Open AccessSubstrate and temperature on seed germination of Aspidosperma vargasii A. DC. (Apocynaceae)
Author(s) -
Izabele Domingues Soares Miranda,
Márcia do Rocio Duarte,
Rodrigo Otávio Veiga de Miranda
Publication year - 2021
Publication title -
colloquium agrariae
Language(s) - English
Resource type - Journals
ISSN - 1809-8215
DOI - 10.5747/ca.2021.v17.n5.a461
Subject(s) - germination , aspidosperma , vermiculite , horticulture , moisture , apocynaceae , water content , factorial experiment , substrate (aquarium) , botany , biology , agronomy , mathematics , materials science , composite material , ecology , biochemistry , indole test , geotechnical engineering , engineering , statistics
The Amazon has a wide diversity, including forest species with timber and non-timber potential, which often have their use restricted due to a lack of silvicultural information. Thus, the present study aimed to evaluate the effect of substrates and temperatures on seed germination of Aspidosperma vagarsii. Therefore, the premise of a completely randomized design was followed, in a 3 x 3 factorial scheme, with three substrates (paper, sand and vermiculite) and three temperatures (20, 25 and 30 °C). The germination percentage, germination speed index and mean germination time were determined, as well as germination relative frequency graphs. In addition, the weight of a thousand seeds, the number of seeds per kilo, and the moisture content was determined. The weight of thousand seeds was equal to 276.4 g, with 3,618 seeds per kilo, and a moisture content of 9.5%. There was no interaction between the studied factors. The sand substrate and temperatures of 20 and 25 °C presented the best results for seed germination of A. vargasii.