Dinâmica das formas de fósforo em solos de textura e mineralogia contrastantes cultivados com arroz

Tokura, Alessandra Mayumi; Neto, Antônio Eduardo Furtini; Carneiro, Leandro Flávio; Curi, Nilton; Santos, José Zilton Lopes; Alovisi, Alves Alexandre

doi:10.4025/actasciagron.v33i1.1435

Cited by 54 publications

(42 citation statements)

References 11 publications

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“…This can probably be attributed to P transformation into more stable forms, not accessed by these extractors, as well as by P migration to deeper soil layers, especially because the soils have a sandy texture and low Fe oxide content (Table 1). It is also worth mentioning that the results of soil P extracted by anion-exchange resin and by 0.5 mol L -1 NaHCO 3 are similar to results published in other studies (Herlihy & McGrath, 2007;Boschetti et al, 2009;Tokura et al, 2011) which also used P chemical fractionation and reported that the contents of these two fractions increase with the dose of soluble phosphate fertilizers applied over time. It should also be mentioned that the P contents extracted by anionexchange resin in the 0-5 cm layer of both vineyards were considered high (> 20 mg kg -1 ) (CQFSRS/SC, 2004).…”

Section: Phosphorus Fractionssupporting

confidence: 78%

“…In soils growing annual crops under long-term, successive phosphate applications, organic and inorganic P fractions are accumulated in the soil at different degrees of binding energy, although the accumulation of the inorganic fractions is generally most pronounced (Negassa et al, 2009;Linquist et al, 2011;Tokura et al, 2011). Few studies on P accumulation in vineyard soils after long-term nutrient application have been published in the international literature and none in Brazil.…”

Section: Introductionmentioning

confidence: 99%

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Phosphorus fractions in sandy soils of vineyards in southern Brazil

Schmitt

Comin

Gatiboni

et al. 2013

Rev. Bras. Ciênc. Solo

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SUMMARYPhosphorus (P) applications to vineyards can cause P accumulation in the soil and maximize pollution risks. This study was carried out to quantify the accumulation of P fractions in sandy soils of vineyards in southern Brazil. Soil samples (layers 0-5, 6-10 and 11-20 cm) were collected from a native grassland area and two vineyards, after 14 years (vineyard 1) and 30 years (vineyard 2) of cultivation, in Santana do Livramento, southern Brazil, and subjected to chemical fractionation of P. Phosphorus application, especially to the 30-year-old vineyard 2, increased the inorganic P content down to a depth of 20 cm, mainly in the labile fractions extracted by anion-exchange resin and NaHCO 3 , in the moderately labile fraction extracted by 0.1 and 0.5 mol L -1 NaOH, and in the non-labile fraction extracted by 1 mol L -1 HCl, indicating the possibility of water eutrophication. Phosphorus application and grapevine cultivation time increased the P content

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Section: Phosphorus Fractionssupporting

confidence: 78%

Section: Introductionmentioning

confidence: 99%

Phosphorus fractions in sandy soils of vineyards in southern Brazil

Schmitt

Comin

Gatiboni

et al. 2013

Rev. Bras. Ciênc. Solo

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“…Esses resultados estão de acordo com os obtidos por Tokura et al (2011), os quais citam que o Si é o elemento absorvido em maior quantidade por plantas de arroz. Isso ocorre, provavelmente, devido à alta densidade de transportadores de Si no sistema radicular dessas plantas (Mitani & Ma 2005.…”

Section: Cultivaresunclassified

“…Além disso, plantas de arroz são altamente eficientes na absorção e acúmulo de silício (Si) em seus tecidos (Tokura et al 2011). O Si é considerado um elemento benéfico, uma vez que é capaz de proteger 1.…”

Section: Introductionunclassified

Silício na nutrição mineral e acúmulo de alumínio em plantas de arroz de terras altas

Freitas

Fernandes

Maia

2015

Pesqui. Agropecu. Trop.

