Succesive applications of sewage sludge in sunflower and residual effect on wheat and triticale/ Aplicacoes sucessivas de lodo de esgoto no girassol e efeito residual no trigo e triticale

• Published in: Revista brasileira de engenharia agrícola e ambiental 2014-09, Vol.18 (9), p.881
• Main Authors: Lobo, Thomaz F, Filho, Helio Grassi, Kummer, Ana C.B
• Format: Article
• Language: Spanish
• Subjects: Fertilizers; Nitrogen; Sludge; Wheat
• ISSN: 1415-4366
• DOI: 10.1590/1807-1929/agriambi.v18n09p881-886

The objective of this study was to evaluate the effect of factors of production within two years of application of sewage sludge on sunflower and its residual effect on productivity of wheat and triticale. The study was conducted for two consecutive years with sunflower cultivation and after harvest of the second year wheat and triticale were sown without the application of sewage sludge fertilization. The experimental design of randomize blocks was adopted consisting of six treatments and five repetitions: T0--without nitrogen fertilization; T1--chemical nitrogen in accordance with Technical Buletin 100. (100% N chemical fertilizers), T2--50% Nitrogen from sewage sludge and 50% in the form of chemical fertilizer, top dressing, T3--100% of nitrogen recommended for the crop, from sewage sludge, T4--150% of nitrogen from sewage sludge; T5--200% of nitrogen from sewage sludge. In the sunflower the sewage sludge promoted a higher grain yield and yield of oil accumulated in the two years of application and did not affect the oil content. In triticale the combination of residual effect of two years with sludge and mineral N fertilization resulted in a greater number of plants and a higher yield. In wheat the best treatment was 150% of the dose of N from sewage sludge residual effect of two applications in sunflower. Key words: sustainability productivity nitrogen Neste trabalho se propos avaliar o efeito da aplicacao do lodo de esgoto durante dois anos sucessivos, na cultura do girassol e seu efeito residual na produtividade do trigo e triticale. Trabalhou-se durante dois anos consecutivos com a cultura do girassol semeando-se, apos a colheita do segundo ano, o trigo e o triticale sem aplicacao de lodo de esgoto. Foi adotado o delineamento experimental em blocos casualizados constituido por 6 tratamentos e 5 repeticoes: T0--sem adubacao com nitrogenio; T1--adubacao quimica nitrogenada de acordo com a necessidade de cultura; T2--50% adubacao nitrogenada proveniente do lodo de esgoto e 50% na forma da adubacao quimica, em cobertura; T3--100% da adubacao nitrogenada do recomendado pela cultura, proveniente do lodo de esgoto; T4 - 150% da adubacao nitrogenada proveniente do lodo de esgoto e T5--200% da adubacao nitrogenada proveniente do lodo de esgoto. No girassol o lodo de esgoto proporcionou maior rendimento de graos e de oleo no acumulado dos dois anos de aplicacao sem, no entanto, interferir no teor de oleo, no triticale nao interferiu no rendimento de graos en