@article{d29c0e359bc94c4894e872070f5b6f4e,
title = "Nitrogen Demand Associated with Increased Biomass Yield of Switchgrass and Big Bluestem: Implications for Future Breeding Strategies",
abstract = "Development of perennial biomass cropping systems is focused on maximizing biomass yield with minimum inputs, particularly nitrogen (N) fertilizer. Historical breeding efforts have focused on increasing biomass yield but have ignored N-use efficiency. The purpose of this study was to quantify the increased N demand associated with realized gains in biomass yield from big bluestem (Andropogon gerardii Vitman) and switchgrass (Panicum virgatum L.) breeding programs. Nitrogen demand was highly variable across locations and years, ranging from − 1.7 to + 6.8 kg N Mg−1 DM, with an average of 2.2 kg N Mg−1 DM. Increases in N demand were closely associated with realized gains in biomass yield and were observed for all types of switchgrass (upland, lowland, and hybrid) as well as for big bluestem. Attenuation of these responses will require alternative breeding schemes that are focused on evaluation of switchgrass genotypes and progeny under low-N conditions and include a high-throughput tissue N analysis as a component of future selection criteria, designed to develop new cultivars with high biomass yield and low tissue N.",
keywords = "Andropogon gerardii Vitman, Breeding, Genetics, Nitrogen-use efficiency, Panicum virgatum L",
author = "Casler, {Michael D.} and Lee, {Do Kyoung} and Mitchell, {Robert B.} and Adler, {Paul R.} and Sulc, {R. Mark} and Johnson, {Keith D.} and Kallenbach, {Robert L.} and Boe, {Arvid R.} and Mathison, {Russell D.} and Cassida, {Kim A.} and Doohong Min and Moore, {Kenneth J.}",
note = "Funding Information: We thank Anne Kinzel for her dedication, financial and personnel management, emotional support, and inspiration throughout the duration of the CenUSA project. We also thank Chris Kapp, Michigan State University, Chatham, MI; Roger Hintz, Iowa State University, Ames, IA; Danny England, University of Missouri, Columbia, MO; John McCormick, Ohio State University, Columbus, OH; Joe Crawford, University of Illinois, Urbana, IL; Steve Masterson, USDA-ARS, Lincoln, NE; Matt Myers, USDA-ARS, University Park, PA; Nick Baker, USDA-ARS, Madison, WI; and Joe Halinar, USDA-ARS, Madison, WI for their expert assistance with planting, plot maintenance and management, data collection, and sample preparation throughout the course of this experiment. We especially thank our former colleague, Kenneth P. Vogel (USDA, retired), for his critical review and comments which helped to improve the clarity of this paper. Funding Information: This research was funded by the Agriculture and Food Research Initiative Competitive Grant No. 2011-68005-30411 from the USDA National Institute of Food and Agriculture (CenUSA). Publisher Copyright: {\textcopyright} 2019, This is a U.S. Government work and not under copyright protection in the US; foreign copyright protection may apply.",
year = "2020",
month = mar,
day = "1",
doi = "10.1007/s12155-019-10081-y",
language = "English (US)",
volume = "13",
pages = "120--131",
journal = "Bioenergy Research",
issn = "1939-1234",
publisher = "Springer",
number = "1",
}