Alternatives to Conventional Nitrogen Fertilization on Tall Fescue and Bermudagrass

Corbin, M. D.; Nave, Renata La Guardia; Bates, Gary E.; Butler, David M.; Hawkins, Sarah

doi:10.2134/agronj2018.03.0190

Cited by 8 publications

(15 citation statements)

References 29 publications

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“…Corbin et al. (2018) observed that CW in a mixture with TF performed better when TF was stressed by drought conditions; however, in our study, CW did not establish well, and its drought tolerance characteristic was not observed.…”

Section: Resultscontrasting

confidence: 95%

“…In a recent study evaluating alternatives to N fertilization on TF swards, it was shown that unfertilized TF did not differ from a treatment of TF mixed with CW (50 lb acre −1 ) during two consecutive years (Corbin et al., 2018), which agrees with findings from our study. Corbin et al.…”

Section: Resultssupporting

confidence: 93%

“…Corbin et al. (2018) also showed that TF mixed with CW resulted in the lesser total forage mass and nutritive value than mixtures with other legume species such as white and red clover. However, Corbin et al.…”

Section: Resultsmentioning

confidence: 99%

“…However, Corbin et al. (2018) also showed that TF and CW mixtures had the greatest forage mass early in the summer compared with other legumes. Our present study, however, showed that overseeding CW into a recently established TF sward at a greater‐than‐recommended seeding rate resulted in the same forage mass as TF alone probably due to TF competitiveness.…”

Section: Resultsmentioning

confidence: 99%

“…Research is needed to evaluate alternative forage crops to potentially increase overall mass and nutritive value of forages during summer months and thus extend the grazing season for beef production. Corbin, Nave, Bates, Butler, & Hawkins, 2018, studying alternatives to conventional N fertilization, showed that mixtures of TF and 50 lb acre −1 of CW resulted in the greatest forage mass. The same study also reported greater CP concentration in early summer compared with mixtures of TF and other forage legumes.…”

Section: Introductionmentioning

confidence: 99%

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Forage mass, nutritive value, and economic viability of cowpea overseeded in tall fescue and sorghum‐sudangrass swards

Nave

Quinby

Griffith

et al. 2020

Crop Forage & Turfgrass Mgmt

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Cowpea (Vigna unguiculata L. Walp) (CW) is being considered as an alternative feed source in the southern U.S. Legume–grass mixtures are known to provide greater forage mass compared with unfertilized grass monocultures; however, research is needed to evaluate alternatives for increasing forage availability during the summer. The objective of this study was to quantify forage mass, nutritive value, and economic viability of CW overseeded in tall fescue [Schedonorus arundinaceus (Schreb.) Dumort.] (TF) and sorghum × sudangrass hybrid [Sorghum bicolor (L.) Moench × Sorghum sudanese (P.) Stapf] (SS) swards seeded at different rates. Two experiments were established in Spring Hill, TN, one with TF and the other with SS, from June to September of 2016 and 2017. Inoculated CW seeds were drilled into TF and SS plots at 25, 50, or 75 lb acre−1 and compared with control treatments that were without CW. There were no differences in total and average forage mass of TF or SS with the addition of CW, regardless of the seeding rate, likely due to the competitiveness of the grasses. No differences among seed rates were observed in the concentration of crude protein (CP) for TF swards mixed with CW in either year while in vitro dry matter digestibility (IVDMD) was less for the control treatment in 2017. Meanwhile, the nutritive value of the SS and CW mixture was improved as the CW seeding rate increased in both years. Data from this study suggest that the addition of CW to TF or SS does not justify its cost given the minimal benefit provided.

