Abstract:

Red rooted foxtail (Amaranthus retroflexus L). is a summer, annual weed that reproduces and spreads by seed. It is common in all agricultural areas including along roadsides, fields, vegetables and gardens. In this research conducted in 2020-2022, the germination biology of Red rooted foxtail seeds was studied. In this context, dormancy-breaking studies, determination of germination temperatures and emergence depths were investigated. In dormancy breaking studies, sulfuric acid, sanding, folding, soaking in stagnant water and hot water application were performed on 0 and 4 month old seeds. Temperature values of 5, 10, 15, 20, 25, 30, 35 and 40 oC were used in the study to determine the germination temperature. In the study carried out to determine the depth of emergence of weed seeds, the seeds were planted in pots at a depth of 2, 5, 10, 15, 20 and 25 cm and the pots were left in the open air conditions for germination controls. According to the results obtained from the experiments, the best results for 0 month old seeds of Red rooted foxtail were determined by hot water application (40 oC 60 min) with 86.63% compared to the control (1.68%); for 4-month-old seeds, keeping in sulfuric acid (3, 5, 15 min) was determined to be 65.80%, 68.3%, 60.77%, respectively, compared to the control (19.95%). In germination temperature studies, the minimum, optimum and maximum germination temperatures of seeds were determined as 15oC, 35oC and 40oC, respectively. In the seed emergence depth studies, it was determined that the emergence was only at 2 and 5 cm depth. Plant emergence rates were 78.64% at 2 cm depth, 23.96% at 5 cm depth.

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