Effect of environmental factors on the emergency and germination of bittergrass (Digitaria insularis (L.) fedde)
International Journal of Development Research
Effect of environmental factors on the emergency and germination of bittergrass (Digitaria insularis (L.) fedde)
Received 20th June, 2021; Received in revised form 16th July, 2021; Accepted 01st August, 2021; Published online 27th September, 2021
Copyright © 2021, Lúcia Helena da Costa Bezerra et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Six experiments were conducted to evaluate the effects of abiotic factors of bittergrass: temperature (15, 20, 25, 30, 35 °C), light (0/24, 8/16, 12/12, 16/8, 24 / 0 hours, being light regimes / dark cycle), pH (4, 5, 6, 7, 8 and 9), osmotic stress (0, - 0.1, -0.3, -0.6, -0, 9 Mpa), salt concentration (0, 20, 40, 80, 160 and 240 mM), conducted in laboratory (DIC) and planting depth (0, 2, 4, 8 and 12 cm), conducted in greenhouse (DBC). The data were submitted to analysis of variance using the program and SigmaPlot e Sisvar. The results showed that germination rate of the seeds was greater than 80% at temperatures of 25 to 35 °C. The maximum germination occurred at 30 °C (92%). In addition, seeds had the tolerance to saline stress at concentrations of 20 (21%) and 40 mM (37%), but the germination was very low at potencies of 80mM (7%), 120mM (2%) and 240mM (0%). When seeds were placed on soil surface emergence was high (91%). The results this study will lead to a better understanding of environmental factors effects of on germination and emergence of bittergrass, will provide information that may contribute to an effective control.
