Irrigation with domestic treated sewage and nitrogen fertilizing in sunflower cultivation

Engenharia Agrícola

Francicso M. L. Bezerra²  Cley A. S. De Freitas¹  Alexandre R. A. Da Silva¹  Suetônio De B. Mota¹  Boanerges F. De Aquino¹ 

[1] ,UFC Departamento de Engenharia Agrícola Fortaleza Ceará ,Brasil

关键词: Helianthus annuus;    recycle;    drip irrigation;    nitrogen fertilization;    Helianthus annuus;    reúso;    gotejamento;    adubação nitrogenada;   

DOI  :  10.1590/S0100-69162014000600014

来源: SciELO

【 摘 要 】

The objective of this study was to evaluate the productive performance of sunflower plants irrigated with different levels of domestic treated sewage and groundwater well with different doses of nitrogen. It was used randomized blocks design in split-split plots with four replications. In the plots, we evaluated the effect of two types of irrigation water, in the subplots we evaluated the five irrigation levels expressed as 25, 50, 75, 100 and 125% of the Class A pan Evaporation (CAE), and in the sub subplots, we evaluated the effect of four different doses of nitrogen (25, 50, 75 and 100 kg ha-1). The irrigation of sunflower with domestic sewage produced greater yield potential of grain and oil. The use of water from treated wastewater can replace up to 50 kg N ha-1 without affecting productivity. It is recommended for the commercial production of sunflower the use of treated sewage water with irrigation depth relative to 100% of CAE (296.64 mm) and nitrogen of 25 kg ha-1.

【 授权许可】

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