Substratos com compostos de adubos verdes e biofertilizante via foliar na formação de mudas de maracujazeiro-amarelo

Abstract

; Ronaldo do Nascimento 4 ResumoSubstratos e adubações são fundamentais para a produção de mudas, que bem nutridas produzem precocemente e resistem melhor a estresses. Estercos são muito utilizados em substratos não industrializados, com bons resultados para as mudas, mas seu custo tem se elevado. Outros resíduos podem ser utilizados para nutrir as plantas, tanto via substrato quanto via adubação foliar. O objetivo do trabalho foi avaliar substratos elaborados com compostos orgânicos de adubos verdes e o uso de adubação foliar com biofertilizante na formação de mudas de maracujazeiro-amarelo. O experimento foi conduzido em estufa entre dezembro de 2009 e fevereiro de 2010. Com delineamento de blocos casualizados e parcelas subdivididas, estudou-se adubação foliar com biofertilizante supermagro nas parcelas e os seguintes substratos nas subparcelas: solo; solo + esterco bovino; solo + composto de esterco com palha de aveia preta; solo + composto de esterco com palha de azevém; solo + composto de esterco com palha de nabo forrageiro; solo + composto de esterco com palha de ervilhaca. Foram realizadas três adubações foliares: aos 10, 25 e 40 dias após a emergência (DAE). Aos 50 DAE, as plantas foram coletadas para avaliar o crescimento e acúmulo de biomassa e nutrientes: N, P, K, Ca, Mg, Cu, Mn e Zn. Os dados foram submetidos à análise de variância e teste de Tukey. O substrato solo + esterco bovino promoveu maior diâmetro de caule, altura de planta, área foliar, extensão e volume radiculares e acúmulo de nutrientes. Dentre os substratos com compostos de adubos verdes, aqueles com compostos de aveia preta e nabo forrageiro destacaram-se dos demais. O uso de supermagro teve resultado diverso sobre a formação das mudas, sendo benéfico quando combinado ao substrato com composto de aveia preta, e prejudicial em combinação com os substratos solo + esterco bovino e solo mais composto de nabo forrageiro. O acúmulo de nutrientes pelas mudas deu-se na seguinte ordem: K>Ca>N>Mg>P>Zn>Cu=Mn. Palavras-chave: Passiflora edulis Sims f. Flavicarpa Degener, compostagem, supermagro AbstractSubstrates and fertilization are fundamental for seedling production, which well nourished can produce earlier and are more resistant to stresses. Animal manures are often used in non-industrialized substrates

Growth and nutrition of Pitombeira (Tasilia esculenta Radlk) seedlings in different substrates and biofertilizer application

“…Cavalcante et al (2016b) used the organic composite in passion fruit seedlings. The values observed for the nitrogen contents are higher than those of the other plant species studied, as described by Barros et al (2013), who worked with different organic substrates in yellow passion fruit seedlings (Passiflora edulis Sims f. Flavicarpa Degene) and showed that the nitrogen accumulation was better in the substrate composed of soil and tanned bovine manure. Reis et al (2015) obtained a value of 16.79 g kg -1 working with Dilodendron bipinnatum Radkl (Sapindaceae); whereas Antunes et al (2016) found values varying between 9.73 and 12.44 g kg -1 using vermicompostos of different agroindustrial residues in black acacia (Acacia mearnsii Wild).…”

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

“…Barros et al (2013) found significance in the dry root mass when evaluating different substrates made with compounds of green manure and application of foliar biofertilizers in seedlings of yellow passion fruit, however, the substrate with manure, provided dry mass increase and should be the best fertility conditions provided to the substrate. Cruz et al (2008) observed that the use of swine wastewater in irrigation of sour passion fruit seedlings provided increase in the amount of dry matter of seedlings, supplying the nutritional demand of seedlings without the supply of commercial fertilizers.…”

Guava rootstocks growth under incorporation of cattle manure and application of organic fertilizer the base of fruit of peel

“…Cavalcante et al (2010) in guava plants observed that treatment with cattle manure was superior to the leaf area and length of the guava root, with a maximum of 167.5 cm² value for leaf area and 29 cm long root. Barros et al (2013) in passion fruit, obtained the best results for leaf area (966.3 cm²) and root length (17 cm) with substrates composed of hardened soil + cattle manure. In guava rootstocks treated with manure proportions, there was increasing linear behavior due to the increase of manure ratios for the leaf area to 90 ( Figure 8A) and 120 DAS ( Figure 8B), representing increases of 0,0349 cm² to 90 DAS for each unit increase in cattle manure proportions.…”

“…Oliveira et al (2015) observed that the proportion of 37.25% of manure gave the highest root dry mass values (3.49 g). Barros et al (2013) in passionflower, achieved the best results (1.32 g) to root dry mass with substrates composed of cattle manure + hardened soil. Cavalcante et al (2010) studied saline water and liquid manure in the formation of guava plants grow paluma observed that plants treated with liquid manure bovine had damage to a lesser extent in the treatments with organic input.…”