Herbage Characteristics of Continuously Stocked Limpograss Cultivars under Stockpiling Management

Vendramini, J. M. B.; Sollenberger, Lynn E.; Oliveira, Fábio Cortez Leite de; Herling, Valdo Rodrigues; Gomes, Vinicius Carreteiro; Sanchez, J. M. D.; Yarborough, James K.

doi:10.2135/cropsci2019.05.0299

Cited by 10 publications

(14 citation statements)

References 19 publications

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“…This supports that in guineagrass pastures managed under optimal grazing frequency (e.g., 95% canopy LI) (Congio et al., 2019), stem proportion does not play a major role in the upper stratum when LGI is imposed (Euclides et al., 2016). On the other hand, the HGI lower stratum presented 5.7‐fold greater stem proportion than the LGI, a response observed by others (Vendramini et al., 2019).…”

Section: Discussionsupporting

confidence: 66%

“…Quênia is a taller cultivar than Tamani, requiring more support tissue. This needs to be considered in devising grazing management strategies because of the lesser digestibility of stem than leaf tissue (Vendramini et al., 2019). In addition, grazing intensity affects the canopy structure (Carnevalli et al., 2006; Pedreira & Pedreira, 2007).…”

Section: Discussionmentioning

confidence: 99%

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Herbage responses of Tamani and Quênia guineagrasses to grazing intensity

et al. 2020

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New forage cultivars require defoliation studies for recommending proper grazing management. Our objective was to characterize herbage accumulation (HA), plantpart composition and nutritive value of guineagrass [Megathyrsus maximus (Jacq.) B. K. Simon & S. W. L. Jacobs] rotationally stocked under two grazing intensities. The experimental design was a randomized complete block with three replicates of a 2 × 2 factorial arrangement of two guineagrass cultivars ('BRS Quênia' and 'BRS Tamani') and two grazing intensities. Heavy (HGI) and lax (LGI) grazing intensities were imposed as post-grazing stubble heights: 15 and 25 cm for Tamani, and 20 and 35 cm for Quênia, respectively. The experimental period was from -grazing HM was sampled as two strata above the stubble height, each comprising 50% of the sampled height (upper and lower stratum). Total herbage accumulation was similar across years, cultivars, and intensities (16,810 kg DM ha −1 ). Quênia and Tamani had the greatest HA during summer. The leaf proportion was least in the HGI pastures. Under HGI, the lower stratum of both cultivars had the greatest stem proportion and the least nutritive value. The greatest herbage CP concentration and the least NDF, ADF, iNDF and LIG concentrations occurred in the upper stratum. Based on these results, 35 and 55 cm are recommended as target heights for initiation of grazing, and 25 and 35 cm as post-grazing stubble heights for Tamani and Quênia, respectively.

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Section: Discussionsupporting

confidence: 66%

Section: Discussionmentioning

confidence: 99%

Herbage responses of Tamani and Quênia guineagrasses to grazing intensity

et al. 2020

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“…Guará and Marandu also had a greater leaf proportion than Tupi, which had the greatest stem accumulation and proportion (Table 4). These responses highlight the leafy growth characteristic of Guará and Marandu, an important trait often related to herbage digestibility (Vendramini et al., 2019) and N concentration (Irving, 2015; Taiz, Zeiger, Møller, & Murphy, 2017), resulting in greater nutritive value (Euclides et al., 2016; Tesk et al., 2018).…”

Section: Discussionmentioning

confidence: 93%

Herbage accumulation, canopy characteristics, and nutritive value of tropical grasses in the Amazon biome

