Abstract
Abstract This study investigates the effect of different crop rotation systems on carbon (C) and nitrogen (N) in root biomass as well as on soil organic carbon ( SOC ). Soils under spring barley and spring barley/pea mixture were sampled both in organic and conventional crop rotations. The amounts of root biomass and SOC in fine (250–253 μ m), medium (425–250 μ m) and coarse (>425 μ m) soil particulate organic matter ( POM ) were determined. Grain dry matter ( DM ) and the amount of N in harvested grain were also quantified. Organic systems with varying use of manure and catch crops had lower spring barley grain DM yield compared to those in conventional systems, whereas barley/pea showed no differences. The largest benefits were observed for grain N yields and grain DM yields for spring barley, where grain N yield was positively correlated with root N. The inclusion of catch crops in organic rotations resulted in higher root N and SOC (g C/m 2 ) in fine POM in soils under barley/pea. Our results suggest that manure application and inclusion of catch crops improve crop N supply and reduce the yield gap between conventional and organic rotations. The observed positive correlation between root N and grain N imply that management practices aimed at increasing grain N could also increase root N and thus enhance N supply for subsequent crops.
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Claims 8
Claim · model-written summary
Organic systems with varying manure use and catch crops had lower spring barley grain dry matter yield than conventional systems.
- Taxon
- spring barley
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Hordeum vulgaree0 - Treatment
- Organic systems with varying use of manure and catch cropse0
- Outcome
- grain DM yielde0
- Direction
- lowere0
- Comparator
- conventional systemse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“Organic systems with varying use of manure and catch crops had lower spring barley grain DM yield compared to those in conventional systems, whereas barley/pea showed no differences”
Claim · model-written summary
For barley/pea, organic systems did not differ from conventional systems in grain dry matter yield.
- Taxon
- barley/pea
Lathyrus oleraceusHordeum vulgaree0 - Treatment
- Organic systemse0
- Outcome
- grain DM yielde0
- Direction
- no differencese0
- Comparator
- conventional systemse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Organic systems with varying use of manure and catch crops had lower spring barley grain DM yield compared to those in conventional systems, whereas barley/pea showed no differences”
Claim · model-written summary
The largest benefits were observed for grain N yield and grain dry matter yield of spring barley.
- Taxon
- spring barleyHordeum vulgaree0
- Outcome
- grain N yields and grain DM yieldse0
- Qualifier
- largest benefitse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The largest benefits were observed for grain N yields and grain DM yields for spring barley”
Claim · model-written summary
In spring barley, grain N yield was positively correlated with root N.
- Taxon
- spring barleyHordeum vulgaree0
- Compound
- root Ne0
- Outcome
- grain N yielde0
- Direction
- positively correlatede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“grain N yields and grain DM yields for spring barley, where grain N yield was positively correlated with root N”
Claim · model-written summary
Including catch crops in organic rotations resulted in higher root N and soil organic carbon in fine particulate organic matter under barley/pea.
- Taxon
- barley/peaLathyrus oleraceusHordeum vulgaree0
- Treatment
- inclusion of catch crops in organic rotationse0
- Outcome
- root N and SOC (g C/m 2 ) in fine POMe0
- Direction
- highere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The inclusion of catch crops in organic rotations resulted in higher root N and SOC (g C/m 2 ) in fine POM in soils under barley/pea”
Claim · model-written summary
Manure application and inclusion of catch crops improve crop N supply, according to the authors.
- Taxon
- crope0
- Treatment
- manure application and inclusion of catch cropse0
- Outcome
- crop N supplye0
- Direction
- improvee0
Not reportedComparator
Verbatim
e0“manure application and inclusion of catch crops improve crop N supply and reduce the yield gap between conventional and organic rotations”
Claim · model-written summary
Manure application and inclusion of catch crops reduce the yield gap between conventional and organic rotations, according to the authors.
Verbatim
e0“manure application and inclusion of catch crops improve crop N supply and reduce the yield gap between conventional and organic rotations”
Claim · model-written summary
Management practices aimed at increasing grain N could also increase root N and thus enhance N supply for subsequent crops.
Verbatim
e0“management practices aimed at increasing grain N could also increase root N and thus enhance N supply for subsequent crops”
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