| 摘要: |
| 利用HSI 颜色模型研究大田条件下不同施氮处理冬小麦群体数字图像的颜色特征,分析其与叶绿素含量、产量以及吸氮量之间的关系。结果表明:在孕穗至灌浆期前冬小麦群体的色调值H与叶片叶绿素含量(SPAD)存在显著的相关关系;从冬小麦群体色调值H的动态变化看,当生育前期监测到H由峰值开始下降时,可判断进入抽穗期,而生育后期H出现迅速下降时则表明冬小麦群体开始进入灌浆成熟期,数字图像的颜色特征能够反映冬小麦的生育进程;孕穗-开花期间H可以较好的反映作物产量,并建立了H值与冬小麦地上部生物量、籽粒产量之间的线性方程。 |
| 关键词: 冬小麦 图像处理 HSI模型 氮素 |
| DOI：10.11841/j.issn.1007-4333.2010.02.015 |
| 投稿时间：2009-11-02 |
| 基金项目:国家"863"计划项目(2006AAl02272); 公益性行业(农业)科研专项(200803028,200903003)第一作者:文新亚,讲师,主要从事农业信息技术研究,E-mail:wxya@sohu.com通讯作者:陈阜,教授,主要从事宏观农业及作物生态学研究,E-mail:chenfu@cau.edu.cn |
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| Analysis of color characteristics for winter wheat under different N fertilizations based on digital image processing |
|
WEN Xin-ya1, SONG Zhen-wei2, KONG Fan-lei1, ZHANG Zhi-peng1, CHEN Fu1
|
| (1.College of Agriculture and Biotechnology,China Agricultural University, Beijing 100193, China;2.Institute of Crop Science, Chinese Academy of Agricultural Sciences, Beijing 100081, China) |
| Abstract: |
| In this paper, the digital image color characteristics of winter wheat for different nitrogen fertilization treatments under field conditions was investigated. The Hue values (H) in different growth-stages of winter wheat were calculated using the HSI model. The relationship between H values and its chlorophyll content (SPAD) and that between the yield of winter wheat and nitrogen absorption were analyzed. The results show that H values and the chlorophyll content of winter wheat in leaves (SPAD) unfold the significant correlativity during the booting to grain-filling stage; according to the population dynamics of the H value for winter wheat, the decline of the green peak H value indicate the beginning of the booting stage and the other rapidly decline of the H value in the latter growth of winter wheat show the beginning of the filling-maturity stage; and the H value measured in booting and flowering stage can reflect the yield of winter wheat and the regression equations between H value and total above-biomass yield and grain yield are established respectively. |
| Key words: winter wheat image processing HSI model nitrogen |
