Data/hora: 05/06/2024 09:57:34

Biblioteca(s): | Embrapa Meio-Norte.
Data corrente: | 05/09/2012
Data da última atualização: | 18/12/2023
Autoria: | BASTOS, E. A.; CARDOSO, M. J.; SOUSA, R. S. de; ANDRADE JUNIOR, A. S. de; RIBEIRO, V. Q.; BRITO, R. R. de.
Afiliação: | EDSON ALVES BASTOS, CPAMN; MILTON JOSE CARDOSO, CPAMN; RICARDO S. DE SOUSA, UFPI; ADERSON SOARES DE ANDRADE JUNIOR, CPAMN; VALDENIR QUEIROZ RIBEIRO, CPAMN; RAMILOS RODRIGUES DE BRITO, UNESP, Botucatu, SP.
Título: | Productive performance of maize genotypes under water deficit in Teresina, Piauí State, Brazil.
Ano de publicação: | 2012
Fonte/Imprenta: | In: INTERNATIONAL CONFERENCE OF AGRICULTURAL ENGINEERING, 2012, Valencia. Agriculture & engineering for a healthier life: abstracts. Valencia: CIGR: EurAgEng, 2012.
Idioma: | Inglês
Conteúdo: | Maize has a great socio-economic importance in Brazil. However, there are many Brazilians regions that present irregular or low rainfall, reducing drastically the grain yield due to water deficit. Therefore, it is essential to develop studies focused on the evaluation and identification of drought tolerant maize genotypes. Forty-two maize hybrids were evaluated in Teresina, Piauí State, northeastern Brazil, from September to December, 2010, under two irrigation water regimes: no water deficit (NWD) and water deficit (WD) during the reproductive phase, aiming identify genotypes tolerant to drought. The experimental design was randomized blocks with four replications. Irrigation was applied by conventional sprinkler system. Soil moisture content from 0.10 to 1.0 m was measured by Diviner 2000 probe. Grain yield and water use efficiency were evaluated. During the crop cycle irrigation depth plus rainwater were 692 mm and 491 mm for NWD and WD, respectively, implying in maximum soil water depletions of 26% (NWD) and 75% (WD). The water use efficiency was 11.7 kg.ha-1.mm-1 and 4.6 kg.ha-1.mm-1 for NWD and WD, respectively. Under water deficit, the average grain yield was 2,270 kg.ha-¹, i.e. 72 % lower than no water deficit regime (8,058 kg.ha-¹). Moreover, 18 hybrids produced above the average, especially the hybrids ALFA 10 (4,770 kg.ha-¹), 30 A 37 (4,724 kg.ha-¹ ) and BX 1200 (4,562 kg.ha-¹ ).
Palavras-Chave: | Déficit de água; Eficiência do uso da água.
Thesagro: | Zea Mays.
Categoria do assunto: | X Pesquisa, Tecnologia e Engenharia
URL: | http://ainfo.cnptia.embrapa.br/digital/bitstream/item/65630/1/Productive10610001.pdf
Registro original: | Embrapa Meio-Norte (CPAMN)
Exemplares: | CPAMN - (27458-1) - UPC - AA - PP - S 101/12 -  - 2012.00101 - DIS