Relative Nitrogen Fertilizer Requirements of Forage Versus Grain for Barley and Oat

Malhi, S. S.; Berkenkamp, W. B.; McBEATH, D. K.

doi:10.1080/01904167.2014.907422

Cited by 5 publications

(2 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It is well known that first‐year corn following alfalfa rarely needs fertilizer N. However, research on N contribution of alfalfa to small grain forages is sparse. There are many studies that investigate nitrogen requirements of small grains grown as a forage (e.g., Harmoney & Thompson, 2005; Khalil et al., 2011; Malhi, Berkenkamp, & McBeath, 2014), but few that examined the requirements when small grain forages are grown after alfalfa. A California study in 2013 and 2014 showed that nonfertilized wheat following 2‐year‐old alfalfa at three sites had increased aboveground biomass accumulation compared to wheat following sudangrass [ Sorghum bicolor (L.) Moench.]…”

Section: Introductionmentioning

confidence: 99%

Nitrogen fertilizer needs of first‐year small grain forages following alfalfa

et al. 2021

View full text Add to dashboard Cite

Small grain forages are commonly grown following alfalfa (Medicago sativa L.) in Utah and the Intermountain West, especially during drought years as small grains require less irrigation than corn (Zea mays L.). Several studies have shown that corn following alfalfa rarely needs nitrogen (N) fertilizer, yet few have evaluated N needs of small grains grown for forage. Objectives of this research were to determine whether N fertilizer is needed to economically optimize the yield and quality of first-year small grain forages following alfalfa, and whether spring soil nitrate tests can predict N responsiveness. Fertilizer trials (four replications of six N rates) were conducted on 11 first-year small grain forage sites in Utah during 2018 and 2019.Results indicated that N fertilizer was not needed to economically increase small grain forage yield at most (91%) site-years. The one responsive site-year followed an old and thinning alfalfa stand (9-yr old) and required only 67 kg N ha −1 . In contrast, forage quality improved with average N fertilizer applications ranging from 101 to 142 kg N ha −1 at all but one site-year. Soil nitrate concentration was able to separate yield and forage quality response to N in 73 and 53% of the cases, respectively, suggesting it may be a viable prediction test for yield and some aspects of quality response in this rotation. Results indicate that growers often do not need to apply fertilizer N to first-year small grain forages unless compensation for forage quality improvement outweighs fertilizer costs.

show abstract

Section: Introductionmentioning

confidence: 99%

Nitrogen fertilizer needs of first‐year small grain forages following alfalfa

et al. 2021

View full text Add to dashboard Cite

show abstract

“…The yield and quality of barley forage and grain are influenced by a number of factors such as seeding rate (Lithourgidis & Dordas, 2010; Salama, 2019), cutting stage (Chen et al., 2017; Guney et al., 2016; Royo et al., 1997), cutting frequency (Chen et al., 2016; Jebbouj & Yousfi, 2009), nitrogen fertilizer application (Malhi et al., 2014), and cropping system (Mosebi et al., 2018; Raskin et al., 2017; Sadeghpour et al., 2013). Delayed harvesting increased barley forage yield but reduced grain yield as well as forage quality (Salama, 2019; Seymour et al., 2015).…”

Section: Introductionmentioning

confidence: 99%

Breeding for purpose: Sole‐ and dual‐use barley

et al. 2021

View full text Add to dashboard Cite

Barley (Hordeum vulgare L.) in south-central China can be either harvested at earlydough stage as a sole-use (SU) forage crop or as a dual-use (DU) crop that is grazed at early jointing stage for forage and harvested at mature stage for grain. A 2-yr field experiment was conducted to compare genotypic differences in yield and quality of forage and grain for both SU and DU production. Barley genotypes differed significantly in forage yield for both SU and DU, among which six-row genotypes were superior to two-row genotypes especially in SU production. Wansipi 14008 had the greatest forage yield with the averaged fresh weights of 3.3 and 1.01 kg m −2 for SU and DU, respectively, across 2 yr. Greater differences for forage crude protein (CP) content were found among genotypes for SU than those for DU, suggesting a more effective selection of barley varieties to improve CP content for SU production. The contents of crude fiber (CF), acid detergent fiber (ADF), and neutral detergent fiber (NDF) differed among genotypes for both SU and DU, which were affected by the environmental conditions as well. Grain yield from DU treatment showed less variation than grain quality and agronomic traits. The high forage yield variety Wansipi 14008 could be recommended to farmers as a desired barley variety for both SU and DU production in south-central China.

show abstract

Effect of N supply on the carbon economy of barley when accounting for plant size

Negrini

Evans

Kaiser

et al. 2020

Functional Plant Biol.

View full text Add to dashboard Cite

Nitrogen availability and ontogeny both affect the relative growth rate (RGR) of plants. In this study of barley (Hordeum vulgare L.) we determined which growth parameters are affected by nitrate (N) availability, and whether these were confounded by differences in plant size, reflecting differences in growth. Plants were hydroponically grown on six different nitrate (N) concentrations for 28 days, and nine harvests were performed to assess the effect of N on growth parameters. Most growth parameters showed similar patterns of responses to N supply whether compared at common time points or common plant sizes. N had a significant effect on the biomass allocation: increasing N increased leaf mass ratio (LMR) and decreased root mass ratio (RMR). Specific leaf area (SLA) was not significantly affected by N. RGR increased with increasing N supply up to 1 mM, associated with increases in both LMR and net assimilation rate (NAR). Increases in N supply above 1 mM did not increase RGR as increases in LMR were offset by decreases in NAR. The high RGR at suboptimal N supply suggest a higher nitrogen use efficiency (biomass/N supply). The reasons for the homeostasis of growth under suboptimal N levels are discussed.

show abstract

Relative Nitrogen Fertilizer Requirements of Forage Versus Grain for Barley and Oat

Cited by 5 publications

References 7 publications

Nitrogen fertilizer needs of first‐year small grain forages following alfalfa

Nitrogen fertilizer needs of first‐year small grain forages following alfalfa

Breeding for purpose: Sole‐ and dual‐use barley

Effect of N supply on the carbon economy of barley when accounting for plant size

Contact Info

Product

Resources

About