Influence of depth placement and duration of stay in the soil of Amaranthus species seeds on rest and germination
Published in Scientific Papers. Series A. Agronomy, Vol. LV-2012
Written by Cveta MOSKOVA
Influence of depth placement and duration of stay in the soil of seeds of Amaranthus retroflexus L. and Amaranthus hybridus L. on rest and germination was determined. In the methodology is reported Omami field germination, number of laboratory germination and sprouting seeds after treatment with growth regulator. It was found that where the seeds of both amaranth species: Amaranthus retroflexus L. and Amaranthus hybridus L., are left for 3, 6, 9 or 12 months at depths of 2.5, 5, 10, 20 and 30 cm, they remained latent and no germination was observed. They remain latent and this is a condition for potential growth of this weed. Under controlled laboratory conditions, the highest germination of Amaranthus retroflexus L. (8-15%) was observed in seeds left buried for 12 months; between 0.5% and 6.3% in seeds buried for 9 months and only 0.3% in seeds buried for 6 months. Hybrid amaranth has shown higher germination under laboratory conditions than common amaranth. The germination rate varied from 32.4% to 43.8% at depths of 20 and 30 cm to the difference of depths of 2.5 and 5 cm, which has been statistically proven. The germination rate (50%) was the highest where the seeds were buried for 6 months. The lowest germination rate under laboratory conditions was observed when the seeds were buried for 3 months at a depth of 30 cm.