Triticum aestivum L., wheat, nitrogen, urease inhibitor, protein


The efficiency of nitrogen (N) fertilizer management depends on rate, timing, placement, and source, but the benefits of an integrated program have not been clearly quantified, to our knowledge. This study aimed to investigate the effects of integrated N management on winter wheat grain yield, grain protein content, grain test weight, and biomass in Kansas. The study consisted of two N management treatments: Normal (single N application as UAN using broadcast nozzles with the absence of urea inhibitors); and Progressive (split N application into two timings using streamer bars with urease inhibitors). Both treatments had similar results in all variables measured at Hutchinson, which was the lowest yielding location. In Ashland Bottoms, the number of heads/ft2and total aboveground biomass did not differ significantly between the treatments. However, grain yield, grain test weight, and protein content were significantly greater in the progressive N management. These results demonstrate the enhanced N use efficiency (NUE) of progressive N management in higher-yielding environments by better N allocation in the plant. This research demonstrates that it is possible to increase both grain protein content and grain yield in high rainfall areas without extra amounts of N fertilizer.


Rights Statement

In Copyright - Educational Use Permitted.

To view the content in your browser, please download Adobe Reader or, alternately,
you may Download the file to your hard drive.

NOTE: The latest versions of Adobe Reader do not support viewing PDF files within Firefox on Mac OS and if you are using a modern (Intel) Mac, there is no official plugin for viewing PDF files within the browser window.