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Open AccessFeature PaperArticle

Nitrogen Fertilizer Management in Dryland Wheat Cropping Systems

1
Department of Plant Sciences, Southwest Research and Extension Center, University of Idaho, Parma, ID 83660, USA
2
Private Enterprise of Raths Ranch, Roundup, MT 59072, USA
*
Author to whom correspondence should be addressed.
Received: 11 December 2017 / Revised: 29 December 2017 / Accepted: 25 January 2018 / Published: 29 January 2018
(This article belongs to the Special Issue Soil Fertility and Nutrient Cycling)
Wheat is the most widely cultivated food crop in the world, which provides nutrition to most of the world population and is well adapted to a wide range of environmental conditions. Timely and efficient rates of nitrogen (N) application are vital for increasing wheat grain yield and protein content, and maintaining environmental sustainability. The goal of this study was to investigate the effect of using different rates and split application of N on the performance of spring wheat in dryland cropping systems. The experiment was conducted in three different locations in Montana and Idaho during two consecutive growing seasons. A split-plot experimental design was used with three at planting N fertilization application (0, 90 and 135 kg N ha−1) and two topdressing N fertilization strategies as treatments. A number of variables such as grain yield (GY), protein content (GP) in the grains and N uptake (NUP) were assessed. There was a significant effect of climate, N rate, and time application on the wheat performance. The results showed that at-planting N fertilizer application of 90 kg N ha−1 has significantly increased GY, GP and NUP. On the other hand, for these site-years, increasing at-planting N fertilizer rate to 135 kg N ha−1 did not further enhance wheat GY, GP and NUP values. For all six site-years, topdress N fertilizer applied at flowering did not improve wheat GY, GP and NUP compared to at-planting fertilizer alone. As the risk of yield loss is minimal with split N application, from these results we concluded the best treatment for study is treatments that had received 90 kg N ha−1 split as 45 kg N ha−1 at planting and 45 kg N ha−1 at flowering. View Full-Text
Keywords: wheat; nitrogen; grain yield; protein content; nitrogen uptake wheat; nitrogen; grain yield; protein content; nitrogen uptake
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MDPI and ACS Style

Walsh, O.S.; Shafian, S.; Christiaens, R.J. Nitrogen Fertilizer Management in Dryland Wheat Cropping Systems. Plants 2018, 7, 9. https://doi.org/10.3390/plants7010009

AMA Style

Walsh OS, Shafian S, Christiaens RJ. Nitrogen Fertilizer Management in Dryland Wheat Cropping Systems. Plants. 2018; 7(1):9. https://doi.org/10.3390/plants7010009

Chicago/Turabian Style

Walsh, Olga S.; Shafian, Sanaz; Christiaens, Robin J. 2018. "Nitrogen Fertilizer Management in Dryland Wheat Cropping Systems" Plants 7, no. 1: 9. https://doi.org/10.3390/plants7010009

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