Plamen Marinov-Serafimov1, Stanimir Enchev2, Irena Golubinova1
1 Agricultural Academy, Institute of Forage Crops, Pleven 5800, Bulgaria
2 Agricultural Academy, Agricultural Institute, Shumen 9700, Bulgaria
Marinov-Serafimov, P., Enchev, S., & Golubinova, I. (2019). Allelopathic soil activity in the rotation of some forage and technical crops. Bulgarian Journal of Agricultural Science, 25(5), 980–985
Allelopathic soil activity of some forage and technical crops was studied on the initial development of Lactuca sativa L. It was found that: depending on the development index (GI), the allelopathic soil activity of the tested forage and technical crops grown in rotation pairs can be ranked in the following ascending order: Sugar beet/Vetch-oat mix (89.6%) → Sudan grass/Vetch-oat mix (86.0%) → Vetch-oat mix/Sugar beet (73.1%) → Alfalfa/Sudan grass (45.8%) → Stevia/Sorghum for grain (43.7%) → Sorghum for grain/Sugar beet (40.5%) → Sugar beet/ Sudan grass (31.3%) → Vetch-oat mix/Sudan grass (30.0%) → Sugar broom/Sorghum for grain (29.3%) → Wheat/Sudan grass (26.7%) → Sorghum for grain/Sorghum for grain (24.5%). The species from genus Sorghum (Sorghum for grain and Sudan grass) had a relatively high allelopathic effect and can be included as a component in future breeding programs and for biological weed control against weed species.