Growth, nutrition and efficiency in the transport, uptake and use of nutrients in african mahogany

Nutritional status and biomass of african mahogany seedlings grown with nutrient solution in the Northern Amazon

“…The results of the DQI of the present study with seedlings of Khaya senegalensis were similar to those obtained for seedlings of Khaya ivorensis, whose average values ranged from 3.8 to 5.4 (SOUZA et al, 2020b), however, values above the recommended by Lima Filho et al (2019) whose value is below the minimum limit (0.30). According to Reis et al (2016) the minimum DQI value is 0.30 being a good indicator of seedling quality, however, it is necessary to be cautious and consider this value in relation to each species and cultivation conditions.…”

“…Likewise, times and addition of nutrient solution provided seedlings with higher H, CD, RDM, SDM, TDM, however, by associating some of these variables (H, CD, RDM, SDM and TDM) in seedling quality indexes, the 140 DAT season with addition of nutrient solution proved to be the most advantageous option for the production of Khaya senegalensis seedlings. Souza et al (2020b), in their research proved that the addition of nutrient solution to the substrates used in the production of seedlings, guarantees the availability and efficient use of N by plants, N is an essential element to the components of the photosynthetic system, such as chlorophylls, carboxylase/oxygenase activity of ribulose 1.5 bisphosphate and phosphoenolpyruvate carboxylase, thus maintaining satisfactory rates of carbon assimilation, and consequently guaranteeing the production of photoassimilates that supply plant growth.…”

“…In this sense, it is worth mentioning that the quality of the root system of Khaya senegalensis without the addition of a nutrient solution associated with the substrate, the roots were fragile, breaking easily when removing the substrate. It is probably related to the fact that calcium (Ca) is found in an insufficient level in African mahogany seedlings, thus affecting the quality and the development of new roots (SOUZA et al, 2020b). Since Ca deficiency can show serious restrictions to the root development and growth, since this nutrient has limited internal redistribution, due to low mobility (MENEGATTI; SOUZA; BIANCHI, 2019).…”

“…The African Mahogany, originally from Africa, belongs to the genus Khaya and to the botanical family Meliaceae, with emphasis on four timber species of economic potential, Khaya ivorensis, Khaya grandifolia, Khaya anthotheca and Khaya senegalensis, described as African Mahoganies. Thus, these species have been suggested by the research to substitute the Brazilian mahogany (Swietenia macrophylla), due to its classification, use, competitiveness and high final value of this wood (SOUZA et al, 2020b). According to Souza et al (2020b), the african mahogany plants grown in fertile soils, close to 20 years of age, can exhibit up to 35 meters in height and diameter up to 1.5 meter and from 8 to 16 stem without lateral ramifications.…”

“…Thus, these species have been suggested by the research to substitute the Brazilian mahogany (Swietenia macrophylla), due to its classification, use, competitiveness and high final value of this wood (SOUZA et al, 2020b). According to Souza et al (2020b), the african mahogany plants grown in fertile soils, close to 20 years of age, can exhibit up to 35 meters in height and diameter up to 1.5 meter and from 8 to 16 stem without lateral ramifications. The species Khaya senegalensis, popularly known as African mahogany, has been the subject of recent research for presenting economic potential (provides wood of various noble uses) for the commercialization of its wood in the Brazilian and in the international markets (SMIDERLE et al, 2018).…”