Abstract
Core Ideas Rotational effects of grain and green manure legumes were evaluated for three subsequent crops. The effects of grain legumes were more pronounced in the third crop than the first two. The removal of aboveground crop residues did not affect the rotational effects. Non-N and belowground N related factors seem to have contributed to the effects. Nonlegume crop responses to legume crops are usually studied only in one subsequent crop. We determined the rotational effects of green and forage pea (Pisum sativum L.), faba bean (Vicia faba L.) grown for seed, faba green manure (GM), and chickling vetch (Lathyrus sativus L.) GM on three subsequent crops. The control crop in the legume year was barley (Hordeum vulgare L.), and the subsequent crops grown consecutively were wheat (Triticum aestivum L.), canola (Brassica napus L.), and barley, all fertilized with 0, 30, 60, and 120 kg N ha−1. In wheat, N uptake (73–84 vs. 48 kg grain + straw N ha−1), C accumulation, straw dry matter (DM), and grain yields (2695–3136 vs. 1950 kg DM ha−1) increased where the preceding crop was a legume relative to a barley preceding crop. In canola, grain C accumulation and grain yield did not respond to the legume crop residues. In barley, all the measured parameters were greater on pulse crop residues than on GM residues. Therefore, the rotational effects of pulse crop residues were more pronounced in the third subsequent crop than in the first two. However, removal of aboveground crop residues did not affect N uptake, C accumulation, or yields of any subsequent crop, suggesting that belowground N sources were a major pathway of N transfer from legumes to subsequent crops. With the exception of canola straw C, crops grown on legume residues and those grown on barley residues responded similarly to increasing N rate, suggesting that non-N-related factors contributed to the responses.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 12
Claim · model-written summary
Wheat nitrogen uptake rose after legumes versus barley.
- Taxon
- wheat
Triticum aestivume0 - Treatment
- preceding crop was a legumee0
- Outcome
- N uptakee0
- Direction
- increasede0
- Value
- 73–84 vs. 48 kg grain + straw N ha−1e0
- Comparator
- barley preceding crope0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In wheat, N uptake (73–84 vs. 48 kg grain + straw N ha−1), C accumulation, straw dry matter (DM), and grain yields (2695–3136 vs. 1950 kg DM ha−1) increased where the preceding crop was a legume relative to a barley preceding crop”
Claim · model-written summary
Wheat carbon accumulation increased after legumes versus barley.
- Taxon
- wheatTriticum aestivume0
- Treatment
- preceding crop was a legumee0
- Outcome
- C accumulatione0
- Direction
- increasede0
- Comparator
- barley preceding crope0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In wheat, N uptake (73–84 vs. 48 kg grain + straw N ha−1), C accumulation, straw dry matter (DM), and grain yields (2695–3136 vs. 1950 kg DM ha−1) increased where the preceding crop was a legume relative to a barley preceding crop”
Claim · model-written summary
Wheat straw dry matter increased after legumes versus barley.
- Taxon
- wheatTriticum aestivume0
- Treatment
- preceding crop was a legumee0
- Outcome
- straw dry matter (DM)e0
- Direction
- increasede0
- Comparator
- barley preceding crope0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In wheat, N uptake (73–84 vs. 48 kg grain + straw N ha−1), C accumulation, straw dry matter (DM), and grain yields (2695–3136 vs. 1950 kg DM ha−1) increased where the preceding crop was a legume relative to a barley preceding crop”
Claim · model-written summary
Wheat grain yield increased after legumes versus barley.
- Taxon
- wheatTriticum aestivume0
- Treatment
- preceding crop was a legumee0
- Outcome
- grain yieldse0
- Direction
- increasede0
- Value
- 2695–3136 vs. 1950 kg DM ha−1e0
- Comparator
- barley preceding crope0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In wheat, N uptake (73–84 vs. 48 kg grain + straw N ha−1), C accumulation, straw dry matter (DM), and grain yields (2695–3136 vs. 1950 kg DM ha−1) increased where the preceding crop was a legume relative to a barley preceding crop”
Claim · model-written summary
Canola grain carbon accumulation did not respond to legume residues.
