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CLC number: S51; S12

On-line Access: 2010-06-02

Received: 2009-10-31

Revision Accepted: 2010-03-18

Crosschecked: 2010-05-11

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Journal of Zhejiang University SCIENCE B 2010 Vol.11 No.6 P.465-470

10.1631/jzus.B0900348


Detection of nitrogen-overfertilized rice plants with leaf positional difference in hyperspectral vegetation index


Author(s):  Qi-fa Zhou, Zhan-yu Liu, Jing-feng Huang

Affiliation(s):  College of Life Sciences, Zhejiang University, Hangzhou 310058, China, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310029, China

Corresponding email(s):   zqifa2002@yahoo.com, hjf@zju.edu.cn

Key Words:  Rice, Nitrogen (N), Overfertilization, Leaf position, Hyperspectral reflectance


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Qi-fa Zhou, Zhan-yu Liu, Jing-feng Huang. Detection of nitrogen-overfertilized rice plants with leaf positional difference in hyperspectral vegetation index[J]. Journal of Zhejiang University Science B, 2010, 11(6): 465-470.

@article{title="Detection of nitrogen-overfertilized rice plants with leaf positional difference in hyperspectral vegetation index",
author="Qi-fa Zhou, Zhan-yu Liu, Jing-feng Huang",
journal="Journal of Zhejiang University Science B",
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number="6",
pages="465-470",
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publisher="Zhejiang University Press & Springer",
doi="10.1631/jzus.B0900348"
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%T Detection of nitrogen-overfertilized rice plants with leaf positional difference in hyperspectral vegetation index
%A Qi-fa Zhou
%A Zhan-yu Liu
%A Jing-feng Huang
%J Journal of Zhejiang University SCIENCE B
%V 11
%N 6
%P 465-470
%@ 1673-1581
%D 2010
%I Zhejiang University Press & Springer
%DOI 10.1631/jzus.B0900348

TY - JOUR
T1 - Detection of nitrogen-overfertilized rice plants with leaf positional difference in hyperspectral vegetation index
A1 - Qi-fa Zhou
A1 - Zhan-yu Liu
A1 - Jing-feng Huang
J0 - Journal of Zhejiang University Science B
VL - 11
IS - 6
SP - 465
EP - 470
%@ 1673-1581
Y1 - 2010
PB - Zhejiang University Press & Springer
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DOI - 10.1631/jzus.B0900348


Abstract: 
The main objective of this work was to compare the applicability of the single leaf (the uppermost leaf L1 and the third uppermost leaf L3) modified simple ratio (mSR705 index) and the leaf positional difference in the vegetation index between L1 and L3 (mSR705L1−mSR705L3) in detecting nitrogen (N)-overfertilized rice plants. A field experiment consisting of three rice genotypes and five N fertilization levels (0, 75, 180, 285, and 390 kg N/ha) was conducted at Xiaoshan, Hangzhou, Zhejiang Province, China in 2008. The hyperspectral reflectance (350–2500 nm) and the chlorophyll concentration (ChlC) of L1 and L3 were measured at different stages. The mSR705L1 and mSR705L3 indices appeared not to be highly sensitive to the N rates, especially when the N rate was high (above 180 kg N/ha). The mean mSR705L1−mSR705L3 across the genotypes increased significantly (P<0.05) or considerably from 180 to 285 kg N/ha treatment and from 285 to 390 kg N/ha treatment at all the stages. Also, use of the difference (mSR705L1−mSR705L3) greatly reduced the influence of the stages and genotypes in assessing the N status with reflectance data. The results of this study show that the N-overfertilized rice plants can be effectively detected with the leaf positional difference in the mSR705 index.

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