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Sugarcane Response to DRIS‐Based Fertilizer Supplements in Florida

Sugarcane Response to DRIS‐Based Fertilizer Supplements in Florida Soil testing is the primary basis for fertilizer recommendations in Florida sugarcane (Saccharum spp.), but it has the limitations of generally being performed only before the plant cane crop and not providing information for nitrogen or micronutrient availability. Leaf analysis is a useful diagnostic tool that can complement soil testing and may allow more cost‐effective fertilizer applications for each crop. The Diagnosis and Recommendation Integrated System (DRIS) was used to determine leaf nutrient status in a study evaluating the effectiveness of a summer fertilizer supplement. There were 19, 24 and 26 paired commercial field comparisons in 2004/05, 2005/06 and 2006/07 respectively. Each field of each test pair received normally recommended fertilizer applications based on pre‐plant soil tests, with one field of each pair receiving a June/July fertilizer supplement based on DRIS indices of leaf samples collected in April/May. There was no response in tonnes of sugarcane ha−1 or sugar tonne cane−1 to the fertilizer supplements for organic or mineral soils or for plant or first ratoon crops. A more cost‐effective use of leaf analysis appears to be with the adjustment of the next amendment or fertilizer application, generally for next year’s crop or at the next sugarcane planting, rather than adding an additional fertilizer supplement to the current crop. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Agronomy and Crop Science Wiley

Sugarcane Response to DRIS‐Based Fertilizer Supplements in Florida

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References (37)

Publisher
Wiley
Copyright
© 2009 University of Florida
ISSN
0931-2250
eISSN
1439-037X
DOI
10.1111/j.1439-037X.2009.00395.x
Publisher site
See Article on Publisher Site

Abstract

Soil testing is the primary basis for fertilizer recommendations in Florida sugarcane (Saccharum spp.), but it has the limitations of generally being performed only before the plant cane crop and not providing information for nitrogen or micronutrient availability. Leaf analysis is a useful diagnostic tool that can complement soil testing and may allow more cost‐effective fertilizer applications for each crop. The Diagnosis and Recommendation Integrated System (DRIS) was used to determine leaf nutrient status in a study evaluating the effectiveness of a summer fertilizer supplement. There were 19, 24 and 26 paired commercial field comparisons in 2004/05, 2005/06 and 2006/07 respectively. Each field of each test pair received normally recommended fertilizer applications based on pre‐plant soil tests, with one field of each pair receiving a June/July fertilizer supplement based on DRIS indices of leaf samples collected in April/May. There was no response in tonnes of sugarcane ha−1 or sugar tonne cane−1 to the fertilizer supplements for organic or mineral soils or for plant or first ratoon crops. A more cost‐effective use of leaf analysis appears to be with the adjustment of the next amendment or fertilizer application, generally for next year’s crop or at the next sugarcane planting, rather than adding an additional fertilizer supplement to the current crop.

Journal

Journal of Agronomy and Crop ScienceWiley

Published: Feb 1, 2010

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