Title: Road verges and winter wheat fields as resources for wild bees in agricultural landscapes

Abstract:The effects of farming system on plant density and flowering of dicotyledonous herbs of high value for bees were investigated in 14 organic and 14 conventional winter wheat fields and adjacent road verges. The organic and conventional winter wheat fields/road verges were paired based on the percentage of semi-natural habitats in the surrounding landscape at 1-km scale. Mean density of high value bee plants per Raunkiaer circle was significantly higher in organic winter wheat fields and their adjacent road verges than in their conventionally farmed counterparts. The effect of organic farming was even more pronounced on the flowering stage of high value bee plants, with 10-fold higher mean density of flowering plants in organic fields than in conventional fields and 1.9-fold higher in road verges bordering organic fields than in those bordering conventional fields. In summary, organic farming had a strong positive effect in both road verges and wheat fields on the density of high value bee plants. This was due to the absence of herbicides and to practices inherent to organic farming systems, such as the use of clover (a high value bee plant) as a green manure and fodder crop. [Henriksen, C. I. & Langer, V. (2013). Road verges and winter wheat fields as resources for wild bees in agricultural landscapes. Agriculture, Ecosystems & Environment, 173 (1):66–71] Comment

Keywords: Organic farming; Winter wheat; Road verge; Wild plants; Bumblebees; Solitary bees

Original source



Article: WeedsNews4483 (permalink)
Categories: :WeedsNews:research alert, :WeedsNews:bees, :WeedsNews:beneficial weeds, :WeedsNews:biodiversity, :WeedsNews:cover crop, :WeedsNews:landscape design, :WeedsNews:organic farming, :WeedsNews:roadside weeds
Date: 10 June 2013; 8:27:02 pm Australian Eastern Standard Time

Author Name: Zheljana Peric
Author ID: zper12