Photosynthetic activity and grape yield of 'Alicante Bouschet' (Vitis vinifera L.) grapevines submitted to nitrogen supply methods and doses

Keywords: fertigation; gas exchange; net photosynthesis; nitrogen fertilization; nutritional status; vineyards.

Abstract

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.

Author Biographies

L. Oliveira Stefanello, Department of Soils, Federal University of Santa Maria, Santa Maria, Brazil

Ph.D. Student in Soil Science

Department of Soils at the Federal University of Santa Maria, Av. Roraima, nº 1000, University City, Camobi, Santa Maria, Rio Grande do Sul, Brazil, 97105-900.

R. Schwalbert, Department of Biology, Federal University of Santa Maria, Santa Maria, Brazil

Ph.D. Student in Agronomy

Department of Biology at the Federal University of Santa Maria, Av. Roraima, nº 1000, University City, Camobi, Santa Maria, Rio Grande do Sul, Brazil, 97105-900.

A. C. Ramos Marques, Department of Soils, Federal University of Santa Maria, Santa Maria, Brazil

Ph.D. in Agronomy

Department of Soils at the Federal University of Santa Maria, Av. Roraima, nº 1000, University City, Camobi, Santa Maria, Rio Grande do Sul, Brazil, 97105-900.

C. Peligrinotti Tarouco, Department of Biology, Federal University of Santa Maria, Santa Maria, Brazil

Ph.D. in Plant health

Department of Biology at the Federal University of Santa Maria, Av. Roraima, nº 1000, University City, Camobi, Santa Maria, Rio Grande do Sul, Brazil, 97105-900.

B. Baticini Vitto, Department of Soils, Federal University of Santa Maria, Santa Maria, Brazil

Undergraduate Student of Forestry Engineering

Department of Soils at the Federal University of Santa Maria, Av. Roraima, nº 1000, University City, Camobi, Santa Maria, Rio Grande do Sul, Brazil, 97105-900.

A. V. Krug, Department of Soils, Federal University of Santa Maria, Santa Maria, Brazil

Master Degree Student in Soil Science

Department of Soils at the Federal University of Santa Maria, Av. Roraima, nº 1000, University City, Camobi, Santa Maria, Rio Grande do Sul, Brazil, 97105-900.

J. P. Jung dos Santos, Department of Soils, Federal University of Santa Maria, Santa Maria, Brazil

Undergraduate Student of Agronomy

Department of Soils at the Federal University of Santa Maria, Av. Roraima, nº 1000, University City, Camobi, Santa Maria, Rio Grande do Sul, Brazil, 97105-900

B. Perez Galarza, Department of Plant Physiology, Federal University of Rio Grande do Sul, Porto Alegre, Brazil

Master in Phytotechnics

Department of Plant Physiology at the Federal University of Rio Grande do Sul, Av. Bento Gonçalves, nº 7712, Agronomy, Porto Alegre, Rio Grande do Sul, Brazil, 91540-000.

J. Zalamena, Federal Institute of Education, Science, and Technology of Rio Grande do Sul, Porto Alegre, Brazil

Ph.D. in Soil Science

Federal Institute of Education, Science, and Technology of Rio Grande do Sul - Restinga Campus, Alberto Hoffmann Street, nº 285, Porto Alegre, Rio Grande do Sul, Brazil, 91791-508

H. Pessoa dos Santos, Embrapa Grape and Wine, Bento Gonçalves, Brazil

Researcher at Embrapa Grape and Wine

Embrapa Grape and Wine, Livramento Street, nº 515, Conceição, Bento Gonçalves, Rio Grande do Sul, Brazil, 95701-008

G. W. Bastos de Melo, Embrapa Grape and Wine, Bento Gonçalves, Brazil

Researcher at Embrapa Grape and Wine

Embrapa Grape and Wine, Livramento Street, nº 515, Conceição, Bento Gonçalves, Rio Grande do Sul, Brazil, 95701-008.

G. Brunetto, Department of Soils, Federal University of Santa Maria, Santa Maria, Brazil

Ph.D. in Soil Science

Department of Soils at the Federal University of Santa Maria, Av. Roraima, nº 1000, University City, Camobi, Santa Maria, Rio Grande do Sul, Brazil, 97105-900.

Published
2020-07-16
Section
Article