Acúmulo de forragem e estrutura do dossel do capim-Xaraés submetido a intensidades de cortes

Rodrigues, Rosane Cláudia; Lana, Rogério de Paula; Júnior, José Antônio Alves Cutrim; Sanchês, Sâmara Stainy Cardoso; Galvão, Carlos Magno Lima; Sousa, Thiago Vinícius Ramos de; Amorim, Susan Emanuelly Pinheiro; Jesus, Ana Paula Ribeiro de

doi:10.1590/s1519-99402014000400002

Cited by 4 publications

(5 citation statements)

References 13 publications

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“…Consequently, grazing management strategies that modify or alter this component directly influence LAI, PAR, and the rest period. Therefore, the lower the residual LAI, the longer the rest period that is required to reach the target pre-grazing condition (RODRIGUES et al, 2014). In the present study, the post-grazing LAI (1.78) and PAR (57.90%) were lower at 2 cm than that at 6 cm RLB, resulting in an increase in the rest period from 30 to 37 days.…”

Section: Resultsmentioning

confidence: 41%

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Effect of post-grazing residual leaf blade-length on the regrowth vigor of Piatã grass grazed under intermittent stocking

Costa

Alexandrino

Neto

et al. 2019

SCA

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The objective of this study was to evaluate the effect of post-grazing residual leaf blades (RLB) of different lengths on the morphogenic and structural characteristics of Urochloa brizantha ‘Piatã’ grazed upon by beef cattle. A completely randomized design was used, with three RLB lengths (2, 4, and 6 cm) and two paddocks as replicates over two grazing seasons (wet and wet-dry transition). To monitor the weekly forage growth, two representative clumps and 48 tillers per treatment were marked after grazing. The procedure continued until the plants reached the target pre-grazing height of 35–40 cm. Morphogenic characteristics were not affected by the treatments or seasons, with minor changes observed in mean sheath length (MSL) within season and tiller population density (TPD). The MSL reached its peak value of 210.37 mm during the wet season relative to 175.89 mm during the wet-dry transition. The TPD reached its lowest value (680 tillers m-2) at the highest defoliation intensity (2 cm) relative to that at the lowest defoliation intensity (720 tillers m-2). The different RLB lengths modified canopy height variably; canopy height was the highest with the 6 cm leaves (24.31 cm), but did not vary between the 2 cm and 4 cm leaves. The post-grazing leaf area index and interception of photosynthetically active radiation were modified by season. The highest defoliation intensity (2 cm) increased the rest period by seven days when compared with the lowest defoliation intensity (6 cm).

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Section: Resultsmentioning

confidence: 41%

“…The mean value found was 2.99 mm tiller -1 day -1 . Stem elongation interferes directly with grazing efficiency due to the narrowing of the leaf to stem ratio, which is not desirable when aiming for a high-quality forage (CUTRIM JÚNIOR et al, 2010;RODRIGUES et al, 2014).…”

Section: Resultsmentioning

confidence: 99%

Effect of post-grazing residual leaf blade-length on the regrowth vigor of Piatã grass grazed under intermittent stocking

Costa

Alexandrino

Neto

et al. 2019

SCA

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“…The moderate defoliation intensity in the LI strategy (42.96%) suggested that only the upper stratum of the pasture was removed (Oliveira et al, 2015;Cardoso et al, 2020). Consequently, the post-grazing heights in LI pastures were proportionally high, which allowed rapid pasture recovery, more grazing cycles and shorter resting periods for reaching the target pre-grazing height in the subsequent grazing cycle (Rodrigues et al, 2014). The pregrazing FMP was 18.33% higher in LI than in HI strategy, with a total production of 11.62 t ha -1 of DM, which in turn increased the forage density by 13.21%.…”

Section: Resultsmentioning

confidence: 99%

Effect of grazing management strategies on the yield and nutritional value of Marandu grass in the semiarid of Brazil

Araújo

Sales

Monção

et al. 2021

Semina: Ciênc. Agrár.

