Active canopy sensing of winter wheat nitrogen status: An evaluation of two sensor systems

被引:107
作者
Cao, Qiang [1 ,2 ]
Miao, Yuxin [1 ]
Feng, Guohui [3 ]
Gao, Xiaowei [1 ]
Li, Fei [4 ]
Liu, Bin [1 ]
Yue, Shanchao [1 ]
Cheng, Shanshan [1 ]
Ustin, Susan L. [5 ]
Khosla, R. [6 ]
机构
[1] China Agr Univ, Coll Resources & Environm Sci, ICASD, Beijing 100193, Peoples R China
[2] Nanjing Agr Univ, Natl Engn & Technol, Ctr Informat Agr, Nanjing 210095, Peoples R China
[3] Qingfeng Farm, Dept Agr, Hulin 158421, Heilongjiang, Peoples R China
[4] Inner Mongolia Agr Univ, Coll Ecol & Environm Sci, Hohhot 010019, Peoples R China
[5] Univ Calif Davis, Ctr Spatial Technol & Remote Sensing CSTARS, Dept Land Air & Water Resources, Davis, CA 95616 USA
[6] Colorado State Univ, Dept Soil & Crop Sci, Ft Collins, CO 80523 USA
关键词
Active crop sensor; Nitrogen status; Nitrogen nutrition index; Precision nitrogen management; Green Seeker; Crop Circle; LEAF-AREA INDEX; HYPERSPECTRAL VEGETATION INDEXES; CHLOROPHYLL CONTENT; NUTRITION INDEX; DILUTION CURVE; USE EFFICIENCY; GROWTH-RATE; PADDY RICE; SATIVA L; N STATUS;
D O I
10.1016/j.compag.2014.08.012
中图分类号
S [农业科学];
学科分类号
09 ;
摘要
Crop canopy sensor based in-season site-specific nitrogen (N) management is a promising approach to precision N management. GreenSeeker sensor has previously been evaluated in North China Plain (NCP) for improving winter wheat (Triticum aestivum L.) N management. The Crop Circle ACS-470 is an active canopy sensor with three user-configurable wavebands. This study identified important vegetation indices that can be calculated from Crop Circle green, red edge and near infrared (NIR) wavebands for estimating winter wheat N status and evaluated their potential improvements over GreenSeeker normalized difference vegetation index (NDVI) and ratio vegetation index (RVI). Six field experiments involving different N rates and varieties were conducted in the Quzhou Experiment Station of the China Agricultural University from 2009 to 2012. The results indicated that best Crop Circle ACS-470 sensor vegetation indices could explain similar amounts of aboveground biomass variability in comparison with GreenSeeker sensor NDVI, but Crop Circle normalized difference red edge/green optimized soil adjusted vegetation index (NDRE/GOSAVI) and red edge chlorophyll index (CIRE) were more sensitive to aboveground biomass (having lower noise equivalent) than GreenSeeker NDVI before and after biomass reached about 5000 kg ha(-1), respectively. The Crop Circle green difference vegetation index (GDVI) (R-2 = 0.60) and chlorophyll index (CIG) (R-2 = 0.89) explained 53% and 7-11% more variability in plant N concentration and uptake than GreenSeeker indices, respectively. The Crop Circle green re-normalized difference vegetation index (GRDVI) (R-2 = 0.78) and modified green soil adjusted vegetation index (MGSAVI) (R-2 = 0.77) performed consistently better than GreenSeeker NDVI (R-2 = 0.47) and RVI (R-2 = 0.44) for estimating N nutrition index (NNI). We conclude that the three band user configurable Crop Circle ACS-470 sensor can improve the estimation of winter wheat N status as compared with two fixed band GreenSeeker sensor. (C) 2014 Elsevier B.V. All rights reserved.
引用
收藏
页码:54 / 67
页数:14
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