Forage yield and morphogenesis of Megathyrsus maximus cultivars in Roraimas’s savannas

Costa, N. de L.; Magalhães, João Avelar; Bendahan, Amaury Burlamaqui; Rodrigues, B. H. N.; Santos, F. J. de S.

doi:10.33448/rsd-v9i8.6054

Cited by 3 publications

(2 citation statements)

References 7 publications

(7 reference statements)

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“…Forage species of the genus Megathyrsus have the potential for use as cover crops in intercropping systems (Costa et al, 2020a;Costa et al, 2020b;Costa et al, 2020c;Dias et al, 2020;Pereira et al, 2021). However, it is necessary to suppress this grass for no competition between it and the grain crop (Adegas et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

Glyphosate doses in the suppression of Megathyrsus maximus cv. BRS Quênia intercropped with transgenic maize

Mello,

Jakelaitis,

Silva

et al. 2023

Rev. bras. eng. agríc. ambient.

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In the intercropping of maize with Megathyrsus maximus, the application of herbicides is a technique that can be used to reduce competition between intercrops. This study aimed to evaluate the effect of different glyphosate doses on suppressing the growth of Megathyrsus maximus cv. BRS Quênia intercropped with maize, as well as in weed control. The randomized block experimental design was used and conducted in the field. The treatments consisted of the application of six glyphosate doses, 0; 48; 96; 240; 480; 960 g acid equivalent [a.e.] ha-1, and a maize treatment without the forage with 960 g acid equivalent [a.e.] ha-1. The dose of 260.87 g a.e. ha-1 provides a 50% response to the forage production variable; therefore, it has the potential to suppress M. maximus cv. BRS Quênia. The presence of forage reduces the density and dry mass of weeds, with the species in the weed community: Ricinus communis, Eleusine indica, Alternanthera tenella, Commelina benghalensis, Conyza sp., and Digitaria horizontalis.

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Section: Introductionmentioning

confidence: 99%

Glyphosate doses in the suppression of Megathyrsus maximus cv. BRS Quênia intercropped with transgenic maize

Mello,

Jakelaitis,

Silva

et al. 2023

Rev. bras. eng. agríc. ambient.

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“…Among a large variety of grasses available are the cultivars Megathyrsus maximus BRS Zuri (COSTA et al, 2020) and Urochloa brizantha cv. Xaraes (SILVA et al 2016), which are grasses with a high capacity for forage mass production.…”

Section: Introductionmentioning

confidence: 99%

Morphological characteristics and production of Xaraes and Zuri grass fertilized with combinations of sulfur and potassium

Mota¹,

Lourenço²,

Motta³

et al. 2021

Bol. Ind. Anim.

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Sulfur and potassium are essential elements for the development of forages as part of protein synthesis, nutrient transport, activation of photosynthesis enzymes and stomatal activity. Thus, this study aimed was to evaluate the production and morphology of Xaraes grass (Urochloa brizantha cv. Xaraes) and Zuri grass (Megathyrsus maximus cv. Zuri) fertilized with combinations of sulfur (S) and potassium (K) (only S, only K, with S and K, and without both), and identify which of these nutrients should be prioritized in maintenance fertilization. Two experiments were conducted in the greenhouse, in a completely randomized design. The first experiment was utilized the Xaraes grass and the second experiment the Zuri grass. Each experimental plot consisted of 5 dm3 pots with five plants per pot. All treatments were fertilized 200 mg/dm3 per pot with nitrogen. On treatments fertilized with sulfur it were applied ammonium sulfate (21% N and 24% S) as nitrogen supply, thus, it was applied 228 mg/dm3 of sulfur per plot. On treatments without sulfur, the nitrogen source was urea (46% N). The treatments with potassium were fertilized 100 mg/dm3 with potassium, utilizing potassium chloride (58% K2O). The harvest was performed when the plants reached the height of 35 and 75 cm, for xaraes and zuri respectively. For Xaraes grass, the fertilization with S and K in different combinations had a significant effect (P<0.05) on forage mass, leaves number and tillers per pot, individual tiller mass, leaf blade, stem + sheath, and dead material, as well as relative forage mass. For Zuri grass, the combinations of S and K showed statistical difference (P<0.05) just on leaf blade mass and dead material, and the number of leaves per pot, as well as on relative leaf blade mass. Based on the results obtained in the two experiments, the S and K combination in the maintenance fertilization of xaraes grass improves the forage development, however, S does not increase the productive indexes of zuri grass.

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Grazing management of Megathyrsus maximus BRS Tamani under shading: Effects of morphogenetic, physiological, and herbage characteristics

da Cruz,

Anésio,

Santos

et al. 2024

Agroforest Syst

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Forage yield and morphogenesis of Megathyrsus maximus cultivars in Roraimas’s savannas

Cited by 3 publications

References 7 publications

Glyphosate doses in the suppression of Megathyrsus maximus cv. BRS Quênia intercropped with transgenic maize

Glyphosate doses in the suppression of Megathyrsus maximus cv. BRS Quênia intercropped with transgenic maize

Morphological characteristics and production of Xaraes and Zuri grass fertilized with combinations of sulfur and potassium

Grazing management of Megathyrsus maximus BRS Tamani under shading: Effects of morphogenetic, physiological, and herbage characteristics

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