Data/hora: 01/06/2024 14:22:31

Biblioteca(s): 	Embrapa Semiárido; Embrapa Unidades Centrais.	
Data corrente: 	15/07/1996	
Data da última atualização: 	11/07/1998	
Autoria: 	SILVA, A. de S.; SILVA, D. A. da; GHEYI, H. R.; PORTO, E. R.	
Título: 	Viability of irrigation by porous capsule method in arid and semi-arid regions.	
Ano de publicação: 	1984	
Fonte/Imprenta: 	Pesquisa Agropecuaria Brasileira, Brasilia, v.19, n.10, p. 1257-1265, out. 1984.	
Idioma: 	Inglês
Português	
Conteúdo: 	This paper presents the results of four field experiments carried out with the objetive of evaluating the feasibility of irrigation by porous capsule method, from 1979 to 1983, at Bebedouro Experiment Station, Embrapa/CPATSA, Petrolina, PE, Brazil. The irrigation system consisted of fulcrum of cone shaped porous capsules, interconnected with conduit pipe and installed in the soil at equidistance and 0.10 m deep along contour lines. The hydrostatic pressures studied (AH=0.35 m to 2.8m) did not significantly influence the crop yield, but influenced, at 0.10 level, the daily water release from porous unit. The mean yields for watermelon (Citrullus vulgaris Schard), var. Charleston Gray, for muskmelon (Cucumis melo L.) var. Valenciano Amarelo, and for maize (Zea mays L.), var. Centralmex, estimated in ton/2.500 units/ha or in cobs/2.500 units/ha, were 28.5, 10 and 17,500, respectively. The water consumption for watermelon, musk melon and maize was, respectively, 60 mm, 60 mm and 100 mm in a deep sandy yellow-red latosol. The cost of the system was US$ 1,677.41/ha.	
Palavras-Chave: 	Capsula porosa; Economia de agua; Irrigacao a baixa pressao; Low pressure irrigation; Nordeste; Northeast; Porous capsule; Regiao semi-arida; Scarce water; Semi-arid region.	
Thesagro: 	Irrigação.	
Thesaurus Nal: 	Brazil; irrigation.	
Categoria do assunto: 	--
X Pesquisa, Tecnologia e Engenharia	
URL: 	http://ainfo.cnptia.embrapa.br/digital/bitstream/item/144272/1/8093-1.pdf	
Registro original: 	Embrapa Unidades Centrais (AI-SEDE)	
Exemplares: 	AI-SEDE - (19995-1) - UMT - AP - -- - 630.72081 - P474 - 63072081 - DIS
CPATSA - (8093-1) - UPC - AP - PP -  -  -  - DIS