et al. 2020

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Forage species diversification reduces risk associated with forage–livestock production. In the Amazon biome, an alternative is needed to ‘Marandu’ palisadegrass [Urochloa brizantha (Hochst. ex A. Rich.) R.D. Webster] because of Marandu death syndrome. Our objective was to compare herbage accumulation (HA), canopy characteristics, and nutritive value of Marandu with two alternative grasses, ‘Guará’ (Paspalum regnellii Mez) and ‘Tupi’ [Urochloa humidicola (Rendle) Morrone & Zuloaga]. During 2 yr, grasses were clipped to a 12‐cm stubble height every 28 (rainy season) or 42 d (dry season). Annual HA did not differ across years for Guará (13.7 Mg dry matter [DM] ha−1) and Tupi (12.2 Mg DM ha−1); however, Marandu HA was 30% less in the second than the first year. Marandu had greatest annual HA in the first year (15.5 Mg DM ha−1), and Guará was superior to the other grasses in the second year (13.5 Mg DM ha−1). Tupi had the least leaf proportion among grasses in both rainy and dry seasons, and its leaf proportion was greater in the dry than rainy season (715 vs. 610 g kg−1). Greatest stem proportion was observed in Tupi and the least stubble mass occurred in Guará (2000 kg DM ha−1). When differences in crude protein occurred, Tupi concentrations (80–130 g kg−1) were less than either Guará (97–157 g kg−1) or Marandu (81–139 g kg−1). Overall, Tupi and Guará HA and nutritive value support their recommendation as alternatives to Marandu monoculture in Amazon forage‐based livestock systems.

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“…In this layer, there may have been greater morphological differentiation between pastures, such as the predominance of live leafe in pastures with 15 and 25 cm and more inflorescences and stems in those deferred with 35 and 45 cm. On the other hand, in the middle and end of the grazing period, animals probably consumed the most basal strata of pastures, where stems and dead forage prevails, regardless of the previous management used (Vendramini et al, 2019). This may have contributed to the absence of a well-defined response for nutritional value in the middle and end of the grazing period.…”

Section: Resultsmentioning

confidence: 99%

Intake and digestibility of nutrients during the grazing period in sheep on deferred marandu pastures with four initial heights

Silva¹,

Fonseca²,

Oliveira³

et al. 2021

Semina: Ciênc. Agrár.

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The objective of this study was to verify the effect of reducing in pasture height at the beginning of the deferment period (PHBD) of Brachiaria brizantha cv. Marandu on nutrient intake and digestibility in sheep during winter. The combinations between average sward heights (15, 25, 35 and 45 cm) at the beginning of the deferment period and the times of sward use during the winter were evaluated; intake and digestibility evaluations were carried out at the beginning, middle and end of the grazing period, which lasted 90 days. The experimental design used was completely randomized, with three replications. The parameters evaluated were: intake and digestibility of dry matter (DM), crude protein (CP) and neutral detergent fiber (NDF) and potentially digestible dry matter (pDDM). The pDDM contents were similar in pastures kept with 15 and 25 cm, but higher than those observed in pastures with 35 and 45 cm at the beginning of the deferment period. The NDF contents were lower and the CP and NDF digestibility were higher in 15 and 25 cm deferred pastures than in 35 cm at the beginning of deferment period, except for pastures lowered to 45cm. The improvement in nutritional value of the forage apparently ingested by sheep, promoted by ISP reduction, did not result in a variation in pasture consumption by the animals. DMI, expressed as percentage of body weight (%BW), ranged from 1.10 to 1.63. At the beginning of the grazing period, higher values of pDDM, CP and DM digestibility (DMD) were verified in simulated grazing samples. The same response pattern observed for nutritional value traits also occurred for DMI (g.day-1 and %BW) and CP intake. These were higher at the beginning, than at the middle and end of the grazing period. The use of lower sward heights at the beginning of the deferment period allowed the production of pasture with better nutritional quality, but these changes in the nutritional value of the pasture were insufficient to result in higher nutrient intake and digestibility. Furthermore, there was a reduction in nutritional value of the forage apparently consumed by sheep, in the intake and digestibility of deferred pastures throughout the grazing period, in winter. The lower pastures at the beginning of the deferment period (15 cm) improves the nutritional value of forage and nutrient digestibility at the beginning of the winter grazing period. The nutritional value and intake of deferred forage by sheep are compromised by the grazing period.

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Herbage Characteristics of Continuously Stocked Limpograss Cultivars under Stockpiling Management

Cited by 10 publications

References 19 publications

Herbage responses of Tamani and Quênia guineagrasses to grazing intensity

Herbage responses of Tamani and Quênia guineagrasses to grazing intensity

Herbage accumulation, canopy characteristics, and nutritive value of tropical grasses in the Amazon biome

Intake and digestibility of nutrients during the grazing period in sheep on deferred marandu pastures with four initial heights

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