<b>Germination and growth of <i>Albizia niopoides</i> (Bentham) Burkart (Fabaceae)

Abstract

Albizia niopoides (Bentham) Burkart, known as farinha seca, is an arboreal, deciduous and pioneer plant that can be found in the semi-deciduous forest in the Paraná basin. The study on the germination and growth of the plant is fundamental for better knowledge about the establishment and regeneration of the species. Aiming to verify the germination of A. niopoides and subsequent growth, green seeds and brown seeds were germinated in a germination chamber and growth parameters were evaluated at 60, 90, and 180 days after transplanting (DAT) in a greenhouse. There was no significant difference in germination percentage between green and brown seeds. However, lower levels of mean germination times and higher levels of germination speed index were observed for brown seeds. At 180 DAT, plants showed higher shoot dry mass, root dry mass, total dry mass, number leaves and height, with no significant difference between 60 and 90 DAT for total dry mass, root dry mass and root length. The values of stem height/diameter and Dickson quality index, associated to the other growth parameters, indicate quality of the seedlings for field planting at 180 DAT.

Momento de colheita de sementes de <i>Albizia hasslerii</i> (Chod.) Burkart em função da cor do fruto

“…Os frutos classificados como dos estádios 3 e 4 apresentaram maior porcentagem de emergência (E) e maior índice de velocidade de emergência (IVE) que os demais, seguidos do estádio 2, pelo estádio 1 com os menores valores. Barbeiro et al (2018), em estudo com germinação e crescimento de Albizia niopoides (Benth.) Burkart, com sementes de cores verde e marrom, verificaram que as sementes marrons foram mais vigorosas que as verdes, apresentando maior porcentagem de emergência, IVE e IVG, e concluíram que as sementes marrons geraram mudas com qualidade superior.…”

Technical feasibility of the use of topsoil in the composition of substrates of Caatinga forest species

“…According to Oliveira et al (2019), the four species studied had a minimum of three pairs of leaves, a criterion adopted by forestry companies to classify seedling quality. superior results were obtained by Barbeiro et al (2018), in which 'Farinha Seca' had 12.3 leaves. This information, despite the differences in treatments, management practices and the region where they were developed, indicate that topsoil may become an option for seedling production, in view of the importance of the number of leaves.…”

“…= 36.6 cm), however, without significant effect for 'Ipê Branco' (p > 0.05). In general, although the species 'Canafístula', 'Farinha Seca' and 'Ipê Branco' had averages below 20 cm, it is possible that the evaluation period (90 DAP) was insufficient, considering that Portela et al (2001), at 150 DAP, Barbeiro et al (2018) and Cardorin et al (2021), at 180 DAP, observed mean heights of 20.4, 38.2 and 28.9 cm for the three species, respectively.…”