MANEJO ECOFISIOLÓGICO DAS GRAMÍNEAS Megathyrsus maximus (Panicum maximum) cv. TANZÂNIA, MOMBAÇA E MASSAI

Kill-Silveira, Rafael

doi:10.35172/rvz.2020.v27.421

Cited by 4 publications

(1 citation statement)

References 15 publications

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“…In percentage terms, the participation of LTN represented only 30.9; 33.4; 33.8 and 29.7% of PTN, respectively for plants at 14, 28, 42 and 56 days of regrowth, which significantly contributes to the low GDM availability. The low ATN shows that there was no removal of the apical meristems, being grazing or mowing the most recommended practice, so that the predominance of basilar tillers over the axillary ones was not suppress (Costa et al, 2013;Souza, 2018;Silveira, 2020).…”

Section: Resultsmentioning

confidence: 99%

Evaluation of Natural Regrowth of Axonopus aureus under rest periods in Roraima´s Savannas

Costa

Rodrigues

2021

RSD

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The natural regrowth of Axonopus aureus in native pasture of Roraima´s savannas was evaluate, during early rainy period. The experimental design was a completely randomized, with four replications. The treatments consisted of four pasture rest periods (14, 28, 42 and 56 days after beginning of the rainy period). Evaluations were carry out during the period of June to August of 2016. The parameters measured were dry matter (DM) yields and grass morphogenetic and structural characteristics. The green and total DM, number of tillers plant-1, number of axillary tillers plant-1, number of live tillers plant-1, number of live leaves tiller-1 and leaf area index were directly proportional to rest periods. The leaf appearance and elongation rate were negatively affect by rest periods, while the dead DM was not affect by rest periods. Considering the low green DM availability of A. aureus, its recommends the utilization of some management practice, preferentially grazing or mowing, to remove the dead DM with low nutrition value and permit a grass vigorous regrowth in the beginning of the rainy period.

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Section: Resultsmentioning

confidence: 99%

Evaluation of Natural Regrowth of Axonopus aureus under rest periods in Roraima´s Savannas

Costa

Rodrigues

2021

RSD

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Irrigation management, light interception, and nitrogen in Tanzania grass cultivation

Cajá,

Silva,

Oliveira

et al. 2023

Rev. Caatinga

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Management of nitrogen fertilization and light interception of pastures contributes to forage production in regions with low water availability. Therefore, the objective was to evaluate the effect of different nitrogen doses and light interception levels on the growth of Panicum maximum cv. Tanzania under different irrigation managements. The experiment was carried out in a greenhouse, using a factorial scheme (5 x 2 x 2), corresponding to five irrigation depths (40, 60, 80, 100, and 120% of actual evapotranspiration), two canopy light interception levels (90 and 95%), and two nitrogen doses (300 and 600 kg N ha-1 year-1). The highest biomass production occurs under irrigation with 120% of evapotranspiration. However, the best structural characteristics (tillering and number of leaves) occur with 100% of evapotranspiration, regardless of nitrogen dose and light interception level. Interruption of growth with 95% of incident light and fertilization with 600 kg N ha-1 year-1 promoted greater tillering, number of leaves and leaf length, regardless of the irrigation level. Tanzania grass management with an interruption of growth with 95% of incident light, 600 kg N ha-1 year-1, and irrigation with 80% of actual evapotranspiration led to tillering and number of leaves only 11% lower than the values found in the other treatments irrigated with 100% of actual evapotranspiration. Interruption of growth with 95% of incident light and fertilization with 600 kg N ha-1 year-1 improve the performance of Tanzania grass under deficit irrigation.

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Forage productivity and chemical composition of Panicum maximum cv. Mombaça under defoliations intensities and frequencies

Costa

Jank

Magalhães

et al. 2021

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The effects of defoliation frequency (28, 35, 42 and 49 days) and defoliation intensity (30, 40 and 50 cm above the ground) on green dry matter (GDM) yield, and chemical composition of Panicum maximum cv. Mombaça were evaluated under natural field conditions at the Roraima´s savannas. Defoliation regimes affect productivity and chemical composition of grass forage. The decrease in the pasture defoliation frequency and intensity improved the accumulation of forage, however it reduces the tissue concentrations of N, P, Ca, Mg and K. Irrespective of defoliation frequencies, the highest levels of N (23.99 g kg-1), P (2.12 g kg-1), Ca (4.22 g kg-1), Mg (2.87 g kg-1) and K (21.45 g kg-1) were recorded for the defoliation intensity at 40 cm above the ground. The use of defoliation frequency around 42 days and defoliation intensity of 42,9 cm above the ground can be considered adequate for the management of pastures of P. maximum cv. Mombaça, in order to provides higher forage productivity and quality, regrowth vigor, larger efficiency of forage utilization, greater tissue renewal and canopy structure more favorable to grazing.

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MANEJO ECOFISIOLÓGICO DAS GRAMÍNEAS Megathyrsus maximus (Panicum maximum) cv. TANZÂNIA, MOMBAÇA E MASSAI

Cited by 4 publications

References 15 publications

Evaluation of Natural Regrowth of Axonopus aureus under rest periods in Roraima´s Savannas

Evaluation of Natural Regrowth of Axonopus aureus under rest periods in Roraima´s Savannas

Irrigation management, light interception, and nitrogen in Tanzania grass cultivation

Forage productivity and chemical composition of Panicum maximum cv. Mombaça under defoliations intensities and frequencies

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