EFFECT OF PHOSPHATE FERTILIZATION AND BASE SATURATION OF SUBSTRATE ON THE SEEDLINGS GROWTH AND QUALITY OF Plathymenia foliolosa Benth.

Abstract

-This study aimed to evaluate the growth and quality of seedlings of Plathymenia foliolosa Benth in response to base saturation of substrate and phosphate fertilization. The treatments were arranged in a factorial design of 6 P levels (0, 120, 240, 360, 480 and 600 mg dm -3 ) by 5 base saturation levels (3.5, 25, 40, 55, 70 %), in randomized blocks with four replications. The height of aerial part, neck diameter, shoot dry matter, root dry matter and total dry matter were determined at 118 days after the transplanting. It was still calculated the relation shoot dry matter/root dry matter and the Dickson Quality Index. There were significant effects of the phosphate fertilization for all studied variables. The base saturation had influence on all studied variables, except for the shoot dry matter/root dry matter relation. No significant effect of the interaction between base saturation of substrate and phosphate fertilization was observed on seedlings growth and quality. For the studied conditions, it is recommended 300 mg dm -3 of P for the production of quality seedlings of Plathymenia foliolosa without the necessity of liming.Keywords: Phosphorus; Seedlings Production; Liming. EFEITO DA ADUBAÇÃO FOSFATADA E SATURAÇÃO POR BASES DO SUBSTRATO SOB O CRESCIMENTO E A QUALIDADE DE MUDAS DEPlathymenia foliolosa Benth. RESUMO -O objetivo deste estudo foi avaliar o crescimento e a qualidade de mudas de Plathymenia foliolosaBenth. (vinhático-da-mata) em resposta à adubação fosfatada e saturação por bases do substrato. Os tratamentos foram representados por um fatorial de seis níveis de fósforo (0, 120, 240, 360, 480 e 600 mg dm -3 ) por cinco níveis de saturação por bases do substrato (3,5, 25, 40, 55, 70%), sendo dispostos no delineamento em blocos ao acaso, com quatro repetições. Aos 118 dias após a repicagem, foram obtidas a altura da parte aérea (H), o diâmetro do coleto (D), a massa de matéria seca da parte aérea (SDM), de raízes (RDM) e total (TDM), e calculada a relação SDM/RDM e o índice de qualidade de Dickson (DQI). A adubação fosfatada teve efeito significativo para todas as variáveis estudadas. O efeito da saturação por bases também foi significativo, exceto para a SDM/RDM. Não foi observado efeito significativo para a interação entre saturação por bases e adubação fosfatada. Para as condições estudadas, recomenda-se a aplicação de 300 mg dm -3 de P, sem necessidade de calagem, para a produção de mudas de vinhático-da-mata.Palavras-chave: Fósforo; Produção de mudas; Calagem.

MORPHOPHYSIOLOGICAL AND NUTRITIONAL BEHAVIOR OF Hymenaea stigonocarpa Mart. ex Hayne (FABACEAE) SEEDLINGS SUBMITTED TO LIMING

“…The increases base saturation did not infl uence H. stigonocarpa seedling growth and biomass parameters, although the highest values were obtained in the non-liming treatment, except for stem diameter. This indicates that Ca² + and Mg² + content found in the studied soil associated to high seed nutritional reserves are suffi cient for initial demands (Carlos et al, 2014), and is one of the reasons why liming is not necessary for the seedling production of other Cerrado species, such as Hymenaea courbaril L (Furtini Neto et al, 1999), Mimosa caesalpiniifolia Benth (Costa Filho et al, 2013), S. parahyba (Coneglian et al, 2016), P. foliolosa (Freitas et al, 2017b) and D. mollis (Cota et al, 2019).…”

“…Given this information, it is noted that some plants grow well at low soil Ca² + concentrations and respond very little when the availability of this nutrient increases, in some cases leading to growth inhibition, as observed in P. foliolosa and D. mollis (Freitas et al, 2017b;Cota et al, 2019). This is due to the fact that excessive Ca² + absorption in plants leads to ionic balance disturbances, decreased absorption of other nutrients or changes in cytosol pH (Balakrishnan et al, 2000).…”

“…S. F. Blake and Leucochloron incuriale (Vellozo) Barneby and Grimes (Coneglian et al, 2016;Santos et al, 2019). Liming promoted negative responses to seedling growth in Plathymenia foliolosa Benth and Dimorphandra mollis Benth (Freitas et al, 2017b;Cota et al, 2019), while positive response was noted in Dalbergia nigra (Vell.) Allemão ex Benth (Carlos et al, 2018).…”

Growth and Quality of Leucochloron incuriale Seedlings Subjected to Liming and Phosphorus

“…Several studies have confirmed the importance of P to the initial plant-growth phase, since phosphorus allows higher seedling survival rates in the field (Caione et al, 2012). The growth and quality of Cordia goeldiana , Anadenanthera macrocarpa (Gonçalves et al, 2008), Apuleia leiocarpa , Ilex paraguariensis (Santin et al, 2008), Lithraea molleoides, Schinus terebinthifolius, Sesbania virgata (Santos et al, 2008), Mimosa caesalpiniaefolia (Gonçalves et al, 2010), Senna macranthera (Cruz et al, 2011), Cassia grandis (Freitas et al, 2017a), Plathymenia foliolosa (Freitas et al, 2017b) and Enterolobium contortisiliquum (Leite et al, 2017) seedlings were positively influenced by phosphate fertilization; this outcome corroborates the results in our study.…”

Decomposed Babassu Biomass: New Substrate for the Production of Jacaranda mimosifolia D. Don Seedlings

“…In Brazil, the population's awareness of environmental problems boosted the demand for native forest seedlings for reforestation and recovery of deforested areas, allowing efficient recovery of vegetation cover, essential for the restoration of environmental balance (Gonçalves et al, 2015;Soares et al, 2017;Freitas et al, 2017).…”