Tolerance of &amp;lt;i&amp;gt;Urochloa brizantha&amp;lt;/i&amp;gt; cv. MG5 to Mn Toxicity

Santos, Valéria Regina Cavalcante dos; Caione, Gustavo; Souza, Luiz Felipe Gevenez de; Prado, Renato de Mello; Wamser, Anderson Fernando

doi:10.4236/ojss.2013.38044

Cited by 2 publications

(2 citation statements)

References 16 publications

(11 reference statements)

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“…Also in rice cultivars, Fageria et al (2008) found a reduction in the leaves and roots dry mass as the concentration of Fe increased. Treatments SDM RDM TDM ----------------------g plant -1 --------------------Adequate Fe and Mn 9.12 a 2.17 Cavalcante et al (2013), evaluating the tolerance of cv. MG5 to the toxicity of manganese (0, 15, 30, 60 and 120 mg dm -3 ) observed that the shoot dry matter of the grass showed reduction in the second cut of the grass; however, for root dry matter there were no symptoms of reduction; nonetheless, the plants showed reductions in all variables evaluated.…”

Section: Resultsmentioning

confidence: 99%

Tolerance of Marandu Grass to Excess Iron and Manganese

Caione

Campos

Kume

et al. 2023

Rev. Agric. Neotrop.

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In soaked soils there is an increase in the availability of iron and manganese. Thus, it becomes important to investigate the tolerance levels of plants to excess of these nutrients. The objective was to evaluate the tolerance of Urochloa brizantha cv. Marandu cultivated in nutrient solution with different levels of iron and manganese. The experimental design was completely randomized with seven treatments and four replications. The treatments consisted of a nutrient solution and consisted of: 1- adequate concentration of Fe (8.22 mM) and Mn (2.05 mM); 2– Fe, four times the adequate concentration; 3– Fe, eight times the adequate concentration; 4– Mn, four times the adequate concentration; 5– Mn, eight times the adequate concentration; 6– Fe and Mn, four times the appropriate concentration, and; 7– Fe and Mn, eight times the appropriate concentration. The variables evaluated were visual diagnosis (symptomatology), shoot height, root volume, Fe and Mn content in shoots and dry mass production. Grass plants were not tolerant to excess Fe and Mn. The excess of nutrients promoted less development of the root system, with a reduction in volume and dry mass, and the treatment with the highest dose of nutrients resulted in the lowest values. Grass plants were sensitive to the increase in nutrient concentrations, showing reductions in total dry mass production of 55% for treatment with the application of the highest concentration of nutrients in relation to the adequate dose of Fe and Mn.

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Section: Resultsmentioning

confidence: 99%

Tolerance of Marandu Grass to Excess Iron and Manganese

Caione

Campos

Kume

et al. 2023

Rev. Agric. Neotrop.

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“…The Mn 2+ content in the shoot at the second cut showed quadratic adjustment due to the application of Mn 2+ increasing rates, with the maximum content of 568.74 mg kg -1 obtained with 81.64 mg dm -3 (Fig 2). Cavalcante et al (2013) found plants of Urochloa brizantha cv. MG5 not showing significant effects at the second cut, when subjected to Mn similar rates used in this study.…”

Section: + Content In Roots and Shootmentioning

confidence: 99%

Manganese accumulation and dry matter production of Guinea Grass (Panicum maximum) after application of increasing doses of Mn fertilizer

Flores¹,

Damin²,

Mascarenhas³

et al. 2017

Aust J Crop Sci

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The manganese (Mn) is an important nutrient to forage development; however, there is a lack of information regarding to adequate Mn-fertilizer rates for Guinea Grass (Panicum maximum) species growing in Brazilian soils. The objective of this research was to evaluate the effect of Mn on growth, nutrition and yield of Guinea Grass. The study was carried out under greenhouse conditions in a randomized block design, with five Mn rates (0, 15, 30, 60 and 120 mg dm -3 ) and four replicates, using manganese sulfate (35.5% Mn) as Mn source. Plant's growth parameters, dry mass production, Mn 2+ levels and accumulation in plant's tissues were measured and Mn efficiencies of absorption, transport and utilization were calculated. Enhancing Mn doses, there was a proportional increase of Mn 2+ levels in the leaves and the roots. Regarding to the growth parameters, the number of leaves and both root and aboveground dry mass were slightly affected by Mn application. The highest Mn efficiency of absorption and transport by Guinea Grass was ob using 30 mg dm -3 of Mn; however, the Mn utilization efficiency was higher when Mn was not applied. In this way, the Mn fertilization in Guinea Grass is economically viable using doses up to 30 mg dm -3 .

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Tolerance of <i>Urochloa brizantha</i> cv. MG5 to Mn Toxicity

Cited by 2 publications

References 16 publications

Tolerance of Marandu Grass to Excess Iron and Manganese

Tolerance of Marandu Grass to Excess Iron and Manganese

Manganese accumulation and dry matter production of Guinea Grass (Panicum maximum) after application of increasing doses of Mn fertilizer

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