Evaluating the potential nitrogen savings without yield loss using variable nitrogen application strategies in a heterogeneous winter wheat field

Rasmus Nyholm Jørgensen, Claus Aage Grøn Sørensen, Henning Tangen Søgaard, Ole Green, Tina Lundholm Madsen

Research output: Contribution to conference without publisher/journalPaperResearchpeer-review

Abstract

During a single growth season, a plot trial was carried out in a selected heterogeneous field in Denmark in an attempt to estimate the optimal variable nitrogen rate applied to winter wheat. 61 Nitrogen/grain yield dose–response curves were estimated using five nitrogen application rates (30, 90, 120, 180, and 240 kg N ha−1). Provided the dose–response curves were given in advance, enabling optimal nitrogen redistribution, the resulting gain in grain yield would have been less than 0.3 t ha−1. However, from an environmental point of view the data showed that significant nitrogen reductions could be obtained without significant yield loss applying a variable nitrogen application strategy compared to a uniform application.

 

Keywords: variable nitrogen application; optimal nitrogen rate; dose response curve

 

Original languageEnglish
Publication date2009
Publication statusPublished - 2009
Event10th International Conference on Precision Agriculture - Denver, United States
Duration: 18. Jul 201021. Jul 2010
Conference number: 10

Conference

Conference10th International Conference on Precision Agriculture
Number10
Country/TerritoryUnited States
CityDenver
Period18/07/201021/07/2010

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