%0 Journal Article
%T Diagnosis of N nutrient status of corn using digital image processing technique<br>数字图像技术在夏玉米氮素营养诊断中的应用
%A ZHANG Li-Zhou
%A WANG Dian-Wu
%A ZHANG Yu-Ming
%A CHENG Yi-Song
%A LI Hong-Jun
%A HU Chun-Sheng
%A <br>张立周
%A 王殿武
%A 张玉铭
%A 程一松
%A 李红军
%A 胡春胜
%J 中国生态农业学报
%D 2010
%I 
%X Canopy images of summer corn were taken in the 6-leaf and 10-leaf stages in a field experiment with six N application levels. And the relationships between color parameter indexes of corn canopy images and N application level, leaf SPAD, stem sap nitrate concentration, plant total N content and nitrate N content in 0~90 cm soil were determined. The results show that in the 6-leaf stage, color parameter indexes of B/(R+G+B), G/B, R/B, B/L are significantly linearly correlated with N application level, leaf SPAD, stem sap nitrate concentration, plant total N content and nitrate N content in 0~90 cm soil (P<0.01). And B/(R+G+B) presents most significant correlation, and B/L is next to it. In 10-leaf stage, the correlations are not so significant as those in 6-leaf stage. The results suggest that it is feasible to use digital image processing technique to diagnose N nutrient statues of summer corn. The 6-leaf stage is crucial period with B/(R+G+B) as the index for the N nitrogen diagnosis using digital image processing technique.
%K Summer corn
%K Canopy image
%K Color parameter
%K Digital image processing technique
%K Nitrogen status diagnosis<br>夏玉米
%K 冠层图像
%K 色彩参数
%K 数字图像技术
%K 氮素营养诊断
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=03F54A49DE00578AA0E5DDF5BC021AA7&cid=1A8B5357F0EF07B8&jid=AB3ABF502E2E1FF39F0E3B80164C9031&aid=62D687E0D95D676559A6FF7146BE0FBF&yid=140ECF96957D60B2&vid=13553B2D12F347E8&iid=B31275AF3241DB2D&sid=CEEFA682892739FB&eid=D8AEABAD4F3221BE&journal_id=1671-3990&journal_name=中国生态农业学报&referenced_num=3&reference_num=0