Nutrition and accumulation of nutrients in Pochota fendleri seedlings

Abstract

The economic importance of mahogany highlights the importance of morphometric analyzes of seedlings and the nutritional status for the training of seedlings quality. It was intended in this work to investigate the effects of the addition or not of nutrient solution in different substrates on the quality of Pochota fendleri seedlings grown for 60 days as well as the accumulation of macro and micronutrients. The experimental design was the completely randomized in a 4 x 2 factorial scheme with five replications. Each plot was made up of five seedlings. The studied factors were: four mixtures of substrates and addition or not of nutrient solution: (T1) = sand; (T2) = soil; (T3) = soil + sand; (T4) = sand + soil + ground Brazil nut fruit treatments are eight: shell; (T1) = sand + nutrient solution; (T2) = soil + nutrient solution; (T3) = soil + sand + nutrient solution; (T4) = sand + soil + Brazil nut fruit shell + nutrient solution. Growth traits (height, stem diameter and shoot and root dry mass) and quality parameters of seedlings (shoot dry mass/root dry mass ratio, total dry mass and Dickson quality index) were evaluated. Pochota fendleri seedlings with addition of nutrient solution present growth and quality independent of the substrate. The following nutritional requirement of the Pochota fendleri seedlings to the three substrates with nutrient solution addition follows the descending order for the macronutrients (N > Ca > K > Mg > P > S) and micronutrients (Fe > Mn > B > Zn > Cu).

Controlled-Release Fertiliser and Substrates on Seedling Growth and Quality in Agonandra brasiliensis in Roraima

“…Similarities were found between the treatments, comparing the quality of the Agonandra brasiliensis plants grown in substrate 4 with and without added SRF (Figure 5B), making the unit cost per seedling attractive due to the possibility of reducing costs through the use of this input. Substrates 2, 3 and 5, with and without the addition of SRF, did not reach the minimum value for the quality index, which according to Souza et al (2018), is equal to or greater than 1 for forest species.…”

“…There are several materials that can be used, either singly or combined, as substrates to produce seedlings of forest species, such as sand, soil, expanded clay, vermiculite, sawdust, rice husks and coconut-shell fibre, among others (Souza et al, 2018). A good substrate with proper handling should be used, together with a quality fertiliser in suitable doses.…”

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

“…The results obtained for the accumulation of S in the aerial part of the seedlings varied from 0.12 to 0.33%. Souza, Smiderle and Chagas (2018), establishes for forest species the adequate accumulation of S, in general, is between 0.2 and 0.4%. In the present study, the accumulation of S was within the range established by Souza et al (2018), except in the witness and times 0; 60 and 80 DAT with and without addition of nutrient solution (Figure 2 K and L).…”

“…Souza, Smiderle and Chagas (2018), establishes for forest species the adequate accumulation of S, in general, is between 0.2 and 0.4%. In the present study, the accumulation of S was within the range established by Souza et al (2018), except in the witness and times 0; 60 and 80 DAT with and without addition of nutrient solution (Figure 2 K and L). The S applied in adequate doses can favor the best growth and development of plants by their participation in the conversion of non-protein nitrogen into protein (MENEGATTI; SOUZA; BIANCHI, 2019).…”

Container volume and controlled-release fertilizer influence the seedling quality of Agonandra brasiliensis

“…According to Souza et al (2018), shoot height, together with collar diameter, is one of the most important morphological characteristics for estimating the growth of forest seedlings after permanent planting in the field. Thus, the greatest increases in height and stem diameter occurred with the fertilizer doses (of maximum technical efficiency) of 6.45 g L -1 and 5.86 g L -1 , respectively, both in the container of 2.2 L. This increase was likely due to the proper dose of slow-release fertilizer and appropriate container volume, the combination of the continuous nitrogen supply to the plant and the local soil or climate factors, such as solar radiation and temperature, resulting in a greater photosynthetic efficiency and the production of new tissues in the plant organs.…”