雪[1] 朱艳[1] 田永超[1] 尤小涛[1] 周冬琴[1] 曹卫星[1] 

机构地区：[1]南京农业大学/江苏省信息农业高技术研究重点实验室/农业部作物生长调控重点开放实验室,南京210095

出　　处：《中国农业科学》2005年第7期1332-1338,共7页Scientia Agricultura Sinica

基　　金：国家自然科学基金项目(30400278);国家"863"计划项目(2002AA243011);江苏省自然科学基金项目(BK2003079;BK2005212);高校博士点基金项目(20030307017)

摘　　要：研究了不同施氮水平下小麦籽粒蛋白质含量及相关品质性状与冠层反射光谱、植株氮素状况之间的定量关系。结果表明,小麦灌浆期冠层反射光谱可以用来直接预测籽粒蛋白质含量、沉降值和降落值,成熟期冠层反射光谱对籽粒醇溶蛋白和谷蛋白含量的监测具有较高的可靠性;籽粒蛋白质含量与花后14d叶片含氮量的相关性较好,并且花后14d比值指数RVI(1220,710)能准确反演叶片含氮量,进而可以间接地预测籽粒蛋白质含量。据此提出了小麦籽粒蛋白质含量及相关品质指标的两种监测技术途径:基于灌浆期反射光谱的直接预测和基于花后14d(灌浆中期)叶片含氮量的间接估测。Quantitative relationships of grain protein content and relevant quality traits to canopy reflectance spectra and plant nitrogen status in wheat were investigated in the experiments under varied nitrogen conditions. The results showed that grain protein content, sedimentation value and falling number could be predicted by canopy reflectance spectra during filling. Monitoring of gliadin and glutenin contents in grains by canopy reflectance spectra at maturity showed high reliability. There were high correlations between grain protein content and leaf nitrogen content at 14 days after anthesis (mid-filling stage), and the latter could be well estimated by the ratio vegetation index RVI (1220, 710) at this stage. Therefore, the reflectance spectra at mid-filling could be used to monitor grain protein content indirectly. These results suggest two approaches to monitor grain protein content and relative quality traits in wheat: direct prediction based on reflectance spectra during filling and indirect estimation based on leaf nitrogen content at mid-filling stage.

关 键 词：籽粒蛋白质含量 冠层反射光谱 定量关系 品质指标 小麦 叶片含氮量 直接预测 品质性状 施氮水平 氮素状况 蛋白含量 醇溶蛋白 比值指数 技术途径 灌浆期 降落值 沉降值 可靠性 成熟期 相关性 花后 植株 

分 类 号：S512.1[农业科学—作物学] S511