Comparing hyperspectral vegetation indices for estimating nitrogen concentration of winter wheat

F. Li, Y. Miao, S. D. Hennig, M. L. Gnyp, X. Chen, L. Jia, G. Bareth

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Many vegetation indices have been developed to estimate crop N status at leaf and canopy levels. However, research is lacking to compare these indices for estimating plant N concentration of winter wheat (Triticum aestivum L.) at different growth stages using a common dataset. The objective of this study is to identify promising hyperspectral vegetation indices for estimating winter wheat N concentration and compare them with a series of published vegetation indices using field data from farmers' fields. Three field experiments involving different winter wheat varieties and 4 to 6 N rates were conducted with cooperative farmers during 2005-2007 in Shandong Province, China. Data from 69 farmers' fields were used to evaluate the hyperspectral vegetation indices for estimating winter wheat N concentration. Two classes of indices were tested involving all possible two band combinations from 350 nm to 1075 nm: simple ratio index (SRI) and normalized difference index (NDI). Results indicated that the performance of different hyperspectral vegetation indices and band combinations differed with growth stages and years.

Original languageEnglish (US)
Title of host publicationPrecision Agriculture 2009 - Papers Presented at the 7th European Conference on Precision Agriculture, ECPA 2009
Pages141-149
Number of pages9
StatePublished - Dec 1 2009
Event7th European Conference on Precision Agriculture, ECPA 2009 - Wageningen, Netherlands
Duration: Jul 6 2009Jul 8 2009

Publication series

NamePrecision Agriculture 2009 - Papers Presented at the 7th European Conference on Precision Agriculture, ECPA 2009

Other

Other7th European Conference on Precision Agriculture, ECPA 2009
CountryNetherlands
CityWageningen
Period7/6/097/8/09

Keywords

  • Hyperspectral remote sensing
  • Nitrogen concentration
  • Vegetation index
  • Winter wheat

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