Immobilization and nutrient uptake in ‘early isabella’ grapevines grafted on different rootstocks in organic management

Abstract

This study evaluated the immobilization and nutrient uptake in an experimental organic vineyard of 'Early Isabella' grapevines in the Midwestern region of Parana State, Brazil. The experimental design was implemented in randomized blocks with two different rootstocks 'Paulsen 1103' and 'VR 043-43' along with four replications and three plants per plot. Five years after planting, one plant per plot was completely removed from the soil and then subdivided into root, stem and canes. The remaining plants in the area were managed until harvest. The sectioned parts and clusters were dried in a forced air oven at 65°C. The dry mass was subsequently determined and mineral analyses were performed. The amounts of nutrient uptake immobilized by 'Early Isabella' grapevines with yields between 9.9 and 16.6 t ha -1 were 64.9, 19.0, 156.9, 45.8 and 12.7 kg ha -1 for N, P, K, Ca, Mg, respectively, when grafted on Paulsen '1103 ' and 112.8, 29.3, 260.8, 82.3 ResumoO objetivo do trabalho foi avaliar a imobilização e extração de macronutrientes em um vinhedo experimental de cultivo orgânico de videiras cv. Isabel Precoce na região Centro-Oeste do Paraná. O delineamento experimental foi em blocos casualizados, com dois tratamentos (porta-enxertos: Paulsen '1103' e 'VR 043-43'), quatro repetições e três plantas por parcela. Cinco anos após o plantio, uma planta por parcela foi totalmente removida do solo, sendo que posteriormente as videiras foram subdivididas em três partes: raiz, caule e ramos do ano. A partir das plantas remanescentes no campo, realizou-se a colheita dos cachos. Para as avaliações, as plantas e os cachos foram secos em estufa de ar forçado a 65°C. Posteriormente, determinou-se a massa seca e se realizaram análises do teor dos macronutrientes dos tecidos vegetais Pelos resultados obtidos, verificou-se que as quantidades de nutrientes imobilizadas e exportadas pela videira cv. Isabel Precoce com produtividade entre 9,9 e 16,6 t ha -1 , em função do porta-enxerto foram para N, P, K, Ca, Mg, respectivamente de 64,9; 19,0; 156,9; 45,8

Nutrient uptake in ‘Venus’ grape vine grafted onto different rootstocks during two growing seasons

“…In 'Isabel Precoce' grape vines grafted on 'VR 043-43' rootstock, the descending order confirms this study data for macronutrients. However, 'Paulsen 1103' rootstock, reversed P and Ca positions, resulting in the following descending order of K > N > P > Ca > Mg (Sato et al, 2016).…”

“…According to them, K was the only one that presented a significant difference for 'VR 043-43' and 'Paulsen 1103' rootstocks among the nutrients exported to berries, with contents of 2048 and 1829 Kg ha -1 , respectively. Sato et al (2016) assessed the yield and nutrients uptake of 'Isabel Precoce' grape vines grafted on 'Paulsen 1103' and 'VR 043-43' rootstocks in the region of Marialva, state of Parana, yielding between 9.9 and 16.6 t ha -1 , respectively. The amounts of N, P, K, Ca and Mg were, respectively, of 64.9, 19.0, 156.9, 45.8 and 12.66 kg ha -1 when grafted on 'Paulsen 1103';and 112.8, 29.3, 260.8, 82.3 and 26.0 kg ha -1 when grafted on 'VR 043-43'.…”