Claim · model-written summary
Past catch crops increased later barley grain and straw N offtake.
- Taxon
- spring barley
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Hordeum vulgaree1 - Treatment
- catch cropse0
- Outcome
- N offtake in barley (grain+straw)e0
- Direction
- highere0
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleComparatorSettingValueQualifier
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
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Verbatim
e0“After termination of ryegrass growing, N offtake in barley (grain+straw) was higher in lysimeters in which catch crops had been grown previously”
e1“spring barley”
Title
Nitrogen conserving potential of successive ryegrass catch crops in continuous spring barley
I.K. Thomsen; B.T. Christensen Soil Use and Management 1999. doi:10.1111/j.1475-2743.1999.tb00088.x
Other claims from this paper (10)
- Intervention effect Undersown ryegrass did not affect barley dry matter yield.
- Intervention effect Undersown ryegrass did not affect barley nitrogen offtake.
- Intervention effect Grain yield appeared slightly reduced with ryegrass undersowing.
- Association Nitrate leaching loss increased with nitrogen addition rate.
- Intervention effect Ryegrass catch crops halved nitrate loss during 1985–1989.
- Intervention effect Mean annual nitrate leaching fell by 2.0–3.5 g N m −2 under ryegrass catch crops.
- Intervention effect After ryegrass ended, prior ryegrass lysimeters lost more nitrate than those without ryegrass history.
- Observation Later extra nitrate loss equalled 30% of nitrogen previously retained by catch crops.
- Mechanism Nitrogen conserved by ryegrass was interpreted as readily mineralized and available for crop uptake and leaching.
- Recommendation The authors recommend adjusting cropping to use mineralized nitrogen from ryegrass biomass.