Publication Date
1993
Location
New Zealand
Description
To improve knowledge in the establishment and self-regeneration of medics grown in rotation with wheat in Chile, the long-term ambiental softening of medic seed is being studied. In March, (i) 72 samples of 100 pods each, were broadcast on the soil surface In plots of 20x20 cm, surrounded by a wood frame, and (ii) 12 samples were placed in a similar way, but the pods were buried at 1-2 ·cm. /11 sitr,, or field germination was recorded, and the germinated seeds destroyed. In (i), every 2 months during the first to fourlh softening season (SS), and in (ii), each March during the same seasons, each sample of the corresponding month and softening season was tested for germination of the In sillt non-germinated seeds, and the remaining non-germinated seeds were counted. This has been repeated for 4 collecting years (CY) in order to estimate variability. During the first to third SS, a significant increase in germination of soil surface seeds at the end of March was observed for the CY 1988 (31.4, 43.2 and 63,2% for the first, second and third SS respectively), Buried seeds showed higher germination than the soil-surface seeds (40,8, 57.5 and 76.4%, respectively). The germination of surface soil seeds during the first SS depended on the collecting year analysed. For example, in 1988 the germination increased significantly in March. In the other two years, softening occurred before, in January. From May to September the germination was similar in 1989 and 1990 (2.S-3.5%) but lower than in 1988 (10.7-14.2%).
Citation
Avendano, Julia R.; Del Pozo, Alejandro L.; and Ovalle, Carlos M., "Hardseededness of Medicago polymorpha Under Field Conditions in the Subhumid Mediterranean Zone of Chile" (1993). IGC Proceedings (1985-2023). 14.
(URL: https://uknowledge.uky.edu/igc/1993/session60/14)
Included in
Agricultural Science Commons, Agronomy and Crop Sciences Commons, Plant Biology Commons, Plant Pathology Commons, Soil Science Commons, Weed Science Commons
Hardseededness of Medicago polymorpha Under Field Conditions in the Subhumid Mediterranean Zone of Chile
New Zealand
To improve knowledge in the establishment and self-regeneration of medics grown in rotation with wheat in Chile, the long-term ambiental softening of medic seed is being studied. In March, (i) 72 samples of 100 pods each, were broadcast on the soil surface In plots of 20x20 cm, surrounded by a wood frame, and (ii) 12 samples were placed in a similar way, but the pods were buried at 1-2 ·cm. /11 sitr,, or field germination was recorded, and the germinated seeds destroyed. In (i), every 2 months during the first to fourlh softening season (SS), and in (ii), each March during the same seasons, each sample of the corresponding month and softening season was tested for germination of the In sillt non-germinated seeds, and the remaining non-germinated seeds were counted. This has been repeated for 4 collecting years (CY) in order to estimate variability. During the first to third SS, a significant increase in germination of soil surface seeds at the end of March was observed for the CY 1988 (31.4, 43.2 and 63,2% for the first, second and third SS respectively), Buried seeds showed higher germination than the soil-surface seeds (40,8, 57.5 and 76.4%, respectively). The germination of surface soil seeds during the first SS depended on the collecting year analysed. For example, in 1988 the germination increased significantly in March. In the other two years, softening occurred before, in January. From May to September the germination was similar in 1989 and 1990 (2.S-3.5%) but lower than in 1988 (10.7-14.2%).
