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中国农学通报 ›› 2016, Vol. 32 ›› Issue (12): 65-70.doi: 10.11924/j.issn.1000-6850.casb15120055

所属专题: 油料作物 园艺

• 农学 农业基础科学 • 上一篇    下一篇

基于多重分形去趋势移动平均分析的油菜叶片氮素营养诊断建模

苏 乐,邹锐标,王 访   

  1. (湖南农业大学理学院,长沙 410128)
  • 收稿日期:2015-12-09 修回日期:2016-02-21 接受日期:2016-02-25 出版日期:2016-04-27 发布日期:2016-04-27
  • 通讯作者: 邹锐标
  • 基金资助:
    国家自然科学基金“基于角果多重分形的油菜氮素营养诊断建模”(31501227);湖南省教育厅重点项目“基于多重分形理论的油菜氮素营养诊断研究”(15A083);优秀青年项目“作物诊断的叶片图像多重分形方法与建模”(14B087);湖南省重点研发计划项目“基于角果图像多重分形特征的油菜氮素营养诊断建模”(2015JC3098)。

Modeling for Rapeseed’s Leaf Nitrogen Nutrient Diagnosis Based on Multifractal Detrended Moving Average Analysis

Su Le, Zou Ruibiao, Wang Fang   

  1. (College of Science, Hunan Agricultural University, Changsha 410128)
  • Received:2015-12-09 Revised:2016-02-21 Accepted:2016-02-25 Online:2016-04-27 Published:2016-04-27

摘要: 为识别和诊断不同施氮水平下油菜叶片纹理特征,利用多重分形去趋势移动平均分析(MF-DMA),分别计算θ=0,θ=0.5,θ=1下油菜叶片图像的11个全局广义Hurst指数和其他6种相关的多重分形特征参数。利用不同的特征参数组合分别对基部叶片、中部叶片和顶部叶片进行氮素营养诊断识别。结果表明θ=0时诊断效果优于θ=0.5和θ=1;并且在θ=0时,基部叶片和中部叶片诊断效果优于顶部叶片,表明基部和中部叶片对氮素敏感性强于顶部。对3个部位混合的油菜样本进行施氮适中和亏缺两类定性诊断,结果表明支持向量机和随机森林这2种分类方法最佳,最佳识别准确率分别为95.81%和96.63%。说明该模型具有良好的有效性。

关键词: 豇豆, 豇豆, 遗传多样性, 亲缘关系, SRAP, SSR

Abstract: In order to identify and diagnose the texture features of rape leaf under different nitrogen levels, eleven kinds of generalized Hurst indexes and other six kinds of related multifractal characteristic parameters of the rape leaf images were calculated by using multifractal detrended moving average analysis (MF-DMA) with three key position parameters, namely, θ=0, 0.5 and 1, respectively. By applying different combinations of characteristic parameters, the nitrogen nutrition diagnosis and recognition were conducted for the base leaf, central leaf and top leaf, respectively. The results showed that the performance of diagnosis with position parameter of θ=0 was better than that with 0.5 and 1. In addition, the best diagnose accuracy came from the base leaf and the central leaf, which demonstrated that the base leaf and the central leaf were more sensitive to the nitrogen deficiency than the top leaf. By diagnosing the nitrogen deficiency and nitrogen moderation of the three parts of the mixed rape leaf samples, it showed that support vector machines and kernel method (SVMKM) and the random forest were the best two methods to obtain the accuracy, by which the best recognition accuracy rate reached 95.81% and 96.63%, respectively. It indicated that our model possessed good effectiveness.