Data/hora: 22/06/2024 02:00:30

Biblioteca(s): | Embrapa Arroz e Feijão.
Tipo da produção científica: | Artigo em Periódico Indexado
Circulação/Nível: | A - 1
Data corrente: | 20/12/2012
Data da última atualização: | 03/05/2019
Autoria: | CRUSCIOL, C. A. C.; SORATTO, R. P.; NASCENTE, A. S.; ARF, O.
Afiliação: | CARLOS ALEXANDRE COSTA CRUSCIOL, UNESP, Botucatu-SP; R. P. SORATTO, UNESP, Botucatu-SP; ADRIANO STEPHAN NASCENTE, CNPAF; ORIVALDO ARF, UNESP, Ilha Solteira-SP.
Título: | Root distribution, nutrient uptake, and yield of two upland rice cultivars under two water regimes.
Ano de publicação: | 2013
Fonte/Imprenta: | Agronomy Journal, Madison, v. 105, n. 1, p. 237-246, 2013.
Idioma: | Inglês
Conteúdo: | Upland rice (Oryza sativa L.) cultivation has been increasing in global importance due to the decreasing water availability for flood irrigated rice. The use of sprinkler irrigation to supplement rainfall and the identification of cultivars more adapted to lower water availability could be effective alternatives for producing upland rice without yield losses while using less water. Th e objective of this field study was to evaluate the root distribution, plant nutrition, and grain yield of two drought tolerant upland rice cultivars under two water regimes in the Cerrado Region of Brazil during two growing seasons. The main plots were two water regimes (rainfed and sprinkler-irrigation plus rainfall). Subplots were two upland rice cultivars Carajás and IAC 201. Low water availability reduced root growth by 7% and grain yields were from 2644 to 4002 kg ha?1 on average for rainfed and sprinkler irrigation treatments, respectively. Carajás had a significantly better root distribution, nutrient uptake, and higher grain yield (3732 kg ha?1) compared with IAC 201 (2914 kg ha?1) averaged over two growing seasons and water regimes. There were no treatment interactions. Our results suggest that, even when cultivars with a higher tolerance to less water availability are used, using sprinkler irrigation to augment limited rainfall during dry periods may be a viable method to increase upland rice grain yields.
Thesagro: | Água; Arroz; Crescimento; Nutriente; Oryza sativa; Raíz; Solo.
Thesaurus Nal: | Rice; Root growth; Soil water regimes.
Categoria do assunto: | F Plantas e Produtos de Origem Vegetal
Registro original: | Embrapa Arroz e Feijão (CNPAF)
Exemplares: | CNPAF - (31801-1) - UPC - AP - PP - 2013.003 -  - 2013.003 - DIS