Abstract
Cropping systems comprising winter catch crops followed by spring wheat could reduce N leaching risks compared to traditional winter wheat systems in humid climates. We studied the soil mineral N (N inorg ) and root growth of winter– and spring wheat to 2.5 m depth during 3 years. The roots of the winter and spring wheat penetrated the soil at a similar rate (1.3 mm o C day −1 ) and by virtue of its longer growing period, winter wheat reached depths of 2.2 m, twice that of spring wheat (1.1 m). The deeper rooting of winter wheat was related to much lower amounts of N inorg left in the 1 to 2.5 m layer after winter wheat (81 kg N inorg ha −1 less). When growing winter catch crops before spring wheat, N content in the 1 to 2.5 m layer after spring wheat was not different from that after winter wheat. The results suggest that due to its deep rooting, winter wheat may not lead to as high levels of leaching as it is often assumed in humid climates. Deep soil and root measurements (below 1 m) in this experiment were essential to answer the questions we posed.
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Claims 6
Claim · model-written summary
Winter and spring wheat roots penetrated soil at a similar rate of 1.3 mm o C day −1.
- Taxon
- wheat
Triticum aestivume0 - Outcome
- penetrated the soile0
- Direction
- similar ratee0
- Value
- 1.3 mm o C day −1e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The roots of the winter and spring wheat penetrated the soil at a similar rate (1.3 mm o C day −1 )”
Claim · model-written summary
Winter wheat roots reached 2.2 m, twice the depth of spring wheat roots at 1.1 m.
- Taxon
- wheatTriticum aestivume0
- Material
- winter wheate0
- Outcome
- depthse0
- Direction
- twicee0
- Value
- 2.2 me0
- Qualifier
- 1.1 me0
- Comparator
- spring wheate0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“winter wheat reached depths of 2.2 m, twice that of spring wheat (1.1 m)”
Claim · model-written summary
Deeper winter wheat rooting was associated with 81 kg N inorg ha −1 less residual mineral nitrogen in the 1 to 2.5 m soil layer.
- Taxon
- wheatTriticum aestivume0
- Material
- winter wheate0
- Outcome
- N inorg left in the 1 to 2.5 m layere0
- Direction
- much lowere0
- Value
- 81 kg N inorg ha −1 lesse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The deeper rooting of winter wheat was related to much lower amounts of N inorg left in the 1 to 2.5 m layer after winter wheat (81 kg N inorg ha −1 less)”
Claim · model-written summary
Residual nitrogen in the 1 to 2.5 m layer after spring wheat preceded by winter catch crops did not differ from that after winter wheat.
- Taxon
- wheatTriticum aestivume0
- Treatment
- winter catch crops before spring wheate0
- Outcome
- N content in the 1 to 2.5 m layere0
- Direction
- not differente0
- Comparator
- winter wheate0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“When growing winter catch crops before spring wheat, N content in the 1 to 2.5 m layer after spring wheat was not different from that after winter wheat”
Claim · model-written summary
The authors suggest winter wheat may have lower leaching potential than commonly assumed in humid climates because of deep rooting.
- Taxon
- wheatTriticum aestivume0
- Outcome
- may not lead to as high levels of leachinge0
- Qualifier
- in humid climatese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“due to its deep rooting, winter wheat may not lead to as high levels of leaching as it is often assumed in humid climates”
Claim · model-written summary
Measurements of roots and soil below 1 m were essential to address the study questions.
Verbatim
e0“Deep soil and root measurements (below 1 m) in this experiment were essential to answer the questions we posed”
The same questions in other papers
cover crop · nutrient: content · Triticum aestivum (wheat)Positive and negative results
1 paper in the same direction as this paper · 6 reporting no difference from an alternative
- positive
- positive
- positive
4 papers more in this group
See all 8 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.