Abstract
Abstract Catch crops are generally regarded as an efficient tool to reduce nitrate leaching. However, the benefits need to be balanced against potential adverse effects on the main crop yields. The objectives of the study were to study three contrasting catch crops, that is, dyer's woad ( DW ) ( I satis tinctoria L .), perennial ryegrass ( RG ) ( L olium perenne L .) and fodder radish ( FR ) ( R aphanus sativus L .) under three tillage systems. For that, we used a tillage experiment established in 2002 on a Danish sandy loam. The tillage treatments were direct drilling ( D ), harrowing to 8–10 cm ( H ) and ploughing ( P ). Above‐ground biomass production and N uptake were measured in the catch crops and the main crop. Catch crop root growth was studied using both minirhizotron and core methods. Soil penetration resistance was recorded to 60 cm depth. Fodder radish and RG produced up to 1800 kg/ha dry matter and DW 900 kg/ha. The nitrogen uptake in November was 55, 37 and 31 kg N/ha for FR , RG and DW , respectively, when averaged across the 2 yr of study. The yield of the spring barley main crop was in general highest where FR was grown as a catch crop. Ploughing tended to result in highest yields although differences were only significant in 2008. The minirhizotron root measurements showed that the crucifers FR and DW achieved better subsoil rooting than RG . In contrast, the soil core data showed no significant difference between FR and RG in subsoil root growth. Our study highlights the need for further studies on subsoil root growth of different catch crops.
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Claims 11
Claim · model-written summary
Fodder radish produced up to 1800 kg/ha dry matter.
Verbatim
e0“Fodder radish and RG produced up to 1800 kg/ha dry matter”
Claim · model-written summary
Perennial ryegrass produced up to 1800 kg/ha dry matter.
- Taxon
- perennial ryegrass
Lolium perennee1 - Outcome
- dry mattere0
- Value
- up to 1800 kg/hae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Fodder radish and RG produced up to 1800 kg/ha dry matter”
e1“perennial ryegrass ( RG )”
Claim · model-written summary
Dyer's woad produced 900 kg/ha dry matter.
Verbatim
e0“DW 900 kg/ha.”
e1“dyer's woad ( DW )”
Claim · model-written summary
Fodder radish took up 55 kg N/ha in November, averaged over two years.
Verbatim
e0“The nitrogen uptake in November was 55, 37 and 31 kg N/ha for FR , RG and DW , respectively, when averaged across the 2 yr of study.”
e1“fodder radish ( FR )”
Claim · model-written summary
Perennial ryegrass took up 37 kg N/ha in November, averaged over two years.
- Taxon
- perennial ryegrassLolium perennee1
- Outcome
- nitrogen uptakee0
- Value
- 37e0
- Qualifier
- Novembere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The nitrogen uptake in November was 55, 37 and 31 kg N/ha for FR , RG and DW , respectively, when averaged across the 2 yr of study.”
e1“perennial ryegrass ( RG )”
Claim · model-written summary
Dyer's woad took up 31 kg N/ha in November, averaged over two years.
Verbatim
e0“The nitrogen uptake in November was 55, 37 and 31 kg N/ha for FR , RG and DW , respectively, when averaged across the 2 yr of study.”
e1“dyer's woad ( DW )”
Claim · model-written summary
Spring barley yield was generally highest after fodder radish.
- Taxon
- spring barley
.jpg?width=60)
Hordeum vulgaree0 - Treatment
- FRe0
- Outcome
- yielde0
- Direction
- higheste0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“The yield of the spring barley main crop was in general highest where FR was grown as a catch crop.”
e1“fodder radish ( FR )”
Claim · model-written summary
Ploughing tended to give the highest yields, with significant differences only in 2008.
- Taxon
- spring barleyHordeum vulgaree1
- Treatment
- Ploughinge0
- Outcome
- yieldse0
- Direction
- higheste0
- Qualifier
- only significant in 2008e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Ploughing tended to result in highest yields although differences were only significant in 2008.”
e1“spring barley main crop”
Claim · model-written summary
Minirhizotron measurements found better subsoil rooting for fodder radish than perennial ryegrass.
Verbatim
e0“The minirhizotron root measurements showed that the crucifers FR and DW achieved better subsoil rooting than RG .”
e1“fodder radish ( FR )”
Claim · model-written summary
Minirhizotron measurements found better subsoil rooting for dyer's woad than perennial ryegrass.
Verbatim
e0“The minirhizotron root measurements showed that the crucifers FR and DW achieved better subsoil rooting than RG .”
e1“dyer's woad ( DW )”
Claim · model-written summary
Soil core data found no significant subsoil root growth difference between fodder radish and perennial ryegrass.
Verbatim
e0“In contrast, the soil core data showed no significant difference between FR and RG in subsoil root growth.”
e1“fodder radish ( FR )”
The same questions in other papers
tillage · yield · Hordeum vulgare (barley)Positive and negative results
104 papers in the same direction as this paper · 43 in the opposite direction · 13 reporting no difference from an alternative
- no effect
- no effect
- negative
157 papers more in this group
See all 161 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.