Transient Thermal Flux as a Way to Stimulate the Loss Dormancy on Weed Seeds

Summertime weeds as Digitaria sanguinalis in many agro-ecosystems exist. In several cases, a welldefined weed control could be able to predict the seed emergence, to know the physiological status of the seeds in the soil bank, as well as, the factors that control and involving their germination. The goal of this work is to establish a relationship between the thermal properties and the process where the seeds start to be viable. In this study, a soil column device refilled with a calcareous silt loam soil was used, and two split seeds groups of Digitaria sanguinalis were buried at two height levels inside the column. The soil was monitored to determine the volumetric water content, temperature and thermal properties. Preliminary results allowed a rather complete understanding of the effect of the thermal flux on Digitaria sanguinalis seeds. The outcomes about the distribution of water content in the soil profile joint to thermal dataset allowed investigating into the variability of these properties and their relationships among them for this type of soil at laboratory scale.