Growth and dry matter of pitombeira seedlings under salinity levels and application of biofertilizer

Abstract

Pitombeira is a native fruit tree from Amazon and is exploited in an extractive way. Currently, there is no commercial cultivation of this crop since there are no technologies for cultivation, propagation methods, fertilization and irrigation. In this context, the aim of this study was to evaluate growth and dry matter of pitombeira seedlings (Talisia esculenta (A. St.-Hill.) Radlk.) under salinity levels with or without bovine biofertilizer. The experiment was performed in a nursery at the State University of Paraíba (UEPB), Campus IV, in Catolé do Rocha, Paraíba, from September to December 2015. It was adopted a completely randomized design (CRD) with 10 treatments and 4 repetitions, in factorial arrangement 5 x 2, corresponding to 5 salinity levels: (0,8; 2; 4; 6 e 8 dS m-1) with or without bovine biofertilization. Plant height, stem diameter, number of leaves, leaf area, total leaf area, Dickson quality index, dry mass of root, stem, leaf and the whole plant were analyzed. The increase in salinity provides a decrease in growth and dry matter of pitombeira seedlings. The use of biofertilizers mitigates the harmful effects of salinity on pitombeira seedlings.

Salinidade Na Água De Irrigação E Aplicação De Biofertilizante Bovino No Crescimento E Qualidade De Mudas De Tamarindo

“…Devido sua moderada tolerância à salinidade na fase de mudas, o tamarindeiro pode ser irrigado com águas salinas de média condutividade elétrica (GURUMURTHY et al, 2007;LIMA NETO et al, 2015). Contudo, como na maioria das espécies (MELO FILHO et al, 2017;VÉRAS et al, 2017;MELO FILHO et al, 2018), o tamarindeiro sofre efeitos comprometedores quando irrigado com águas com alta concentração de sais, refletindo em diversos distúrbios fisiológicos, dentre eles: inibição da viabilidade germinativa das sementes, redução do potencial osmótico, aumento da toxicidade iônica e desequilíbrio na absorção de água e nutrientes. Consequentemente, esses efeitos podem reduzir o crescimento das mudas (HARDIKAR; PANDEY, 2011).…”