Data/hora: 25/06/2024 00:17:51

Biblioteca(s): 	Embrapa Algodão.	
Data corrente: 	22/10/2015	
Data da última atualização: 	17/03/2016	
Autoria: 	ZONTA, J. H.; BEZERRA, J. R. C.; SOFIATTI, V.; BRANDAO, Z. N.	
Afiliação: 	JOAO HENRIQUE ZONTA, CNPA; JOSE RENATO CORTEZ BEZERRA, CNPA; VALDINEI SOFIATTI, CNPA; ZIANY NEIVA BRANDAO, CNPA.	
Título: 	Yield of cotton cultivars under different irrigation depths in the Brazilian semi-arid region.	
Ano de publicação: 	2015	
Fonte/Imprenta: 	Revista Brasileira de Engenharia Agrícola e Ambiental, Campina Grande, PB, v. 19, n. 8, p.748-754, 2015.	
ISSN: 	1807-1929	
Idioma: 	Inglês	
Conteúdo: 	The objective of this study was to evaluate the effect of irrigation depths on seed cotton yield and water-use efficiency of cotton cultivars in the Brazilian semi-arid region. Field experiment was conducted during two consecutive years in the Apodi region, RN, using sprinkler irrigation. The experiment consisted of factorial combination in split-plots, composed of four irrigation depths (130; 100; 70 and 40% ETc and four cotton cultivars - FiberMax 993, BRS 286, BRS 336 and BRS 335), in randomized block design with 4 replicates. Data were evaluated by mean test (Tukey) and regression analysis. Considering the irrigation depths of 40% ETc, cotton yield was 48% lower compared to the higher irrigation depth (130% ETc). The higher water-use efficiency (0.69 kg m-3) was obtained with 70% ETc irrigation depth. The highest seed cotton yield was achieved with the higher water depth for all evaluated cultivars. Yield response factor (Ky) was equal to 0.632, 0.711, 0.784 and 0.858, for FiberMax 993, BRS 286, BRS 335 and BRS 336 cultivars, respectively. FiberMax 993 and BRS 286 cultivars presented the best performance, showing that they are more suitable for irrigated farming in the semi-arid region.	
Palavras-Chave: 	Défict hídrico.	
Thesagro: 	Algodão; Evapotranspiração; Gossypium hirsutum; Irrigação por aspersão.	
Categoria do assunto: 	--	
URL: 	http://ainfo.cnptia.embrapa.br/digital/bitstream/item/131643/1/agriambi.zonta.pdf	
Registro original: 	Embrapa Algodão (CNPA)	
Exemplares: 	CNPA - (28057-1) - UPC - AP - DD -  -  -  - DIS