SANTOS, Jerffson L. et al. Development of Passiflora cincinnata Mast. submitted to different levels of nitrogen and potassium. []. , 40, 4, pp.70-79. ISSN 0871-018X.  https://doi.org/10.19084/RCA17035.

^len^aThe present study aimed to evaluate the morphological characteristics of passion fruit (Passiflora cincinnata Mast.) under different levels of nitrogen and potassium, and interactions between these nutrients. The experimental design was randomized blocks, with a 4 x 4 factorial arrangement of treatments, three replications per treatment and 48 experimental plots and the experimental unit was composed of one plant. Factors were four doses of N (0, 75, 150 and 300 mg of N dm^-3 of soil, applied as urea, 45 % N), and four doses of K (0, 150, 300 and 600 mg of K dm^-3 of soil, applied as potassium chloride, 60 % K₂O). After 60 days of transplanting the seedlings to pots, stem diameter, leaf number, SPAD (Soil Plant Analysis Development) index, leaf area, dry weight of shoot and root were evaluated. The interaction effect between levels of N and K was observed when the dry weight of shoot, stem diameter and SPAD index was assessed. The greatest growth rate of Passiflora cincinnata Mast. was obtained at doses of 180 to 300 mg of N dm^-3 of soil. Potassium rates used in this study reduced the potential for accumulation of dry mass of the shoots.^lpt^aO presente estudo teve como objetivo avaliar as características morfológicas de plantas de maracujá-do-mato (Passiflora cincinnata Mast.) submetidas a diferentes doses de nitrogênio e potássio, verificando as possíveis interações entre estes nutrientes. O delineamento experimental adotado foi em blocos casualizados, em esquema fatorial 4 x 4, com 16 tratamentos e três repetições, perfazendo 48 parcelas experimentais. Foram definidas quatro doses de N (0, 75, 150 e 300 mg de N dm^-3 de solo) aplicadas na forma de ureia (45% N), e quatro doses de K (0, 150, 300 e 600 mg de K dm^-3 de solo) utilizando o cloreto de potássio (60% K₂O). Após 60 dias do transplante das mudas para os vasos, foram avaliados diâmetro do caule, número de folhas, índice SPAD, área foliar, massa seca da parte aérea e raiz. O efeito da interação entre níveis de N e K foi verificado quando foi avaliada a massa seca da parte aérea, diâmetro do caule e índice SPAD. O maior crescimento de Passiflora cincinnata Mast. foi obtido nas doses de 180 a 300 mg N dm^-3 de solo. As doses de K utilizadas no presente estudo reduziram o potencial de acumulação de massa seca da parte aérea das plantas.

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