Contribution of mineral N to young grapevine in the presence or absence of cover crops

• Gustavo Brunetto ^[1] ; Felipe Lorensini ^[1] ; Carlos Alberto Ceretta ^[1] ; Paulo Ademar Avelar Ferreira ^[1] ; Rafael da Rosa Couto ^[1] ; Lessandro De Conti ^[1] ; Marlise Nara Ciotta ^[3] ; Matheus Kulmann ^[1] ; Rodrigo Otávio Schneider ^[1] ; Luiza Michelon Somavilla ^[1] ; Tadeu Luis Tiecher ^[1] ; Sandro José Giacomini ^[1] ; George Wellington Bastos de Melo ^[4] ; Corina Luisa Videira de Abreu F. Carranca ^[2]
  1. [1] Universidade Federal de Santa Maria

     Universidade Federal de Santa Maria

     Brasil

     
  2. [2] Instituto Nacional de Investigação Agrária e Veterinária

     Instituto Nacional de Investigação Agrária e Veterinária

     Socorro, Portugal

     
  3. [3] Empresa de Pesquisa Agropecuária e Extensão Rural de Santa Catarina
  4. [4] Embrapa Uva e Vinho

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• Localización: Journal of soil science and plant nutrition, ISSN-e 0718-9516, ISSN 0718-9508, Vol. 17, Nº. 3, 2017, págs. 570-580
• Idioma: inglés
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• Resumen

  • The presence of cover crops in vineyards may decrease the availability of nitrogen (N) derived from fertilizer to grapevines. The present study aimed to evaluate the recovery of urea-15N and growth of young grapevines with and without natural vegetation in plant rows. The study was conducted in southern Brazil on one-year-old Chardonnay grapevines grown in soils with and without cover crops. The grapevines were subjected to the application of 40 kg N ha-1 in the form of urea-15N at 3% 15N atom excess. Dry matter yield, total N and fertilizer N were assessed in grapevines and soil layers. A small amount of N that is applied during the growing season of the grapevines is readily assimilated by the plants. The maintenance of cover crops in young vineyards may favor the maintenance of higher levels of N in the subsurface layers of the soil, contributing to the nutrition of the grapevines in the following growth cycles. The presence of cover crops reduced the importance of nitrogen fertilization in the growth cycle of grapevines because a large part of N absorbed by grapevines was derived from other sources. Nitrogen derived from the fertilizer applied to the soil in the presence or absence of cover crops was mainly concentrated in the newly-formed vegetative grapevine organs (leaves and shoots).