Título:	Photosynthetic activity and grape yield of 'Alicante Bouschet' (Vitis vinifera L.) grapevines submitted to nitrogen supply methods and doses.
Autoria:	STEFANELLO, L. O. SCHWALBERT, R. MARQUES, A. C. R. TAROUCO, C. P. VITTO, B. B. KRUG, A. V. SANTOS, J. P. J. dos GALARZA, B. P. ZALAMENA, J. SANTOS, H. P. dos MELO, G. W. B. de BRUNETTO, G.
Afiliação:	LINCON OLIVEIRA STEFANELLO, Department of Soils, Federal University of Santa Maria, Santa Maria, Brazil; RAÍSSA SCHWALBERT, Department of Biology, Federal University of Santa Maria, Santa Maria, Brazil; ANDERSON CESAR RAMOS MARQUES, Department of Soils, Federal University of Santa Maria, Santa Maria, Brazil; CAMILA PELIGRINOTTI TAROUCO, Department of Biology, Federal University of Santa Maria, Santa Maria, Brazil; BEATRIZ BATICINI VITTO, Department of Soils, Federal University of Santa Maria, Santa Maria, Brazil; AMANDA VERIDIANA KRUG, Department of Soils, Federal University of Santa Maria, Santa Maria, Brazil; J. P. JUNG DOS SANTOS, Department of Soils, Federal University of Santa Maria, Santa Maria, Brazil; BIBIANA PEREZ GALARZA, Department of Plant Physiology, Federal University of Rio Grande do Sul, Porto Alegre, Brazil; JOVANI ZALAMENA, Federal Institute of Education, Science, and Technology of Rio Grande do Sul, Porto Alegre, Brazil; HENRIQUE PESSOA DOS SANTOS, CNPUV; GEORGE WELLINGTON BASTOS DE MELO, CNPUV; GUSTAVO BRUNETTO, Department of Soils, Federal University of Santa Maria, Santa Maria, Brazil.
Ano de publicação:	2020
Referência:	Vitis, v. 59, p. 133-140, 2020.
Conteúdo:	The great majority of sandy soils present low nitrogen availability, generally below vines physiological demand, and therefore nitrogen fertilizer application, such as urea, is necessary. However, when urea is applied on the soil surface, the vine can use only a small amount of N. Thus, management strategies such as fertigation can increase N utilization by vine, reflecting in a greater photosynthetic activity and grape yield. The objective of this study was to evaluate the influence of nitrogen supply methods and doses on photosynthetic activity and grape yield of 'Alicante Bouschet' grapevines cultivated in sandy soil. The experiment was carried out in Santana do Livramento, in the southern region of Brazil, in a vineyard planted in 2011. The cultivar was 'Alicante Bouschet' grafted on '1103 Paulsen'. The experimental design was of randomized blocks in a bifactorial arrangement (dose x method). The N source used was urea (45 % N). The 0, 20, 60 and 100 kg N·ha-1 doses were applied on the soil surface, without irrigation (NWI) and via fertigation (NF). Photosynthetic activity, N concentration in leaves and grape yield during two growing seasons were evaluated. The application of N doses in soil increased N concentration in grapevine leaves by up to 53 % in NF and 18 % in NWI methods but did not affect yield. Strong correlations between yield and water use efficiency were also observed, evidencing a certain synchronism between the physiological demand of the grapevine and the offer of the adequate N dose by a more efficient method.
NAL Thesaurus:	Fertigation Gas exchange Nutritional status Vineyards
Palavras-chave:	Net Photosynthesis Nitrogen Fertilization
Digital Object Identifier:	10.5073/vitis.2020.59.133-140
Tipo do material:	Artigo de periódico
Acesso:	openAccess
Aparece nas coleções:	Artigo em periódico indexado (CNPUV)