Green Manure and Forage Potential of Lablab in the U.S. Southern Plains

Northup, Brian K.; Rao, Srinivas C.

doi:10.2134/agronj14.0455

Cited by 24 publications

(31 citation statements)

References 26 publications

(39 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Another potential factor related to legume function as accumulators of green N may have been low N fixation by symbiotic bacteria due to the small N enrichment provided by the fertilizer (11 kg N ha −1 ) at planting of legumes. However, a comparison of the amount of N accumulated in soybean in the early growing season of this study (Northup and Rao, 2015a) with N accumulated by soybean in an earlier study (Rao et al, 2005) at the same area that received 0–46–0 fertilizer, and the same amount of P, showed similar amounts of N accumulated in soybean biomass (15 to 20 kg N ha −1 yr −1 ). This similarity in response to fertilizer formulations indicated the limited amounts of N provided at legume planting in the current study had little impact on N fixation during the summer.…”

Section: Resultssupporting

confidence: 47%

“…Both legumes showed distinct declines in biomass produced and N accumulated in biomass during the study (Table 1). Readers interested in effects and interactions in the performance of the legumes as sources of biomass and N are referred to Northup and Rao (2015a) for results. Biomass generated and N accumulated in biomass was greater and relatively uniform during the 2008 and 2009 summer growing seasons, but declined during the last half of the study period with continued dry growing conditions during part or all of 2010 and 2011 (Northup and Rao, 2015a).…”

Section: Resultsmentioning

confidence: 99%

“…A possible cause for reduced amounts of accumulated N could be a lack of nodulation by legumes. However, regular checks showed plants of both species produced nodules during all years of the experiment that varied with growing conditions, though there was no guarantee of N 2 fixation by bacteria (Northup and Rao, 2015a).…”

Section: Resultsmentioning

confidence: 99%

“…Recent research in Oklahoma has explored the potential of Rio Verde lablab as a fodder within wildlife plots (Muir et al, 2008), as summer forage or green manure (Northup and Rao, 2015a), and how lablab green manures affected grain production of continuous wheat systems in the SGP (Northup and Rao, 2015b). However, the effect of lablab used as a green N source on wheat forage has not been reported.…”

mentioning

confidence: 99%

See 3 more Smart Citations

Effects of Legume Green Manures on Forage Produced in Continuous Wheat Systems

Northup

Rao

2016

Agronomy Journal

Self Cite

View full text Add to dashboard Cite

Inorganic N fertilizers are important to continuous systems of winter wheat (Triticum aestivum L. em Thell.) in the U.S. southern Great Plains (SGP). Costs have increased in recent years and resulted in producers considering summer‐grown legumes as green N sources. This study (2008–2012) defined effects of lablab [Lablab purpureus (L.) Sweet ‘Rio Verde’] cover crops on subsequent forage production by wheat under conventional and no‐till management, compared to soybean [Glycine max (L.) Merr. ‘Laredo’], two inorganic fertilizer rates (40; 80 kg N ha−1yr−1), and unfertilized controls. Inoculated legume seeds were sown annually after wheat harvest, grown during June to August, and terminated in early‐September. Wheat was sown late‐September and samples collected at four growth stages through maturity. Wheat forage (kg ha−1), N concentration (g kg−1) and N accumulated (kg N ha−1) in forage were analyzed to define treatment, tillage, growth stage, and year effects. Precipitation was 53 to 92% of long‐term average (LTA) for the wheat growing (October‐May) period (1977–2012; 688 mm). Treatment x year interaction was significant (P < 0.01) for biomass, N concentration, and N accumulated in forage. Treatment effects on forage production varied among years; response to legume treatments were ≤ control. Response of N concentration and N accumulated in forage under legume treatments were largely ≤ control; responses to all treatments declined with length of study. Neither legume was an effective N source for forage production by continuous wheat systems in the SGP.