- Taxon
- canola
.jpg?width=60)
Brassica napus var. napuse0 - Treatment
- legume crop residuese0
- Outcome
- grain C accumulatione0
- Direction
- did not responde0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“In canola, grain C accumulation and grain yield did not respond to the legume crop residues”
Claim · model-written summary
Canola grain yield did not respond to legume residues.
- Taxon
- canolaBrassica napus var. napuse0
- Treatment
- legume crop residuese0
- Outcome
- grain yielde0
- Direction
- did not responde0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In canola, grain C accumulation and grain yield did not respond to the legume crop residues”
Claim · model-written summary
Measured barley parameters were greater after pulse than green manure residues.
- Taxon
- barley
.jpg?width=60)
Hordeum vulgaree0 - Treatment
- pulse crop residuese0
- Outcome
- all the measured parameterse0
- Direction
- greatere0
- Comparator
- GM residuese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“In barley, all the measured parameters were greater on pulse crop residues than on GM residues”
Claim · model-written summary
Pulse residue rotational effects were more pronounced in the third subsequent crop than in the first two.
Verbatim
e0“rotational effects of pulse crop residues were more pronounced in the third subsequent crop than in the first two”
Claim · model-written summary
Removing aboveground residues did not affect subsequent crop nitrogen uptake, carbon accumulation or yield.
- Taxon
- crope0
- Treatment
- removal of aboveground crop residuese0
- Outcome
- N uptake, C accumulation, or yieldse0
- Direction
- did not affecte0
Not reportedComparator
Verbatim
e0“removal of aboveground crop residues did not affect N uptake, C accumulation, or yields of any subsequent crop”
Claim · model-written summary
Belowground nitrogen sources were suggested as a major transfer pathway from legumes to later crops.
Verbatim
e0“belowground N sources were a major pathway of N transfer from legumes to subsequent crops”
Claim · model-written summary
Except canola straw carbon, crops on legume and barley residues responded similarly to increasing nitrogen rate.
Verbatim
e0“With the exception of canola straw C, crops grown on legume residues and those grown on barley residues responded similarly to increasing N rate”
Claim · model-written summary
Non-nitrogen factors were suggested to contribute to crop responses.
Not reportedTaxon
Verbatim
e0“non-N-related factors contributed to the responses”
The same questions in other papers
organic · molecular: metabolites · Brassica napus (oilseed rape)Positive and negative results
1 paper in the same direction as this paper · 2 in the opposite direction
- positive
- positive
- no effect
rotation · molecular: metabolites · Triticum aestivum (wheat)Positive and negative results
12 papers in the same direction as this paper · 4 in the opposite direction · 2 reporting no difference from an alternative
- negative
- negative
- no effect
15 papers more in this group
See all 19 papers →organic · yield · Brassica napus (oilseed rape)Positive and negative results
1 paper in the same direction as this paper · 22 in the opposite direction
- positive
- positive
- positive
20 papers more in this group
See all 24 papers →rotation · growth · Triticum aestivum (wheat)Positive and negative results
17 papers in the same direction as this paper · 9 in the opposite direction · 2 reporting no difference from an alternative
- no effect
- no effect
- negative
25 papers more in this group
See all 29 papers →rotation · nutrient: content · Triticum aestivum (wheat)Positive and negative results
24 papers in the same direction as this paper · 10 in the opposite direction
- negative
- no effect
- negative
31 papers more in this group
See all 35 papers →rotation · yield · Triticum aestivum (wheat)Positive and negative results
252 papers in the same direction as this paper · 83 in the opposite direction · 9 reporting no difference from an alternative
- positive
- positive
- no effect
341 papers more in this group
See all 345 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.