Integrated crop‐livestock systems result in less nitrate leaching than ungrazed crop systems in North Florida

Santos, Erick R. S.; Dubeux, José C. B.; Mackowiak, Cheryl L.; Wright, David L.; Anguelov, Gueorgui

doi:10.1002/jeq2.20474

Cited by 2 publications

(2 citation statements)

References 43 publications

(68 reference statements)

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“…Soil samples collected in May 2017 reported pH water of 6.1, 7.9 g kg −1 of soil organic matter (OM), and Mehlich-1-extractable P = 12.5 mg kg −1 (low), K = 36.5 mg kg −1 (medium), Mg = 57.5 mg kg −1 (medium), Ca = 358 mg kg −1 (adequate), S = 10 mg kg −1 (low), B = 0.16 mg kg −1 (low), Zn = 0.9 mg kg −1 (low), Mn = 30.5 mg kg −1 (very high), Fe = 8 mg kg −1 (adequate), and Cu = 0.25 mg kg −1 (low). This study was conducted in the same general experimental area of other projects that included cotton (Gossypium hirsutum L.) (Santos et al, 2022(Santos et al, , 2023. Due to that reason, irrigation management followed standard University of Florida/Institute of Food and Agricultural Sciences extension recommendation for cotton.…”

Section: Experimental Sitementioning

confidence: 99%

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Grazing intensity effects on sward responses of UF Riata Bahiagrass

Santos,

Dubeux,

Sollenberger

et al. 2023

Crop Science

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Bahiagrass (Paspalum notatum Flüggé) is a rhizomatous, perennial, warm‐season forage widely grown in the southeastern United States "UF Riata" bahiagrass is more upright growing with greater herbage production when days are shorter compared with most other cultivars. Lesser daylength sensitivity extends the grazing season, but in combination with more upright growth may negatively affect persistence under grazing, especially if out‐of‐season herbage production interferes with normal reserve storage. This 3‐year study investigated above and belowground sward responses of UF Riata bahiagrass to three levels of post‐grazing herbage mass (HM) (500 [heavy grazing, HG], 1500 [moderate grazing], or 2500 [light grazing, LG] kg DM ha−1, where DM is dry matter) imposed by mob stocking every 14 days. Total herbage accumulation (HA) and HA rate were not affected by treatment. Crude protein (CP) was affected by treatment × grazing cycle × year, whereas in vitro digestible organic matter concentrations were affected by treatment × year and grazing cycle × year. Root–rhizome biomass (12,940–9230 kg OM ha−1, where OM is organic matter) and soil cover percentage (97%–93%) decreased linearly as grazing intensity increased from LG to HG. Proportion of non‐planted grasses was 34% and 17% in HG and LG swards, respectively. Proportion of non‐grass weeds increased across treatments from 2% to 22% over the years. Moderate grazing could maintain similar CP to HG, and similar root–rhizome biomass to LG. Thus, considering both sward persistence and forage nutritive value, a target post‐grazing HM of ≈1500 kg DM ha−1 is recommended when UF Riata pastures are grazed every 2 weeks.

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Section: Experimental Sitementioning

confidence: 99%

“…started active growth. Further information on the cool-season management of the plots can be found inSantos et al (2023).…”

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confidence: 99%

Grazing intensity effects on sward responses of UF Riata Bahiagrass

Santos,

Dubeux,

Sollenberger

et al. 2023

Crop Science

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Sustainable intensification of livestock systems using forage legumes in the Anthropocene

Dubeux Jr,

Jaramillo,

Santos

et al. 2024

Grass and Forage Science

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Sustainable intensification of livestock systems implies greater efficiency in resource utilization resulting in greater output of products and other ecosystem services per unit of resource input. Integrating forage legumes into livestock systems is a viable way to reduce the input of industrial N fertilizer, reducing the use of fossil fuels and helping to mitigate global warming, a major problem during the Anthropocene. Some forage legumes have greater concentrations of secondary compounds, such as condensed tannins, that might reduce the emission of greenhouse gases (GHG) from ruminant eructation and excreta. Furthermore, forage legumes might enhance cattle performance because of greater nutritive value, resulting in greater production per unit of GHG released. Shortening the production cycle and improving cattle reproductive efficiency could have a major impact on reducing the overall carbon footprint of the system. Grazing systems with more diversified plant species are typically more resistant and resilient, adapting to current climate changes during the Anthropocene. Novel technologies might accelerate the development of future grazing systems using forage legumes as a key component. Breeding efforts for the next‐generation legumes must focus on adaptation and potential use for mitigation of negative environmental impacts. There are examples of successful integration of forage legumes into livestock systems in different regions of the world, with a major reduction in off‐farm inputs and maintaining the system productive. These successful examples could be used to increase adoption and improve the efficiency of current livestock systems.

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Integrated crop‐livestock systems result in less nitrate leaching than ungrazed crop systems in North Florida

Cited by 2 publications

References 43 publications

Grazing intensity effects on sward responses of UF Riata Bahiagrass

Grazing intensity effects on sward responses of UF Riata Bahiagrass

Sustainable intensification of livestock systems using forage legumes in the Anthropocene

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