Morphogenic and structural characteristics of Panicum cultivars during the establishment period in the Brazilian Northeast

Costa, Ana Beatriz Graciano da; Difante, Gelson dos Santos; Gurgel, Antônio Leandro Chaves; Veras, Emmanuel Liévio de Lima; Rodrigues, Jéssica Gomes; Pereira, Marislayne de Gusmão; Santos, Anna Yanka de Oliveira; Neto, João Virgínio Emerenciano; Montagner, Denise Baptaglin

doi:10.4025/actascianimsci.v43i1.50984

Cited by 4 publications

(6 citation statements)

References 27 publications

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“…The linear increase in canopy height is consistent with the establishment period (Table 2), since when the forage is in the initial phase of vegetative growth, an increase in the average height of the sward over the days is observed, regardless of the cultivar (5,6) . The recommended height to interrupt growth is around 30 cm for Brachiaria cultivars (9,10,11) , 70 cm for Quênia (12) and 35 cm for Tamani (13) .…”

Section: Discussionsupporting

confidence: 80%

“…Marandu indicates that this cultivar did not reach the maximum value during its establishment. The always-higher NLL in Urochloa brizantha cultivars in comparison to Megathyrsus maximus cultivars can be attributed to their genetics, since the number of leaves formed in Urochloa brizantha cultivars is greater than in plants of Megathyrsus maximus (5,6,16) .…”

Section: Discussionmentioning

confidence: 99%

“…Understanding the evolution of the pasture structure throughout the establishment period allows for greater assertiveness about the time for the first grazing to be performed. In addition, understanding the morphological and structural changes of forage cultivars when subjected to different soil-climatic conditions allows to identify their mechanisms of adaptation to the environment and helps in choosing those cultivars with more vigorous establishment (6) .…”

Section: Introductionmentioning

confidence: 99%

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Establecimiento de gramíneas forrajeras tropicales en el bioma del Cerrado

Gurgel¹,

Difante²,

Costa³

et al. 2022

Rev. Mex. Cienc. Pecu.

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This study was carried out to evaluate the time for the establishment of tropical forage grasses in the “Cerrado” biome, based on morphogenetic and structural traits. Three Brachiaria brizantha (Syn. Urochloa brizantha) cultivars (Paiaguás, Ipyporã and Marandu) and two Panicum maximum (Syn. Megathyrsus maximus) cultivars (Quênia and Tamani) were distributed in a randomized-block design with four replicates. Morphogenetic and structural traits of the pasture were assessed from d 35 to d 65 after sowing, at seven-day interval. Canopy height rose linearly with the establishment period, in all cultivars. In the Megathyrsus cultivars, tiller density decreased as the experimental period progressed, whereas the number of tillers in the Urochloa cultivars increased. The cultivars Ipyporã and Marandu had the highest leaf appearance rates. The lowest leaf elongation rates occurred in the cultivars Paiaguás, Ipyporã and Tamani, and the highest elongation rates in cv. Quênia. As a result, cv. Quênia showed the highest values of final leaf length (64.9 cm) and leaf blade mass (3,352.9 kg DM ha-1). The higher senescence rate of cv. Tamani (2.1 cm tiller-1 d-1) resulted in the highest percentage of dead material (1,815.5 kg ha-1) being found in the herbage mass of this cultivar. Cultivars Paiaguás, Marandu and Tamani were established at 44 d, whereas cv. Quênia and Ipyporã were established at 51 and 58 d after sowing, respectively, in the Brazilian Cerrado.

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Section: Discussionsupporting

confidence: 80%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Establecimiento de gramíneas forrajeras tropicales en el bioma del Cerrado

Gurgel¹,

Difante²,

Costa³

et al. 2022

Rev. Mex. Cienc. Pecu.

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“…This adaptation is related to the regulation of CO 2 and leaf temperature and decreased water loss provided by changes in stomatal opening (Zandalinas et al, 2018). Interestingly, Costa et al (2021) reported no difference between three M. maximum cultivars (Massai, Tanzania, and Mombaça), although their forage masses were similar to those found in the current study. other Urochloa cultivars (P = 0.01) (Table 2).…”

Section: Resultssupporting

confidence: 72%

“…Rodrigues et al (2021) evaluated the forage mass of five Urochloa cultivars (Marandu, Piatã, Xaraés, Basilisk, and Paiaguás) and observed no statistical differences between the cultivars in a semiarid condition. Costa et al (2021) also observed no statistical differences in forage mass between six M. maximum cultivars in a semiarid condition. However, little research has been done on the intrinsic characteristics of water use efficiency of Megathyrsus or Urochloa in semiarid conditions (Beloni et al, 2018; P. M. Santos et al, 2013).…”

Section: Brazilianmentioning

confidence: 65%

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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