Hyperspectral Reflectance Inversion Models on Content of N, P, K of Soil in Oasis-Desert Ecotone

doi:10.7522/j.issn.1000-694X.2013.00231

JOURNAL OF DESERT RESEARCH

2014, Vol. 34

Issue (5): 1320-1328 DOI: 10.7522/j.issn.1000-694X.2013.00231

Hyperspectral Reflectance Inversion Models on Content of N, P, K of Soil in Oasis-Desert Ecotone

Luan Fuming^1,2, Xiong Heigang³, Wang Fang^1,2, Zhang Fang⁴

1. Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China;
2. University of Chinese Academy of Sciences, Beijing 100049, China;
3. College of Art and Science, Beijing Union University, Beijing 100083, China;
4. College of Resources and Environment Science, Xinjiang University, Urumqi 830046, China

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Abstract With 75 soil samples collected in Qitai County,Xinjiang, the spectral reflectance (R), logarithm of reciprocal spectral reflectance (lg(1/R)), first derivative spectral reflectance(FDR)and spectral band depth(Depth)were used to analyze the relationship between the visible-near infrared (VNIR) spectrum and the content of the nutrient elements N、P、K of the soil. Prediction models were established with tested precision levels. The results showed that: the VNIR had great potential to estimate rapidly three nutrient elements content of soil, and the order of prediction accuracy values for the nutrient elements was: N>P>K. The inversion model accuracy varied on different spectral indicators, and the predictive effect for Depth and FDR were obviously superior to lg (1/R) and R. The fitting effect of N and P elements was: lg(1/R)<R<FDR<Depth, and the inversion models established by the index of Depth were the best for N and P; while the inversion accuracy value for K element was: lg(1/R)<R<Depth<FDR, and the inversion model established by the index of FDR was optimal for K.

Key words: soil spectrum nutrient elements inversion model Qitai County

Received: 03 March 2013 Published: 20 September 2014

ZTFLH:

S151.9



	Articles by authors
	Luan Fuming
	Xiong Heigang
	Wang Fang
	Zhang Fang

Cite this article:

Luan Fuming, Xiong Heigang, Wang Fang, Zhang Fang. Hyperspectral Reflectance Inversion Models on Content of N, P, K of Soil in Oasis-Desert Ecotone. JOURNAL OF DESERT RESEARCH, 2014, 34(5): 1320-1328.

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http://www.desert.ac.cn/EN/10.7522/j.issn.1000-694X.2013.00231 OR http://www.desert.ac.cn/EN/Y2014/V34/I5/1320

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