Title:	Nitrogen fertilization (15NH4NO3) of palisadegrass and residual effect on subsequent no-tillage corn.
Authors:	BORGHI, E. CRUSCIOL, C. A. C. TRIVELIN, P. C. O. NASCENTE, A. S. COSTA, C. MATEUS, G. P.
Affiliation:	EMERSON BORGHI, CNPASA; CARLOS ALEXANDRE COSTA CRUSCIOL, UNESP, Bocutatu-SP; PAULO CESAR OCHEUZE TRIVELIN, CENA; ADRIANO STEPHAN NASCENTE, CNPAF; CINIRO COSTA, UNESP, Botucatu-SP; GUSTAVO PAVAN MATEUS, APTA, Andradina-SP.
Date Issued:	2014
Citation:	Revista Brasileira de Ciência do Solo, Viçosa, MG, v. 38, n. 5, p. 1457-1468, set./out. 2014.
Description:	Nitrogen is required in large amounts by plants and their dinamics in corn and perennial forages intercropped is little known. This study analyzed the efficiency of nitrogen fertilization (15NH4NO3) applied after corn grain harvest to palisadegrass (Brachiaria brizantha cv. Marandu) in intercrops sown at two times, as well as the N residual effect on the subsequent corn crop. The field experiment was performed in Botucatu, São Paulo State, in southeastern Brazil, on a structured Alfisol under no-tillage. The experiment was arranged in a randomized block design in a split plot scheme with four replications. The main plots consisted of two intercropping systems (corn and palisadegrass sown together and palisadegrass sown later, at corn top-dressing fertilization). The subplots consisted of four N rates (0, 30, 60, and 120 kg ha-1 N). The subplots contained microplots, in which enriched ammonium nitrate (15NH4NO3) was applied at the same rates. The time of intercrop sowing affected forage dry matter production, the amount of fertilizer-derived N in and the N use efficiency by the forage plants. Nitrogen applied in autumn to palisadegrass intercropped with corn, planted either at corn sowing or at N top-dressing fertilization, increased the forage yield up to a rate of 60 kg ha-1.
Thesagro:	Milho Brachiaria brizantha Plantio direto Sistema de produção Fertilizante nitrogenado
Type of Material:	Artigo de periódico
Access:	openAccess
Appears in Collections:	Artigo em periódico indexado (CNPASA)