Nitrogen Status Diagnosis by Using Digital Photography Analysis for Organic Fertilized Maize
文献类型: 外文期刊
作者: Sun Qin-ping 1 ; Li Ji-jin 1 ; Zou Guo-yuan 1 ; Xiang Cheng-cai 1 ; Luo Yi-ming 1 ; Liu Ben-sheng 1 ;
作者机构: 1.Beijing Acad Agr & Forestry Sci, Inst Plant Nutr & Resources, Beijing 100097, Peoples R China
关键词: Digital photography;Redness intensity;Maize;Nitrogen status
期刊名称:SPECTROSCOPY AND SPECTRAL ANALYSIS ( 影响因子:0.589; 五年影响因子:0.504 )
ISSN: 1000-0593
年卷期: 2010 年 30 卷 9 期
页码:
收录情况: SCI
摘要: It need a relative long term for the maize nitrogen status diagnosis with a destroyed samples taking. In the present research, a pot experiment with different organic fertilizer and different fertilizer amount input was conducted to study the possibility of using digital photography analysis technology to monitor the N status of organic fertilized maize at 10 leaves unfold stage. The results showed that the greenness intensity (GI) and redness intensity (RI) from maize canopy image had significant inverse linear correlations with the conventional N diagnosis parameters of SPAD readings, upland biomass and upland N uptake. However the blueness intensity (BI) had no significant correlations with those maize N indexes. The correlation coefficient values (r) were from 0. 40 to 0. 45 for GI, and from 0. 45 to 0. 53 for RI. To sum totally, the visible digital image color analysis method can be used for the organic fertilized maize N diagnosis at 10 leaves unfold stage. The redness intensity was a relatively better index than others for the organic fertilized maize N status diagnosis in this experimental condition.
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