| Texto completo | |
| Autor(es): |
Costa Crusciol, Carlos Alexandre
[1]
;
de Almeida Carmeis Filho, Antonio Carlos
[2]
;
Fernandes, Adalton Mazetti
[3]
;
Felix Alvarez, Rita de Cssia
[4]
Número total de Autores: 4
|
| Afiliação do(s) autor(es): | [1] Univ Estadual Paulista, Fac Ciencias Agron, Dept Prod & Melhoramento Vegetal, Campus Botucatu, Botucatu, SP - Brazil
[2] Univ Estadual Paulista, Fac Ciencias Agron, Dept Prod & Melhoramento Vegetal, Programa Posgrad Agron Agr, Campus Botucatu, Botucatu, SP - Brazil
[3] Univ Estadual Paulista, Fac Ciencias Agron, Ctr Raizes & Amidos Tropicais, Campus Botucatu, Botucatu, SP - Brazil
[4] Univ Fed Mato Grosso do Sul, Dept Agron, Chapadao Do Sul, MS - Brazil
Número total de Afiliações: 4
|
| Tipo de documento: | Artigo Científico |
| Fonte: | Revista Brasileira de Ciência do Solo; v. 40, 2016. |
| Citações Web of Science: | 0 |
| Resumo | |
ABSTRACT 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. (AU) | |
| Processo FAPESP: | 01/03323-8 - Marcha de absorcao de nutrientes por cultivares dos grupos moderno, intermediario e tradicional de arroz de terras altas. |
| Beneficiário: | Thiago Paiva Moreira |
| Modalidade de apoio: | Bolsas no Brasil - Iniciação Científica |