In-field assessment of wheat-leaf polyphenolics using the new optical leaf-clip Dualex

Z.G. Cerovic; A. Cartelat; Y. Goulas; S. Meyer

In-field assessment of wheat-leaf polyphenolics using the new optical leaf-clip Dualex

In: Precision Agriculture â05

Authors:

Z.G. Cerovic

Z.G. Cerovic ¹Laboratoire ESE-CNRS, BÃ¢t 362, Centre Univ. Paris-Sud, F-91405 Orsay, France
zoran.cerovic@ese.u-psud.fr

Search for other papers by Z.G. Cerovic in
Current site
Google Scholar
PubMed

A. Cartelat

A. Cartelat ¹Laboratoire ESE-CNRS, BÃ¢t 362, Centre Univ. Paris-Sud, F-91405 Orsay, France

Search for other papers by A. Cartelat in
Current site
Google Scholar
PubMed

Y. Goulas

Y. Goulas ²LURE-CNRS, BÃ¢t 203, Centre Univ. Paris-Sud, BP 34, F-91898 Orsay, France

Search for other papers by Y. Goulas in
Current site
Google Scholar
PubMed

, and

S. Meyer

S. Meyer ¹Laboratoire ESE-CNRS, BÃ¢t 362, Centre Univ. Paris-Sud, F-91405 Orsay, France

Search for other papers by S. Meyer in
Current site
Google Scholar
PubMed

Type:: Chapter

Pages:: 243â250

DOI:: https://doi.org/10.3920/978-90-8686-549-9_030

Purchase instant access (PDF download and unlimited online access):

â¬42.00â¬35.00Â excl. VAT

Add to Cart

Redeem Access Token

In addition to the widely known leaf chlorophyll (Chl) detection by absorbance or reflectance, we propose here to use optical assessment of leaf polyphenolics content (Phen) as an indicator of crop nitrogen (N) status. We developed a portable instrument based on chlorophyll fluorescence excitation spectra, the DualexÂ®, adapted to measurements of leaf Phen content in the field. It operates in full daylight with a UV beam at 375 nm and a red reference beam at 650 nm. Thanks to the use of a patented feedback loop, measurements take less than a second. We used the DualexÂ® to follow the dynamics of wheat-leaf Phen in fields that had received different N fertilisation rates. We showed that wheat crops under N deficiency accumulate more Phen. Thus, Phen responded in an opposite manner to Chl. We propose the use of the Chl to Phen ratio as an indicator of crop N status. This new indicator is more sensitive than Chl or Phen alone, and alleviates, at least partially, the problem of gradients along wheat leaves. This is an important argument in favour of the implementation of both Chl and Phen measurements to the next generation of active non-contact sensors for real-time site-specific N management.

Citation Info

Save
Cite
Email this content

Share link with colleague or librarian

You can email a link to this page to a colleague or librarian:
Email this content
or copy the link directly:

https://brill.edhh.ma/abstract/book/9789086865499/BP000030.xml
The link was not copied. Your current browser may not support copying via this button.

Link copied successfully

Collapse
Expand

Precision Agriculture â05

E-Book ISBN:: 9789086865499

Publisher:: Wageningen Academic

Print Publication Date:: 24 Oct 2005

Subjects
- Life Sciences
  - General
  - Agriculture & Environment

Metrics

	All Time	Past 365 days	Past 30 Days
Abstract Views	176	82	22
Full Text Views	11	1	0
PDF Views & Downloads	12	2	0

African Studies	Education	Media Studies
American Studies	History	Middle East and Islamic Studies
Ancient Near East and Egypt	Human Rights and Humanitarian Law	Musicology
Art History	International Law	Philosophy
Asian Studies	International Relations	Religious Studies
Biblical Studies	Jewish Studies	Slavic and Eurasian Studies
Biology	Languages and Linguistics	Social Sciences
Book History and Cartography	Life Sciences	Theology and World Christianity
Classical Studies	Literature and Cultural Studies

Subjects

Authors

Open Access

Product Information

Company

Contact

In-field assessment of wheat-leaf polyphenolics using the new optical leaf-clip Dualex

Citation Info

Share link with colleague or librarian

Precision Agriculture â05

Table of Contents

Metrics

Metrics

Precision Agriculture â05