Pinke G, Csiky J, Mesterházy A et al.: The impact of management on weeds... (2014)

Pinke G, Csiky J, Mesterházy A, Tari L, Pál RW, Botta-Dukát Z & Czúcz B
2014
The impact of management on weeds and aquatic plant communities in Hungarian rice crops.
Weed Research 54: 388–397
Summary: 

This study assessed the cultural and weed-management factors influencing the weed communities of Hungarian rice fields. Hungary is situated at the northern limit of rice production with about 300 years history of rice culture. We surveyed the weed flora and 25 background variables in 100 active rice fields. Using a minimal adequate model containing 11 terms, 48.5 % of the total variation in weed species data could be explained. The net effects of 9 variables on species composition were significant. Crop cover was found to be the most important explanatory variable, which was followed by the herbicides penoxsulam & azimsulfuron, tillage depth, phosphorous & potassium fertilisers, years after last rotation, water depth in May, sowing type, pendimethalin and water conductivity. Filamentous algae, as the most abundant group of weeds, were positively associated with deep tillage, deep water, and surface sowing.