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Combining mechanical control of couch grass (Elymus repens L.) with reduced tillage in early autumn and cover crops to decrease nitrogen and phosphorus leaching

Aronsson, Helena and Ringselle, Björn and Andersson, Lars and Bergkvist, Göran (2015). Combining mechanical control of couch grass (Elymus repens L.) with reduced tillage in early autumn and cover crops to decrease nitrogen and phosphorus leaching. Nutrient cycling in agroecosystems. 102:3, 383-396
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Abstract

Methods for control of couch grass (Elymus repens L.) with reduced tillage and cover crops to achieve low risk of nitrogen (N) and phosphorus (P) leaching were investigated. Treatments with reduced post-harvest tillage (one or two passes with duckfoot cultivator), hoeing between rows in combination with a cover crop, and a cover crop mown twice during autumn were compared with treatments with conventional disc cultivation and the control without tillage or cover crop. The study was conducted on a sandy soil in Sweden with measurements of N and P leaching. A 2-year experimental protocol was used, repeated twice. Treatments were implemented in the first year, and effects on couch grass (shoot density, shoot and rhizome biomass) were measured during autumn and in the second year. Significant effects of a single duckfoot cultivation and cover crop strategies were observed on couch grass shoot density in autumn but persistent effects were not verified. In conclusion, a single cultivation after harvest instead of repeated reduced the risk of N leaching and a cover crop in combination with hoeing or mowing effectively reduced it. Repeated cultivations resulted in mean annual N leaching of 26 kg N ha(-1) compared with 20 kg in the treatment with one cultivation, 17 kg in the control, 16 and 12 kg in cover crop treatments with mowing and hoeing, respectively. The P leaching was small (0.04-0.09 P ha(-1) year(-1)), but there were indications of increased P drainage water concentrations in the treatment with a cover crop which was mown.

Authors/Creators:Aronsson, Helena and Ringselle, Björn and Andersson, Lars and Bergkvist, Göran
Title:Combining mechanical control of couch grass (Elymus repens L.) with reduced tillage in early autumn and cover crops to decrease nitrogen and phosphorus leaching
Series/Journal:Nutrient cycling in agroecosystems (1385-1314)
Year of publishing :2015
Depositing date:12 January 2016
Volume:102
Number:3
Page range:383-396
Number of Pages:14
Publisher:Springer
ISSN:1385-1314
Language:English
Publication Type:Journal article
Refereed:Yes
Article category:Scientific peer reviewed
Version:Published version
Full Text Status:Public
Agris subject categories.:F Plant production > F07 Soil cultivation
Subjects:(A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 401 Agricultural, Forestry and Fisheries > Agricultural Science
Agrovoc terms:leaching, nutrients, Elymus repens, weed control, tillage, phosphorus
Keywords:Leaching, Nutrients, Elymus repens, Weed control, Competition, Reduced tillage
URN:NBN:urn:nbn:se:slu:epsilon-e-3168
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-e-3168
Additional ID:
Type of IDID
Web of Science (WoS)000358166000007
DOI10.1007/s10705-015-9712-7
ID Code:12942
Faculty:NJ - Fakulteten för naturresurser och jordbruksvetenskap
Department:(NL, NJ) > Dept. of Crop Production Ecology
(NL, NJ) > Dept. of Soil and Environment
(S) > Dept. of Soil and Environment
Deposited By: SLUpub Connector
Deposited On:12 Jan 2016 14:15
Metadata Last Modified:10 Feb 2016 20:21

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