CLC number: S51; S12
On-line Access: 2010-06-02
Received: 2009-10-31
Revision Accepted: 2010-03-18
Crosschecked: 2010-05-11
Cited: 6
Clicked: 5673
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",
volume="11",
number="6",
pages="465-470",
year="2010",
publisher="Zhejiang University Press & Springer",
doi="10.1631/jzus.B0900348"
}
%0 Journal Article
%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
ER -
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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