Structural characteristics of Puerto Rico stargrass (Cynodon nlemfuensis) pastures under different frequencies and severities of defoliation

Carvalho, Carlos Augusto Brandão de; Filho, S. T. Camargo; Paciullo, Domingos Sávio Campos; Zanella, Pablo Giliard; Modesto, Elisa Cristina; Fernandes, Priscila Beligoli

doi:10.17138/tgft(1)60-62

Cited by 5 publications

(3 citation statements)

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“…For this to be achieved, optimum grazing conditions must be satisfied to ensure efficient grazing. It is worth noting that 4‐ and 8‐week regrowth Brachiaria hybrid is within the range of 20–40 cm pregraze sward height required to optimize DM intake in grazed tropical pastures 25 . This provides further evidence that these grasses could support high levels of production in grazing systems.…”

Section: Discussionmentioning

confidence: 67%

“…It is worth noting that 4-and 8-week regrowth Brachiaria hybrid is within the range of 20-40 cm pregraze sward height required to optimize DM intake in grazed tropical pastures. 25 This provides further evidence that these grasses could support high levels of production in grazing systems. The tall erect M. maximus with lower bulk density may result in lower intake because of low bite volume.…”

Section: Herbage Characteristicsmentioning

confidence: 79%

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Optimum nitrogen fertilization rate and nitrogen use efficiency forBrachiariahybrid andMegathyrsus maximusvaries with stage of regrowth

2022

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Background Traditionally, recommended nitrogen (N) fertilization rates that maximize biomass yield and nutritive value in tropical grass forages tend to be fixed and do not consider possible stage of maturity‐induced variations. Therefore, this study investigated biomass yield and nutritive value of Brachiaria hybrid and Megathyrus maximus at different stages of maturity in response to incremental levels of N fertilizer. Both grasses were fertilized with urea at rates equivalent to 0, 25, 50, and 75 kg N ha−1 and harvested after 4‐, 8‐, and 12‐week regrowth. Results Crude protein (CP) had a linear response to increasing N fertilization at all stages of regrowth. Herbage yield of M. maximus was optimized with 57.1–63.0 kg N ha−1, while herbage yield in 4‐weeks regrowth Brachiaria hybrid was optimized with 59.1 kg N ha−1. The combination of herbage yield, 24 h in‐vitro organic matter digestibility, and CP were optimized with 59.1 and 68.2 kg N ha−1 in 4‐weeks regrowth Brachiaria hybrid and 8‐week regrowth M. maximus, respectively. The efficiency of N fertilizer use for herbage and CP yield was highest with 25 and 75 kg N ha−1, respectively except for 8‐weeks regrowth Brachiaria hybrid. Conclusion It was concluded that the herbage yield and nutritive value of 4‐week regrowth Brachiaria hybrid and 8‐week regrowth M. maximus are optimized with 59.1 and 68.2 kg N ha−1, respectively, while all other stages of regrowth were optimized with 75 kg N ha−1.

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Section: Discussionmentioning

confidence: 67%

Section: Herbage Characteristicsmentioning

confidence: 79%

Optimum nitrogen fertilization rate and nitrogen use efficiency forBrachiariahybrid andMegathyrsus maximusvaries with stage of regrowth

2022

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“…Even in the 12‐week regrowth, the green leaf percent of P. atratum in the present study was much higher than earlier report for Brachiaria species (Hare et al, 2009). A high proportion of green leaf will positively influence intake and performance of the grazing animals especially when pre‐grazing sward height does not exceed 40 cm (Da Silva & De Carvalho, 2005; De Carvalho et al, 2013). Therefore, 6‐week regrowth P. atratum , irrespective of fertilizer regime, could facilitate high dry matter intake at pasture.…”

Section: Discussionmentioning

confidence: 99%

Interactive effects of growth stage and nitrogen fertilization on herbage characteristics and nutritive value of Paspalum atratum

2021

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Paspalum atratum is a tropical grass with potential to contribute to forage availability in areas dominated by waterlogged acidic soils. However, little is known of the interactive effect of N fertilization and stage of harvest on its nutritive value.Therefore, the objectives of this study were to evaluate the interactive effects of N fertilization and harvesting stage on herbage characteristics and nutritive value of P. atratum (Cv. Ubon) and to determine the optimum N fertilization rate at each stage of regrowth. P. atratum seedlings were planted in 18,631-cm 3 plastic pots containing growth media amended with 0, 25, 50, and 75 kg N/ha. Forage was harvested after 6-and 12-weeks regrowth. Nitrogen fertilizer had a significant effect (p < 0.05) on herbage yield, sward height, crude protein yield, crude protein concentration, and 12-and 24-h in vitro ruminal organic matter digestibility (IVOMD). P. atratum fertilized with 50 kg N/ha produced the highest dry matter yield (1,133 kg DM/ha) at 12-week regrowth. Crude protein (CP) was highest (133 g/kg DM) in 6-week regrowth forage that received 50 kg N/ha. IVOMD at 12 and 24 h of incubation was highest in 6-week regrowth forage amended with 0 and 50 kg N/ha, respectively. Herbage characteristics and nutritive value of P. atratum showed a quadratic response to N fertilization at both regrowth stages. Response surface optimization indicated that N fertilizer application rates of 56.0 and 52.3 kg N/ha maximized P. atratum herbage yield, CP content, and 12-h IVOMD at 6-and 12-week regrowth, respectively. It was, therefore, concluded that the herbage yield and nutritive value of 6-and 12-week regrowth P. atratum is optimized with N fertilizer rates of 56.0 and 52.3 kg N/ha, respectively.

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Low Cost System Based on Textile and Plastic Waste for Underground Irrigation in the Brazilian Semi-arid Region

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2018

Innovation, Engineering and Entrepreneurship

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Structural characteristics of Puerto Rico stargrass (Cynodon nlemfuensis) pastures under different frequencies and severities of defoliation

Cited by 5 publications

References 1 publication

Optimum nitrogen fertilization rate and nitrogen use efficiency forBrachiariahybrid andMegathyrsus maximusvaries with stage of regrowth

Optimum nitrogen fertilization rate and nitrogen use efficiency forBrachiariahybrid andMegathyrsus maximusvaries with stage of regrowth

Interactive effects of growth stage and nitrogen fertilization on herbage characteristics and nutritive value of Paspalum atratum

Low Cost System Based on Textile and Plastic Waste for Underground Irrigation in the Brazilian Semi-arid Region

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