Can Leaf Chlorophyll Measures at Differing Growth Stages be used as an Indicator of Winter Wheat and Spring Barley Nitrogen Requirements in Eastern Canada?
Abstract Plant need‐based N management approaches may increase the efficiency of N fertilizer application in wheat ( Triticum aestivum L.) and barley ( Hordeum vulgare L.). The leaf chlorophyll concentration estimated through the SPAD‐502 meter gives a relative assessment of N status in crop. Field...
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crwiley:10.1111/j.1439-037x.2005.00175.x 2024-06-23T07:54:46+00:00 Can Leaf Chlorophyll Measures at Differing Growth Stages be used as an Indicator of Winter Wheat and Spring Barley Nitrogen Requirements in Eastern Canada? Spaner, D. Todd, A. G. Navabi, A. McKenzie, D. B. Goonewardene, L. A. 2005 http://dx.doi.org/10.1111/j.1439-037x.2005.00175.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1439-037X.2005.00175.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1439-037X.2005.00175.x en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Journal of Agronomy and Crop Science volume 191, issue 5, page 393-399 ISSN 0931-2250 1439-037X journal-article 2005 crwiley https://doi.org/10.1111/j.1439-037x.2005.00175.x 2024-06-04T06:42:04Z Abstract Plant need‐based N management approaches may increase the efficiency of N fertilizer application in wheat ( Triticum aestivum L.) and barley ( Hordeum vulgare L.). The leaf chlorophyll concentration estimated through the SPAD‐502 meter gives a relative assessment of N status in crop. Field trials were conducted near St John's, Newfoundland, between 1997 and 2000 to describe the relationship between winter wheat and spring barley grain yield, protein content, protein yield and SPAD measurements, as affected by differential stage of crop growth, seeding rate and topdress N fertilizer. Grain yield, protein content, and protein yield of winter wheat and spring barley exhibited linear responses to increasing N topdress application rate. SPAD‐502 values were moderately to highly positively correlated with grain yield, protein content, and protein yield as a result of increasing topdress N fertilization, and moderately negatively correlated as a result of increasing seeding rate. It may be difficult to make an N‐application rate recommendation based on SPAD measurements, as a critical SPAD value may vary among years, locations, cultivars and soil characters. Article in Journal/Newspaper Newfoundland Wiley Online Library Canada Journal of Agronomy and Crop Science 191 5 393 399 |
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Open Polar |
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Wiley Online Library |
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crwiley |
language |
English |
description |
Abstract Plant need‐based N management approaches may increase the efficiency of N fertilizer application in wheat ( Triticum aestivum L.) and barley ( Hordeum vulgare L.). The leaf chlorophyll concentration estimated through the SPAD‐502 meter gives a relative assessment of N status in crop. Field trials were conducted near St John's, Newfoundland, between 1997 and 2000 to describe the relationship between winter wheat and spring barley grain yield, protein content, protein yield and SPAD measurements, as affected by differential stage of crop growth, seeding rate and topdress N fertilizer. Grain yield, protein content, and protein yield of winter wheat and spring barley exhibited linear responses to increasing N topdress application rate. SPAD‐502 values were moderately to highly positively correlated with grain yield, protein content, and protein yield as a result of increasing topdress N fertilization, and moderately negatively correlated as a result of increasing seeding rate. It may be difficult to make an N‐application rate recommendation based on SPAD measurements, as a critical SPAD value may vary among years, locations, cultivars and soil characters. |
format |
Article in Journal/Newspaper |
author |
Spaner, D. Todd, A. G. Navabi, A. McKenzie, D. B. Goonewardene, L. A. |
spellingShingle |
Spaner, D. Todd, A. G. Navabi, A. McKenzie, D. B. Goonewardene, L. A. Can Leaf Chlorophyll Measures at Differing Growth Stages be used as an Indicator of Winter Wheat and Spring Barley Nitrogen Requirements in Eastern Canada? |
author_facet |
Spaner, D. Todd, A. G. Navabi, A. McKenzie, D. B. Goonewardene, L. A. |
author_sort |
Spaner, D. |
title |
Can Leaf Chlorophyll Measures at Differing Growth Stages be used as an Indicator of Winter Wheat and Spring Barley Nitrogen Requirements in Eastern Canada? |
title_short |
Can Leaf Chlorophyll Measures at Differing Growth Stages be used as an Indicator of Winter Wheat and Spring Barley Nitrogen Requirements in Eastern Canada? |
title_full |
Can Leaf Chlorophyll Measures at Differing Growth Stages be used as an Indicator of Winter Wheat and Spring Barley Nitrogen Requirements in Eastern Canada? |
title_fullStr |
Can Leaf Chlorophyll Measures at Differing Growth Stages be used as an Indicator of Winter Wheat and Spring Barley Nitrogen Requirements in Eastern Canada? |
title_full_unstemmed |
Can Leaf Chlorophyll Measures at Differing Growth Stages be used as an Indicator of Winter Wheat and Spring Barley Nitrogen Requirements in Eastern Canada? |
title_sort |
can leaf chlorophyll measures at differing growth stages be used as an indicator of winter wheat and spring barley nitrogen requirements in eastern canada? |
publisher |
Wiley |
publishDate |
2005 |
url |
http://dx.doi.org/10.1111/j.1439-037x.2005.00175.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1439-037X.2005.00175.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1439-037X.2005.00175.x |
geographic |
Canada |
geographic_facet |
Canada |
genre |
Newfoundland |
genre_facet |
Newfoundland |
op_source |
Journal of Agronomy and Crop Science volume 191, issue 5, page 393-399 ISSN 0931-2250 1439-037X |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/j.1439-037x.2005.00175.x |
container_title |
Journal of Agronomy and Crop Science |
container_volume |
191 |
container_issue |
5 |
container_start_page |
393 |
op_container_end_page |
399 |
_version_ |
1802647044140040192 |