利用数字图像技术进行玉米氮素营养诊断的研究.pdf

玉 米科学2010 ，18(4)：147～149，152 Journal of Maize Sciences 文章编号：1005- 0906(2010)04- 0147- 03 利用数字图像技术进行玉米 氮素营养诊断的研究 1 2 刘 颖 ，李志洪 (1.黑龙江省农业科学院土壤肥料与环境资源研究所，黑龙江省土壤环境与植物营养重点实验室，哈尔滨 150086； 2.吉林农业大学资源与环境学院，长春 130118) 摘 要：通过大田试验设置不同氮肥用量小区，在拔节期前用数码相机拍摄冠层彩色图像，建立数码图像获取 信息数据。同时采集植物样品与土壤样品进行分析，分别测定SPAD、植株全氮含量、茎基部硝酸盐浓度、植株体内硝 酸还原酶活性4 项常规氮素营养诊断指标，分析图像数字化指标如绿光绝对值(G)、绿光标准化值[G/(R+G+B)]、绿光 与图像亮度的比值(G/L)、绿光与红光的比值(G/R)与以上4 项氮素营养指标的相关性，研究利用数字图像技术进行玉 米氮素营养诊断的可行性。 关键词：氮肥；数字图像；营养诊断 中图分类号：S129；S513 文献标识码：A Study on the N Status Diagnosis Through Digital Image Analysis Method 1 2 LIU Ying , LI Zhi- hong (1. Soil and Fertilize and Environment Resources Institute of Heilongjiang Academy of Agricultural Sciences, Soil Environment and Plant Nutrition Key Lab of Heilongjiang Province, Harbin 150086; 2. Faculty of Resources and Environment, Jilin Agricultural University, Changchun 130118, China) Abstract: Setting up experimental district of different N fertilizer levels, taking colorful photos using digital cam- era of hat layer before shooting stage, obtaining information from the digital image. At the same time, collecting the sample of plant and soil, then measuring the SPAD readings, plant content of total N, activity of NR and nitrate con- centration of stalk basilar, analyzing the relativity of the digital index of image and the other 4 indexes. The digital in- dex of image include the greenness intensity G, the ratio of greenness and redness intensity G/R, the ratio of greenness intensity and redness intensity