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ARS Home » Southeast Area » Auburn, Alabama » Soil Dynamics Research » Research » Publications at this Location » Publication #392174

Research Project: Conservation Systems to Improve Production Efficiency, Reduce Risk, and Promote Sustainability

Location: Soil Dynamics Research

Title: Variation in NUE among Brassica Carinata genotypes grown in a controlled environment

item IBOYI, JOSEPH - University Of Florida
item MULVANEY, MICHAEL - University Of Florida
item SEEPAUL, RAMDEO - University Of Florida
item SMALL, IAN - University Of Florida
item BASHYAL, MAHESH - University Of Florida
item LEON, RAMON - North Carolina State University
item DEVKOTA, PRATAP - University Of Florida
item Balkcom, Kipling
item GEORGE, SHEEJA - University Of Florida
item WRIGHT, DAVID - University Of Florida

Submitted to: ASA-CSSA-SSSA Annual Meeting Abstracts
Publication Type: Abstract Only
Publication Acceptance Date: 1/11/2022
Publication Date: 2/14/2022
Citation: Iboyi, J.E., Mulvaney, M.J., Seepaul, R., Small, I.M., Bashyal, M., Leon, R.G., Devkota, P., Balkcom, K.S., George, S., Wright, D.L. 2022. Variation in NUE among carinata genotypes grown in a controlled environment. Southern Branch American Society of Agronomy Annual Meeting, New Orleans, LA, Feb. 12-14, 2022.

Interpretive Summary:

Technical Abstract: Brassica carinata, an alternative non-food oilseed crop, is used to produce aviation biofuels due to its high oil content and favorable fatty acid profile. Maximizing yield for commercial production of Brassica carinata in the southeast United States (SE US) requires management of soil nitrogen (N) availability, the quantitatively most important nutrient required for crop growth which is insufficient in soils of the SE US and must be supplied as fertilizer. To ensure the competitiveness of Brassica carinata at agronomic, environmental, and economic levels, it is necessary to develop carinata cultivars with improved N stress tolerance and high seed and oil yield under low soil N availability. This involves identifying carinata genotypes with superior nitrogen use efficiency (NUE), either by possessing a high N uptake efficiency (NUpE) or high N utilization efficiency (NUtE), or both. A greenhouse study was conducted in Quincy FL to quantify genotypic variation in NUE and to identify indicators of N efficient genotypes during 2019/2020 growing season. Seed yield, biomass, NUE, NUpE, and NUtE were compared among 16 carinata genotypes under contrasting N supplies (0, 80.5, and 161 mg N L-1 in Hoagland solution). Preliminary results from this trial will be presented.