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Evaluation of the chlorophyll meter and GreenSeeker for the assessment of rice nitrogen status

Published online by Cambridge University Press:  01 June 2017

Ke Zhang ,
Xiaokang Ge ,
Xia Liu ,
Zeyu Zhang ,
Yan Liang ,
Yongchao Tian ,
Qiang Cao ,
Weixing Cao ,
Yan Zhu  and
Xiaojun Liu
Ke Zhang
Affiliation:
National Engineering and Technology Center for Information Agriculture, Nanjing Agricultural University, 1 Weigang Road, Nanjing, Jiangsu 210095, P. R. China
Xiaokang Ge
Affiliation:
National Engineering and Technology Center for Information Agriculture, Nanjing Agricultural University, 1 Weigang Road, Nanjing, Jiangsu 210095, P. R. China
Xia Liu
Affiliation:
National Engineering and Technology Center for Information Agriculture, Nanjing Agricultural University, 1 Weigang Road, Nanjing, Jiangsu 210095, P. R. China
Zeyu Zhang
Affiliation:
National Engineering and Technology Center for Information Agriculture, Nanjing Agricultural University, 1 Weigang Road, Nanjing, Jiangsu 210095, P. R. China
Yan Liang
Affiliation:
National Engineering and Technology Center for Information Agriculture, Nanjing Agricultural University, 1 Weigang Road, Nanjing, Jiangsu 210095, P. R. China
Yongchao Tian
Affiliation:
National Engineering and Technology Center for Information Agriculture, Nanjing Agricultural University, 1 Weigang Road, Nanjing, Jiangsu 210095, P. R. China
Qiang Cao
Affiliation:
National Engineering and Technology Center for Information Agriculture, Nanjing Agricultural University, 1 Weigang Road, Nanjing, Jiangsu 210095, P. R. China
Weixing Cao
Affiliation:
National Engineering and Technology Center for Information Agriculture, Nanjing Agricultural University, 1 Weigang Road, Nanjing, Jiangsu 210095, P. R. China
Yan Zhu
Affiliation:
National Engineering and Technology Center for Information Agriculture, Nanjing Agricultural University, 1 Weigang Road, Nanjing, Jiangsu 210095, P. R. China
Xiaojun Liu*
Affiliation:
National Engineering and Technology Center for Information Agriculture, Nanjing Agricultural University, 1 Weigang Road, Nanjing, Jiangsu 210095, P. R. China
*
†E-mail: liuxj@njau.edu.cn
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Abstract

This work was to evaluate the differences of soil and plant analysis development (SPAD) and normalized difference vegetation index (NDVI) readings and their relationship with leaf nitrogen accumulation (LNA). The study explored new indices to diagnose nitrogen (N) status. These indices were obtained by multiplying SPAD readings and leaf area index (LAI). Linear regression relationships between Chlorophyll values and N indicators showed the SPAD readings (Chl: LNA=0.0546×Chl-0.479, R2=0.94***, P<0.001). The projected results suggested that Chl values could play an important role for improving N status diagnosis from stem elongation to heading stages in paddy rice.

Keywords

Leaf Area IndexLeaf nitrogen accumulationNDVI
Type
Precision Nitrogen
Information
Advances in Animal Biosciences , Volume 8 , Special Issue 2: Papers presented at the 11th European Conference on Precision Agriculture (ECPA 2017), John McIntyre Centre, Edinburgh, UK, July 16–20 2017 , July 2017 , pp. 359 - 363
Copyright
© The Animal Consortium 2017 

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