Data/hora: 26/05/2024 01:55:14

Biblioteca(s): 	Embrapa Semiárido.	
Data corrente: 	19/08/1996	
Data da última atualização: 	10/04/2024	
Autoria: 	SILVA, D. A. da; CARVALLO, H. O.; SILVA, A. de S.; GHEYI, H. R.	
Afiliação: 	DINARTE AEDA DA SILVA, UNIVERSIDADE FEDERAL DO RIO GRANDE DO NORTE; HUGO O. CARVALLO, UNIVERSIDADE FEDERAL DA PARAÍBA; ADERALDO DE SOUZA SILVA, CPATSA; H. R. GHEYI, UNIVERSIDADE FEDERAL DA PARAÍBA.	
Título: 	Irrigation by porous capsule method under hidrostatic pressure.	
Ano de publicação: 	1982	
Fonte/Imprenta: 	Petrolina: EMBRAPA-CPATSA, 1982.	
Páginas: 	26 p.	
Idioma: 	Inglês	
Conteúdo: 	A field experiment was contucted at an Experiment Station of EMBRAPA in Pernambuco, Brazil with the objectives to evaluate the technical feasibility of irrigation by porous capsule under hydrostatic presure and to determine the effect of plant population on corn production. The experiment tested hydrostatic pressures of 0.35, 0.50 and 0.70 m and corn populations of 1, 4, 7, 10 and 13 plants/capsule with three replicates in a randomized block design. Each replicate consisted of 10 capsules installed at 0.25 m deep along the contour lines with absolutely no slope. The hydrostatic pressure significantly influenced water release from the capsule. Total water consumption varied from 7.96 to 10 cm/ha thereby indicating the extent of water saving. The hydrostatic pressure did no affect production significantly but the differences due to plant population were significant at 0.01 leyel. A second degree quadratic equation described satisfactorily the yield curve and estimated that 9 plants/capsule would give the best grain production. In the present wtudy 7 plantas/capsule gave the highest production with a water use efficiency of 2.0 kg/m3, which compared to conventional methods of irrigation is rather high.	
Palavras-Chave: 	Capsula porosa; Irrigação não convencional.	
Thesagro: 	Água; Irrigação; Pressão Hidrostática.	
Thesaurus Nal: 	irrigation; water.	
Categoria do assunto: 	X Pesquisa, Tecnologia e Engenharia	
URL: 	http://ainfo.cnptia.embrapa.br/digital/bitstream/item/179475/1/FL-01343.pdf	
Registro original: 	Embrapa Semiárido (CPATSA)	
Exemplares: 	CPATSA - (8125-1) - UMT - FL - PP - 01343 -  - 01343 - DIS