show abstract

Section: Resultssupporting

confidence: 47%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

mentioning

confidence: 99%

See 2 more Smart Citations

Effects of Legume Green Manures on Forage Produced in Continuous Wheat Systems

Northup

Rao

2016

Agronomy Journal

Self Cite

View full text Add to dashboard Cite

show abstract

“…Soybean has been used as a control for forage quality comparisons in many studies testing annual legumes as summer forage. Under weather and soil conditions similar to this study, some annual legumes outperformed soybean in some, but not all aspects of forage quality except lablab (Lablab purpureus (L.) Sweet) [9]. However, amount of biomass production by both soybean and lablab was limited by low precipitation.…”

Section: Grin Idsupporting

confidence: 57%

Mothbean: A Potential Summer Crop for the Southern Great Plains

Baath¹,

Northup²,

Gowda³

et al. 2018

AJPS

Self Cite

View full text Add to dashboard Cite

Low nutritive value of available warm-season grasses during July through September limits the production of yearling stocker cattle in the southern Great Plains (SGP). There has been a continual exploration of species with the capacity to provide high quality forage during summer. Mothbean (Vigna aconitifolia [Jacq.] Marechal), a short-duration, drought tolerant crop is a promising choice for the SGP. This preliminary study evaluated the potential of mothbean as a summer crop for forage, grain or green manure. Results of this study with 10 mothbean lines from a range of geographic locations suggested that crop could be harvested 100 days after planting with dry biomass yield range of 7.3-18.1 Mg•ha −1. Mothbean forage contained 10.8%-14.6% crude protein (CP), 32.0%-41.7% neutral detergent fiber (NDF), 20.7%-29.6% acid detergent fiber (ADF), and 73%-84% in vitro true digestibility (IVTD) at maturity. Grain yield of the 10 mothbean lines varied from 91 to 1040 kg•ha −1. The 10 tested lines generated a high amount of nitrogen (N) rich biomass at maturity with total accumulated N of 163-316 kg•ha −1 and a C:N ratio of 16:1 to 22:1. Overall, performance indicators suggested that mothbean has considerable potential as an alternative crop for production of forage, grain, or green manure when grown as summer crop in rotation with winter wheat. Future research should focus on evaluating mothbean within different crop settings to define its capacity as green manure or summer forage to support production of stocker cattle in the SGP.

show abstract

Summer forage capabilities of tepary bean and guar in the southern Great Plains

et al. 2020

Self Cite

View full text Add to dashboard Cite

Low nutritive value of perennial warm‐season grasses often causes limitation to stocker cattle production in the U.S. southern Great Plains (SGP). Exploration of novel legumes capable of generating nutritious summer forage is required to fill forage deficit periods. This 2‐yr field experiment compared the seasonal changes in forage biomass, leaf/stem ratio, and chemical composition of three varieties each of tepary bean [Phaseolus acutifolius (A.) Gray] and guar [Cyamopsis tetragonoloba (L.) Taub.] to soybean [Glycine max (L.) Merr.]. Tepary bean cultivar Black outperformed soybean and guar varieties by producing 18–48% greater aboveground dry matter (ADM) amounts (6537 kg ha−1) with a leaf/stem ratio of 3.1 at 65 days after planting (DAP). The ADM and leaf nutritive value of soybean were not surpassed by the other five tested legumes, but had the least digestible stems with an in vitro true digestibility (IVTD) of 529–581 g kg−1 in both years. Guar varieties maintained a lower leaf/stem ratio (1.3–1.5 kg kg−1) throughout the growing season, which could limit its value for grazing compared to other legumes. We concluded tepary bean could serve as an alternate forage option to soybean for producers in the SGP. Tepary bean possessed the greatest capabilities for producing adequate biomass yields with superior and consistent nutritive value when grown as a summer forage. Future research should focus on defining management practices for growing tepary bean in extensive production settings for grazing or hay.

show abstract

Green Manure and Forage Potential of Lablab in the U.S. Southern Plains

Cited by 24 publications

References 26 publications

Effects of Legume Green Manures on Forage Produced in Continuous Wheat Systems

Effects of Legume Green Manures on Forage Produced in Continuous Wheat Systems

Mothbean: A Potential Summer Crop for the Southern Great Plains

Summer forage capabilities of tepary bean and guar in the southern Great Plains

Contact Info

Product

Resources

About