Doses e modos de adubação com manganês e seus efeitos na produção da cultura do arroz

Pereira, Gabriel de Assis; Bertoni, J. C.; Carvalho, Janice Guedes de; Morais, A. R. de

doi:10.1590/s0100-06832001000300011

Cited by 9 publications

(8 citation statements)

References 5 publications

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“…Adding Mn to soil, Pereira et al (2001) found that its levels in leaves of rice cultivars increased quadratically in response to higher rates. Similar results were found for guava (Salvador et al, 2003) and soybean (Oliveira Júnior et al, 2000).…”

Section: Response To Mnmentioning

confidence: 99%

Rice grown in nutrient solution with doses of manganese and silicon

Júnior

Fontes

Neves

et al. 2010

Rev. Bras. Ciênc. Solo

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SUMMARYAlthough silicon is not recognized as a nutrient, it may benefit rice plants and may alleviate the Mn toxicity in some plant species. The dry matter yield (root, leaf, sheaths and leaf blade) and plant architecture (angle of leaf insertion and leaf arc) were evaluated in rice plants grown in nutrient solutions with three Mn doses, with and without Si addition. The treatments were arranged in a 2 x 3 factorial [with and without (2 mmol L -1 ) Si; three Mn doses (0.5; 2.5 and 10 μmol L -1 )], in a randomized block design with 4 replications. The experimental unit was a 4 L plastic vase with 4 rice (Metica-1 cultivar) plants. Thirty nine days after keeping the seedlings in the nutrient solution the plant dry matter yield was determined; the angle of leaf insertion in the sheath and the leaf arc were measured; and the Si and Mn concentrations in roots, sheaths and leaves were determined. The analysis of variance (F test at 5 and 1 % levels) and the regression analysis (for testing plant response to Mn with the Si treatments) were performed. The Si added to the nutrient solution increased the dry matter yield of roots, sheaths and leaf blades and also decreased the angle of leaf blade insertion into the sheath and the foliar arc in the rice plant. Additionally, it ameliorated the rice plant architecture which allowed an increase in the dry matter yield. Similarly, the addition of Mn to the solution improved the architecture of the rice plants with gain in dry matter yield. As Si was added to the nutrient solution, the concentration of Mn in leaves decreased and in roots increased thus alleviating the toxic effects of Mn on the plants.Index terms: Oryza sativa, mineral plant nutrition, beneficial element.

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Section: Response To Mnmentioning

confidence: 99%

Rice grown in nutrient solution with doses of manganese and silicon

Júnior

Fontes

Neves

et al. 2010

Rev. Bras. Ciênc. Solo

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“…Most studies of manganese are con-cerned to toxicity. In recent years, however, the cases of Mn deficiency have appeared in several crops grown in "cerrado" soils, such as soybean (Abreu et al, 1996;Oliveira Jr. et al, 2000;Mann et al, 2001), cotton (Rosolem & Ferelli, 2000), rice (Pereira et al, 2001), and bean Kikuti et al, 1998). For soybean, the application of Mn on deficient soils is recommended, and a rate of 350 g ha -1 via leaves is preconized (Embrapa, 2001).…”

Section: Introductionmentioning

confidence: 99%

Manganese and zinc leaf application on common bean grown on a "Cerrado" soil

Teixeira¹,

Borém²,

Araújo³

et al. 2004

Sci. agric. (Piracicaba, Braz.)

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The occurrence of micronutrient deficiencies, mainly of manganese (Mn) and zinc (Zn) in "cerrado" soils, has been increasing in several crops, including bean. Such a problem is caused by high rates of liming material applied entirely on the soil surface. In this study, the effects of the leaf application of Mn and Zn rates were evaluated. Three experiments were carried out: two in greenhouse and one under field conditions. The greenhouse experiments were set up using a randomized block design and a 5 x 5 factorial, with three replicates, consisting of five rates of Mn (0, 75, 150, 300, and 600 g ha -1 ) and five rates of Zn (0, 50, 100, 200, and 400 g ha -1 ) applied via leaves at the 25 th day, or both alternatively parceled at 25 and 35 days after emergency (DAE), respectively, for the first and second experiments. In the field experiment, a randomized block design was used with four replicates, and the same treatments as those used in the greenhouse. Leaf applications performed at 25 and 35 DAE were efficient in correcting the symptoms of the Mn and Zn deficiencies. The combined application of Mn and Zn caused an increase in plant height, primary yield components as number of grains per pod, number of pods per plant, and productivity itself.

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“…The Mn content in the soil increased (quadratic model) as a function of the Mn doses applied, with and without the addition of Si (Figure 1). The result was an increase Mn availability to plants which allowed a greater plant uptake and a higher Mn content in leaves and roots, as found by PEREIRA et al (2001) in rice plants supplied with Mn in greenhouse. In the plant, the Mn content in the leaves increased linearly in the -Si soil, and quadratically, with more discrete increments in the +Si soil, as a function of Mn dose raising (Figure 1).…”

Section: O Objetivo Deste Trabalho Foi Avaliar a Produção De Biomassamentioning

confidence: 73%