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Effects of includin...
Effects of including forbs on N-2-fixation and N yield in red clover-ryegrass mixtures
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- Dhamala, Nawa Raj (author)
- Aarhus University
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- Rasmussen, Jim (author)
- Aarhus University
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- Carlsson, Georg (author)
- Swedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Biosystem och teknologi,Department of Biosystems and Technology
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(creator_code:org_t)
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- 2018-01-09
- 2018
- English.
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In: Plant and Soil. - : Springer Science and Business Media LLC. - 0032-079X .- 1573-5036. ; 424, s. 525-537
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Abstract
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- Legume biological nitrogen (N-2)-fixation is stimulated by neighbouring non-fixing species, but studies of legume N-2-fixation in temporary grasslands including non-leguminous forage herb (forb) species are rare.We investigated N-2-fixation, N yield, and total herbage production in a range of species mixtures consisting of three forb species-chicory (Cichorium intybus L.), ribwort plantain (Plantago lanceolata L.), and caraway (Carum carvi L.)-mixed into a traditional red clover (Trifolium pratense L.) and perennial ryegrass (Lolium perenne L.) mixture at two fertilisation levels.The percentage of red clover N derived from the atmosphere (%Ndfa) was higher in mixtures containing non-legumes than in pure stand but, did not increase with inclusion of forbs. On a whole-seasonal basis, red clover in mixtures derived 90% or more of its N from fixation even when fertilised with 216 kg total N ha(-1). Forbs, in particular chicory, reduced the amount of N-2-fixation and total N yields by affecting the red clover proportion in the harvested biomass.Generally, inclusion of forbs in red clover-ryegrass mixtures had no negative effect on total herbage production and percentage of legume N-2-fixation. However, to maintain a high total N and N-2-fixation yields, mixtures should not include a high seeding proportion of chicory.
Subject headings
- LANTBRUKSVETENSKAPER -- Lantbruksvetenskap, skogsbruk och fiske -- Jordbruksvetenskap (hsv//swe)
- AGRICULTURAL SCIENCES -- Agriculture, Forestry and Fisheries -- Agricultural Science (hsv//eng)
Publication and Content Type
- ref (subject category)
- art (subject category)
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