American Journal of Plant Sciences

Volume 11, Issue 1 (January 2020)

ISSN Print: 2158-2742   ISSN Online: 2158-2750

Google-based Impact Factor: 1.34  Citations  h5-index & Ranking

Forage Production and Selection for Vigor in Meadow and Hybrid Bromegrass in the Northern Great Plains

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DOI: 10.4236/ajps.2020.111008    215 Downloads   350 Views  

ABSTRACT

Meadow bromegrass (Bromus riparius Rehmann) is an important forage crop in Canada and the Intermountain West, but it has not been extensively evaluated in the northern Great Plains (NGP). Our objectives were to 1) evaluate meadow, smooth, and hybrid bromegrasses for forage production under intensive management in eastern South Dakota, and 2) evaluate the effect of selection for vigor in multiple environments on forage production of meadow bromegrass. Thirteen populations (7 meadow bromegrass, 5 hybrid bromegrass, and 1 smooth bromegrass) were evaluated for 4 yrs (2005-2007, 2009) at Brookings, SD. Biomass at anthesis was greater for smooth (6.75 Mg ha-1) than for meadow or hybrid brome (5.4 Mg ha-1) in 2005, but production at anthesis during 2006 and 2007 was similar for meadow and smooth bromegrass. Regrowth harvested during July and October 2005 and November 2006 was greater for meadow than smooth or hybrid bromegrass. Forage production at anthesis in 2009, after rest (i.e., no cutting) and fertilization in 2008, was 4.2 Mg ha-1 for meadow bromegrass compared with 3.3 Mg ha-1 and 2.6 Mg ha-1 for hybrid and smooth bromegrass, respectively. Smooth and hybrid bromegrasses had more leaves·tiller-1 than meadow bromegrass. After 6 yrs, meadow bromegrass had higher tiller density and greater potential for tolerating multiple harvests during a growing season than did smooth or hybrid bromegrass. Selection for vigor in multiple environments in North America resulted in experimental populations of meadow bromegrass with superior forage yield compared with Fleet on marginal crop land in the northern Great Plains.

Cite this paper

Similien, R. , Boe, A. and Coulman, B. (2020) Forage Production and Selection for Vigor in Meadow and Hybrid Bromegrass in the Northern Great Plains. American Journal of Plant Sciences, 11, 91-110. doi: 10.4236/ajps.2020.111008.

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