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RESUMO O silício é capaz de proteger as plantas contra vários estresses bióticos e abióticos, entre eles o estresse por alumínio. No entanto, a interação entre silício e alumínio ainda é pouco conhecida, sendo que há diversas hipóteses para justificar o papel do silício na amenização do estresse causado por alumínio. Objetivou-se avaliar o efeito da aplicação de silício nos teores e acúmulos de macro e micronutrientes, alumínio e silício na parte aérea de plantas de arroz de terras altas cultivadas sob estresse por alumínio, bem como as características químicas do solo após a colheita. O delineamento experimental utilizado foi o de blocos casualizados, disposto em modelo fatorial 2 x 5, com quatro repetições. Os tratamentos consistiram de duas cultivares de arroz de terras altas (BRS Talento - não tolerante ao alumínio; Guarani - tolerante ao alumínio) e cinco doses de silício (0 mg dm-3, 30 mg dm-3, 60 mg dm-3, 90 mg dm-3 e 120 mg dm-3). O silício aplicado aumenta o teor de silício na planta e no solo e diminui o teor de alumínio na parte aérea, porém, não incrementa a absorção de macro e micronutrientes e não altera o teor de alumínio e pH do solo.

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“…Rice plants that are deficient in copper (Cu) exhibit chlorotic leaves with less tillering and lower viability of pollen grains (Das, 2014). Silicon (Si), although not considered essential (Epstein, 1994), is one of the nutrients that is most taken up by the rice plant (Tokura et al, 2011), such that when plants are grown in the absence of Si, DM accumulation in the grain is cut in half (Ma et al, 1989). …”

Section: Introductionmentioning

confidence: 99%

Micronutrient and Silicon Uptake and Removal by Upland Rice Cultivars with Different Plant Architecture

Crusciol

Filho

Fernandes

et al. 2016

Rev. Bras. Ciênc. Solo

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Upland rice cultivars manifest different nutritional demands. A field study was conducted to quantify the extraction, distribution, and removal of micronutrients and silicon by the upland rice cultivars. The experiment was arranged in a randomized complete block-split plot design. Plots consisted of three cultivars (Caiapó -traditional, BRS Primavera -intermediate, and Maravilha -modern) of upland rice. Split-plots consisted of plant samplings, which occurred at 39, 46, 55, 67, 75, 83, 92, 102, 111, 118, and 125 days after emergence (DAE). Up to the end of tillering (46 DAE), all cultivars exhibited low demand for most micronutrients and Si, and took up less than 24 % of the total B, Cu, and Si, but around 31 % of the total Zn. The period of greatest uptake of micronutrients and Si occurred from 65 to 80 DAE in the Caiapó and BRS Primavera cultivars, and after 80 DAE in the Maravilha cultivar. The Caiapó and BRS Primavera cultivars took up their necessary demand of B, Mn, and Fe in the first 98 DAE and Cu, Zn, and Si up to 105 DAE, but the Maravilha cultivar took up these nutrients for two to three weeks longer. The quantities of micronutrients and Si taken up by cultivars Caiapó, BRS Primavera, and Maravilha did not exhibit large differences, and these cultivars took up between 98-135 g B, 103-110 g Cu, 1,157-1,460 g Fe, 1,278-1,424 g Mn, 240-285 g Zn, and 111-124 kg Si per hectare. The BRS Primavera cultivar showed greater removal of nutrients, with average amounts per hectare of 19.7 g B, 25.8 g Cu, 200 g Fe, 234.2 g Mn, 102.4 g Zn, and 32.6 kg Si, while the other cultivars removed smaller amounts per hectare (14.4 g B, 19.9 g Cu, 160.7 g Fe, 136.3 g Mn, 67 g Zn, and 21.9 kg Si). The BRS Primavera showed a greater removal of nutrients because it has a higher yield and allocates a greater quantity of nutrients to the panicles.

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Dinâmica das formas de fósforo em solos de textura e mineralogia contrastantes cultivados com arroz

Cited by 54 publications

References 11 publications

Phosphorus fractions in sandy soils of vineyards in southern Brazil

Phosphorus fractions in sandy soils of vineyards in southern Brazil

Silício na nutrição mineral e acúmulo de alumínio em plantas de arroz de terras altas

Micronutrient and Silicon Uptake and Removal by Upland Rice Cultivars with Different Plant Architecture

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