Effect of soil solarization, cover crops, and metham on field emergence and survival of buried annual bluegrass(poa annua)seeds

摘要

Field experiments were conducted on a silty clay loam in Corvallis, OR during the sum- mers of 1995 and 1996 to study the effects of soil solarization, spring-planted green manure crops, fumigation with metham, and combinations of these treatment on annual bluegrass seed survival. Annual bluegrass seeds were incorporated into the soil as a bioassay species and soil samples ex- Tracted to a depth of 15 cm to determine effects on seed survival.