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Section: Resultscontrasting

confidence: 95%

Section: Resultssupporting

confidence: 93%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Forage mass, nutritive value, and economic viability of cowpea overseeded in tall fescue and sorghum‐sudangrass swards

Nave

Quinby

Griffith

et al. 2020

Crop Forage & Turfgrass Mgmt

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Herbage mass responses to sod suppression with glyphosate in pastures interseeded with sorghum × sudangrass

Jenkins,

Hillhouse,

Guretzky

2024

Agrosystems Geosci & Env

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Interseeding annual warm‐season forages into perennial cool‐season grasses may increase herbage mass and quality. Yet, methods to do so successfully remain elusive. From 2020 to 2022, we conducted an experiment that evaluated herbage mass responses to sod suppression after interseeding sorghum × sudangrass [Sorghum bicolor (L.) Moench × S. bicolor (L.) Moench ssp. drummondii (Nees ex Steud.) de Wet & Harlan] in three N‐fertilized and three mixed‐legume smooth bromegrass (Bromus inermis Leyss.) pastures. Sod suppression treatments included glyphosate [N‐(phosphonomethyl) glycine] applications of 0, 0.55, 1.10, 1.65, and 2.20 kg ha−1 on pastures that were heavily grazed in two rotational stocking periods in spring and an additional 0 kg ha−1 glyphosate control where herbage was stockpiled throughout spring, mowed, and removed before interseeding sorghum × sudangrass. In herbage samples collected 8 weeks after treatment, perennial grass mass showed exponential decay responses as glyphosate rate increased, while sorghum × sudangrass, weedy grass, and total herbage mass showed logistic growth responses. Sorghum × sudangrass reached a high of 2316 kg ha−1 as glyphosate rate increased to 1.65 kg ha−1 while weedy grass mass continued to increase as glyphosate rate increased to 2.20 kg ha−1. Reduced perennial grass mass in herbage samples collected the next spring indicated the presence of a tradeoff between increasing summer herbage now and reducing next spring herbage later with glyphosate application after interseeding sorghum × sudangrass. We concluded practitioners should not use glyphosate for sod suppression before interseeding warm‐season annual forages into perennial cool‐season grass pastures.

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Transitional organic forage systems in the southeastern U.S.: Production and nutritive value

et al. 2022

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Limited work has been done to develop organic forage programs in humid subtropical regions despite growing demand for high‐value forage and organic products. Alternative crops were compared for optimizing forage production and nutritive value under organic conditions in the southeastern United States. The study was conducted at the Middle Tennessee AgResearch and Education Center, in Spring Hill, Tennessee. Forage treatments consisted of (a) monoculture tall fescue [Schedonorus arundinaceus (Schreb.) Dumort.], (b) monoculture bermudagrass [Cynodon dactlyon (L.) Pers.], (c) tall fescue and alfalfa (Medicago sativa L.) mixture, (d) bermudagrass and alfalfa mixture, and (e) an annual rotation of winter wheat (Triticum aestivum L.) mixed with winter pea (Pisum sativum L.) followed by sorghum–sudangrass [Sorghum bicolor (L.) Moench x S. sudanese (Piper) Stapf.] mixed with cowpea [Vigna unguiculata (L.) Walp.] mixture. Perennial treatments were established during the 2017–2018 growing season. Monthly production was measured in the 2018–2019 and 2019–2020 growing seasons. Botanical composition of forage mass fluctuated due to establishment dynamics and weed competition, affecting forage quantity and quality. The annual rotation was the highest‐yielding treatment, producing more than 6,000 kg−1, though each tall fescue and tall fescue–alfalfa treatments produced ∼4,000 kg ha−1. Nutritive value was sufficient for most livestock operations, with forage crude protein concentration averaging ∼150 g kg−1 across treatments and growing seasons. For transitioning organic producers, a perennial forage will likely favor long‐term sustainability, whereas the annual rotation may be useful during the transition period to reduce weed pressure before transitioning to a perennial forage system.

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Alternatives to Conventional Nitrogen Fertilization on Tall Fescue and Bermudagrass

Cited by 8 publications

References 29 publications

Forage mass, nutritive value, and economic viability of cowpea overseeded in tall fescue and sorghum‐sudangrass swards

Forage mass, nutritive value, and economic viability of cowpea overseeded in tall fescue and sorghum‐sudangrass swards

Herbage mass responses to sod suppression with glyphosate in pastures interseeded with sorghum × sudangrass

Transitional organic forage systems in the southeastern U.S.: Production and nutritive value

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