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The objective of this study was to evaluate the effects of two grazing management strategies on structural, productive and nutritional parameters of Marandu grass (Urochloa brizantha cv. Marandu). A completely randomized block design with two pasture management strategies and eight replications (blocks) was used. The grazing management strategies were: (1) low intensity rotational grazing (LI), with a pre-grazing sward height of 40 cm and a post-grazing sward height of 24 cm, i.e., a defoliation intensity of 50%; (2) High intensity rotational grazing (HI), with a pre-grazing sward height of 40 cm and a post-grazing sward height of 10 cm (±70% defoliation intensity). Pastures were sampled before and after grazing for estimation of forage mass, forage accumulation rate, structural characteristics, nutritional value and dry matter intake.The LI strategy resulted in higher dry matter production than HI before (18.33%) and after grazing (49.06%), increasing pre-grazing forage density by 13.21% (P < 0.05). The production of potentially digestible dry matter was highest (P < 0.05) in LI strategy (21.3% before and 39.6% after grazing, respectively). Higher post-grazing green forage mass (45%) increased the residual crude protein in LI. The LI management strategy increased forage mass production and can be used in Marandu grass pastures.

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“…In the samples collected for the determination of forage mass, the leaf:stem ratio was determined by dividing the different morphological components into Light interception (LI) and leaf area index (LAI) were evaluated using an electronic ceptometer (Accupar PAR/LAI LP-80, Decagon Devices, Inc., Pullman, USA), taking three readings above and below the canopy in each experimental unit (Rodrigues et al, 2014). The LI and the LAI values corresponded to the average of the obtained readings.…”

Section: Methodsmentioning

confidence: 99%

Forage production, morphogenetic and structural components, and nutritional value of tropical grasses in the semiarid condition

Ramos

Pedreira²,

Santos³

et al. 2022

Semina: Ciênc. Agrár.

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The objective of this study was to evaluate the forage mass, morphogenetic and structural characteristics, and nutritional value of tropical forage grasses in semiarid conditions. Nine grasses were evaluated, namely, three cultivars of Urochloa brizantha (Marandu, MG4, and Piatã); Urochloa decumbens cv. Basilisk; Urochloa humidicola cv. Llanero; Urochloa ruziziensis cv. Kennedy; and three cultivars of Megathyrsus maximum (Massai, Mombaça, and Tanzania). The experiment was laid out in a randomized complete block design in a split-plot arrangement in which the main factor were the grass cultivars and the secondary factor the seasons, with five replications per treatment. The statistical model included the fixed effect of treatment (grass), whereas the season was included as a random effect within treatments. Urochloa brizantha cvs. Marandu, MG4, and Piatã and Urochloa decumbens cv. Basilisk produced on average 858 kg ha-1 more forage mass than cvs. Kennedy and Basilisk. Megathyrsus maximum cv. Mombaça produced 40% more forage mass than the other cultivars of M. maximum (4205 vs. 3001 kg ha-1). Urochloa ruziziensis cv. Kennedy showed the lowest water use efficiency (36%). Urochloa ruziziensis cv. Kennedy exhibited the lowest leaf weight among the Urochloa cultivars (740 vs. 1319 kg ha-1). There was no treatment effect for leaf weight in the M. maximum cultivars. Urochloa ruziziensis cv. Kennedy showed the highest values of total digestible nutrients and dry matter digestibility (1.84 and 2.34%, respectively) among the other Urochloa cultivars. The M. maximum cultivars showed little differences in nutritional values. Cultivars Marandu, Piatã, and Massai exhibited better productive responses in the edaphoclimatic conditions of this study. However, future studies must be conducted evaluating the adaptation of the forage grass under semiarid conditions. Considering the settings of this study, the grasses Urochloa brizantha cvs. MG4, Marandu, and Piatã, as well as Megathyrsus maximum cvs. Massai and Mombaça, can be used in the semiarid condition.

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Acúmulo de forragem e estrutura do dossel do capim-Xaraés submetido a intensidades de cortes

Abstract: Rev. Bras. Saúde Prod. Anim., Salvador, v.15, n.4, p.815-826 out./dez., 2014 Accumulation of forage and sward structure of Xaraés grass subjected to intensity of cuts

Cited by 4 publications

References 13 publications

Effect of post-grazing residual leaf blade-length on the regrowth vigor of Piatã grass grazed under intermittent stocking

Effect of post-grazing residual leaf blade-length on the regrowth vigor of Piatã grass grazed under intermittent stocking

Effect of grazing management strategies on the yield and nutritional value of Marandu grass in the semiarid of Brazil

Forage production, morphogenetic and structural components, and nutritional value of tropical grasses in the semiarid condition

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