Weed species abundance in north China plain winter wheat productions systems
- Publikations-Art
- Kongressbeitrag
- Autoren
- Alexander Menegat and Chunxin Hao and Hanwen Ni and Roland Gerhards
- Erscheinungsjahr
- 2011
- Veröffentlicht in
- 23rd Asian-Pacific Weed Science Society Conference -- Weed Management in a Changing World
- Tagungsname
- 23rd Asian-Pacific Weed Science Society Conference
- Tagungsort
- Queensland, Australia
- Tagungsdatum
- 26.--29. Sep. 2011
Agriculture in the North China Plain (NCP) is in a state of rapid upheaval to meet the challenges of an increasing food demand. Weed science is therefore facing new challenges as well, like the adjustment of weed control to modified cropping systems and the spread of new weed species into the NCP. The winter wheat production in the North China Plain is characterized by a double cropping system of winter wheat followed by summer maize. Furthermore wheat production is characterized by high fertilizer input and high input of pesticides. Under the objective of improving prospective weed management practices a weed survey was held in 2009 and 2010, in which 62 winter wheat fields were investigated regarding weed species composition and density and its dependency on environmental and agronomic factors. Therefore the variables crop density, soil nitrate-N, soil pH, cumulative precipitation, temperature sum (>5°C), geographic positions and soil texture were gained from each sampling site. A canonical correspondence analysis was used to detect dependencies of the species abundance on the variables mentioned above. Descurainia sophia (L.) Schur. was found as the most abundant weed species followed by Capsella bursa pastois (L.) Medic.. The most abundant grass weed was Aegilops squarrosa L.. According to the canonical correspondence analysis soil sand content, soil pH, cumulative precipitation and soil nitrate-N content are significantly influencing the weed species abundance. The results gained from this and prospective surveys play an important role for the development of integrated weed management strategies in the North China Plain.