| Registro completo |
| Provedor de dados: |
Agronomy
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| País: |
Brazil
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| Título: |
Phosphorus uptake and use efficiency of different cotton cultivars in savannah soil (Acrisol)
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| Autores: |
Marcante, Nericlenes Chaves
Muraoka, Takashi
Bruno, Isabeli Pereira
Camacho, Marcos Antonio
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| Data: |
2016-04-01
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| Ano: |
2016
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| Palavras-chave: |
G. barbadense
G. hirsutum
Brazilian Cerrado 32P activity
G. barbadense
G. hirsutum
Brazilian Cerrado
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| Resumo: |
Low soil phosphorus (P) is a limiting factor for plant growth in the Brazilian savannah, where P diffuses slowly and has a high fixation rate in soil (as Al-P and Fe-P). In this study, we investigated the variation in P uptake by different cotton cultivars grown in savannah soil. We conducted a greenhouse experiment using a fully factorial 2 x 17 randomized design with two P treatments (low P = 20 mg kg-1 and high P = 120 mg kg-1) and 17 cotton cultivars. The plants were potted in Acrisol soil labeled with radioisotope 32P. There was genetic variation in the P use efficiency among the cotton cultivars. The P treatments significantly influenced the dry weight of shoots (DWS), P accumulation, the specific activity of 32P, and the L-value (both the standardized and L-values discounted the P present in the cottonseed). Hierarchical clustering analysis classified the cotton cultivars into distinct, internally homogeneous clusters. Our results suggest that cotton cultivars could be selected to maximize P absorption efficiency in conditions of low plant-available P. The cultivars FMT 523, FM 910 and CNPA GO 2043 were the most responsive to P fertilization, while Barbadense 01, FM 966LL, IPR Jataí, BRS Aroeira and BRS Buriti were most efficient at absorbing plant-available P.
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| Tipo: |
Info:eu-repo/semantics/article
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| Idioma: |
Inglês
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| Identificador: |
http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/26551
10.4025/actasciagron.v38i2.26551
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| Editor: |
Universidade Estadual de Maringá
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| Relação: |
http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/26551/pdf_132
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| Formato: |
application/pdf
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| Fonte: |
Acta Scientiarum. Agronomy; v. 38, n. 2 (2016); 239-247
Acta Scientiarum. Agronomy; v. 38, n. 2 (2016); 239-247
1807-8621
1679-9275
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