Treated sewage effluent as a source of water and nitrogen for Tifton 85 bermudagrass

Autor(es)

Fonseca, Adriel Ferreira da ^[1] ; Melfi, Adolpho Jose ^[2] ; Monteiro, Francisco Antonio ; Montes, Celia Regina ; Almeida, Vagner Vidal de ^[5] ; Herpin, Uwe

Afiliação do(s) autor(es)

^[1] Universidade de São Paulo (USP). Escola Superior de Agricultura Luiz de Queiroz - Brasil

^[2] Universidade de São Paulo (USP). Escola Superior de Agricultura Luiz de Queiroz - Brasil

^[5] Universidade de São Paulo (USP). Escola Superior de Agricultura Luiz de Queiroz - Brasil

• Tipo de documento: Artigo Científico
• Fonte: Agricultural Water Management; v. 87, n. 3, p. 328-336, Feb. 2007.
• Área do conhecimento: Ciências Agrárias - Agronomia
• Assunto(s): Ciclo do nitrogênio Bactérias Azotobacteraceae Plantas Cynodon Efluentes Tratamento de esgotos sanitários Águas residuárias

Resumo

The use of treated sewage effluent in agriculture has been a current practice in several countries. However, in Brazil, there are few studies about this subject. This research work aimed at evaluating the potential utilization of secondary-treated sewage effluent (STSE) as an alternative source of water and nitrogen (N) for Tifton 85 bermudagrass pasture. A field experiment was carried out at Lins, State of Sao Paulo, Brazil, for 2 years, using a randomized complete block design, with four replications and five treatments, as follows: (i) T1 (control) - irrigation with potable water and addition of mineral-N fertilizer (MNF) - 520 kg N ha-1 year-1; (ii) T2-T5 - irrigation with STSE (31.9 mg total-N L1) and addition of MNF - 0, 171.6, 343.2 and 520 kg N ha-1 year-1, respectively. Potable water and STSE characteristics were monitored monthly; above ground grass dry matter yield (DM) and crude protein content (CP) were determined bimonthly. Increases in DM and CP were observed for the high MNF rates associated with irrigation with STSE. STSE irrigation can efficiently substitute potable water for irrigation of Tifton 85 bermudagrass pasture and, simultaneously, save 32.2-81.0% of the recommended N rate without loss of grass DM and CP yield. (AU)

• Processo FAPESP: 02/02390-6 - Impactos químico, físico e ambiental de um sistema solo-pastagem irrigado com efluente de esgoto tratado
• Beneficiário: Adriel Ferreira da Fonseca
• Modalidade de apoio: Bolsas no Brasil - Doutorado
• Processo FAPESP: 02/03242-0 - Impactos quimico, fisico e ambiental de um sistema solo pastagem irrigado com efluentes de esgoto tratado.
• Beneficiário: Adolpho José Melfi
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 03/04631-3 - Dinamica do carbono e do nitrogenio em um latossolo vermelho irrigado com efluente de esgoto tratado.
• Beneficiário: Vagner Vidal de Almeida
• Modalidade de apoio: Bolsas no Brasil - Iniciação Científica