home    about    browse    search    latest    help 
Login | Create Account

Soil weed seed bank and factors influencing the number of weeds at the end of conversion period to organic production

Kuht, Jaan; Eremeev, Viacheslav; Talgre, Liina; Madsen, Helena; Toom, Merili; Maeorg, Erkki and Luik, Anne (2016) Soil weed seed bank and factors influencing the number of weeds at the end of conversion period to organic production. Agronomy Research, 14 (4), pp. 1372-1379.

[thumbnail of Kuht et al 2016.pdf]
PDF - English


In 2008 an experiment was set up on the field in Eerika experimental station (Estonian University of Life Sciences) as a 5-field crop rotation: red clover, winter wheat, pea, potato and barley undersown with red clover. The objective of the study was to measure the content of weed seeds in the soil and to evaluate the diversity of the species at the end of the period of converting to organic production. In conventional farming systems without fertilizer (Conv I) and conventional farming with mineral fertilizer (Conv II) herbicides were used for weed control. All the crops in Conv II system received P 25 kg ha-1 and K 95 kg ha-1, but the application rates of mineral nitrogen fertilizer differed. In organic systems (Org I – organic farming based on winter cover crop and Org II - organic farming based on winter cover crop and manure), the winter cover crops (ryegrass after winter wheat, winter oilseed rape after pea, winter rye after potato) were sown after the harvest and were ploughed into the soil as green manure in spring. The content of annual weed seeds was the lowest in red clover that had 17.7% less weed seeds in the soil of Org II system compared to control (Conv I). In winter wheat the content of winter annual weed seeds was 50–76% higher compared to other crops. By the end of 2009 the content of organic carbon (Corg %) in the soil had increased significantly in both organic systems which results in higher activity of organisms that decrease the viability of weed seeds.

EPrint Type:Journal paper
Keywords:organic farming, soil, weed seeds, seed bank, crop rotation, winter cover crops.
Agrovoc keywords:
seed banks (genetics) -> gene banks
cover crops -> cover plants
crop rotation
organic farming -> organic agriculture
Subjects: Farming Systems
Environmental aspects > Biodiversity and ecosystem services
Crop husbandry > Weed management
Research affiliation: Estonia > Estonian University of Life Sciences
European Union > CORE Organic Plus > FertilCrop
Horizon Europe or H2020 Grant Agreement Number:618107
Deposited By: Peetsmann, Ms Elen
ID Code:32504
Deposited On:03 Jan 2018 23:35
Last Modified:02 Apr 2020 07:24
Document Language:English
Refereed:Peer-reviewed and accepted

Repository Staff Only: item control page


Downloads per month over past year

View more statistics