Crescimento inicial de mudas de maracujazeiro amarelo em função de doses crescentes de superfosfato simples

Abstract

Com objetivo de avaliar o crescimento de mudas de maracujazeiro amarelo, em função de doses crescentes de superfosfato simples, conduziu-se um experimento em condições de casa de vegetação no campus da Universidade Estadual do Oeste do Paraná -UNIOESTE, em Marechal Cândido Rondon-PR. O delineamento experimental utilizado foi inteiramente casualizado, com cinco repetições e cinco tratamentos, sendo estes compostos pelas seguintes doses de superfosfato simples: 0; 0,28; 0,56; 1,11 e 2,78 kg m -3 . Durante a condução do experimento, avaliou-se semanalmente a altura de plantas; número de folhas, diâmetro de coleto, área foliar e acúmulo de matéria seca na parte aérea e raiz, até os 52 dias após a emergência. A aplicação de superfosfato simples promoveu incremento linear no crescimento em todas as variáveis avaliadas. Estes resultados permitem verificar resposta significativa da espécie à aplicação de superfosfato simples no período inicial de desenvolvimento. Os parâmetros da análise de crescimento evidenciaram o efeito do superfosfato simples sobre a área foliar e o acúmulo de matéria seca nas diferentes partes da planta. Palavras-chave:Adubação fosfatada, Passiflora edulis Sims, taxa de crescimento Initial growth of yellow passion fruit seedlings as a function of increasing simple superphosphate levels ABSTRACTThe objective of this work was to evaluate the growth of yellow passion fruit seedlings in response to increasing simple superphosphate levels. The experiment was carried out under greenhouse conditions in the campus of the West Parana State University -UNIOESTE, at the municipality of Marechal Cândido Rondon. A completely randomized design was used with five replications and five treatments, composed by the following simple superphosphate levels: 0; 0.28; 0.56; 1.11 and 2.78 kg m -3 . At each 7-days interval, until 52 days after plant emergency, measurements of plant height, number of leaves, stem diameter, leaf area and shoot and root dry matter accumulation were performed. The application of simple superphosphate promoted linear increase in all evaluated variables. The results showed that there was a significant response of the specie to the application of simple superphosphate in the early period of development. The parameters of growth analysis showed the effect of simple superphosphate on the leaf area and dry matter accumulation in different parts of the plant.

Production of yellow passion fruit seedlings on substrates with different organic compounds

“…The lower growth was observed in the control, data that can be explained by the chemical conditions and soil fertility. The pH was considered with high acidity and all other attributes in conditions that do not favor plant growth, results corroborate that by Fey et al (2010) where they evaluated the initial growth of yellow passion fruit seedlings due to increasing doses of superphosphate.…”

Effect of phosphorus application on substrate and use of saline water in sugar-apple seedlings

“…For height growth, the maximum TSP dose was the same presented by Fey et al (2010), in yellow passion fruit seedlings fertilized with simple superphosphate, irrigated with water at will. The greatest increase in the relative growth rate of 2.1 was obtained at the dose of 2.82 g dm -3 (Figure 2b).…”

Growth and nutrient uptake by slash pine seedlings under phosphate fertilizer sources

“…Serrano et al (2006), studying yellow passion fruit (Passiflora edulis F. flavicarpa) seedlings, concluded that controlled release fertilizer resulted in taller plants, greater stem diameter, more leaves, greater leaf area and shoot dry mass when compared to periodic foliar fertilization with NPK and soluble phosphate + KCl + urea. Also, in yellow passion fruit, Fey et al (2010) observed a linear response in plant height and stem diameter to soluble phosphate, but the highest dose used by the authors was only 2.78 kg m -3 of SPS. Here, the highest SPS dose was 4.22 kg m -3 .…”