Abstract
Grain legumes are protein rich break crops for cerealdominated rotations. The low stability of yield and the risk of residual nitrate leaching after their cultivation are well known. The aim of this study was to examine the correlations between grain yield or protein yield and the amount of mineral nitrogen (Nmin) left in the soil after harvest. Sixteen present-day cultivars of each faba bean and pea were studied across six environments (three locations in Germany in 1996 and 1997) at two N levels (0 kg ha–1, 200 kg ha–1). Hence, there were 12 test-conditions for a detailed investigation of genotype × test-condition interaction. Cultivars of both crops differed significantly for grain yield, protein concentration in grains, protein yield, and Nmin after harvest. N fertilisation significantly increased the Nmin values after both crops and also the protein concentration in grains and the protein yield for pea. For both grain legumes, negative correlations were detected between grain yield or protein yield and Nmin after harvest. Correlations were stronger with the N200 level. Genetic improvement of grain yield seems to be accompanied by a decrease of Nmin values after harvest. Moderate interactions between genotypes and test-conditions for all traits were verified in the experiments. Cultivars of both crops were separated into two groups. Conventional type faba bean cultivars expressed higher yields and left less Nmin after harvest than cultivars with deviating morphological properties. Semi-leafless pea cultivars showed higher yields with superior stability and smaller amounts of Nmin after harvest than normal-leaf pea cultivars. The AMMI (Additive Main effects and Multiplicative Interaction) analysis allowed for a visual inspection of the impact of the N fertilisation level on the Nmin interaction pattern genotypes × test-conditions.
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Claims 9
Claim · model-written summary
Cultivars of both crops differed significantly in grain yield, grain protein concentration, protein yield and residual Nmin.
Verbatim
e0“Cultivars of both crops differed significantly for grain yield, protein concentration in grains, protein yield, and Nmin after harvest”
Claim · model-written summary
Nitrogen fertilisation increased residual Nmin after both crops.
Not reportedComparator
Verbatim
e0“N fertilisation significantly increased the Nmin values after both crops”
Claim · model-written summary
Nitrogen fertilisation increased grain protein concentration and protein yield in pea.
- Taxon
- pea
Lathyrus oleraceuse0 - Treatment
- N fertilisatione0
- Outcome
- protein concentration in grains and the protein yielde0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“N fertilisation significantly increased the Nmin values after both crops and also the protein concentration in grains and the protein yield for pea”
Claim · model-written summary
Grain and protein yield correlated negatively with postharvest Nmin for both legumes.
Verbatim
e0“For both grain legumes, negative correlations were detected between grain yield or protein yield and Nmin after harvest”
Claim · model-written summary
Yield–Nmin correlations were stronger at N200.
Not reportedTaxon
Verbatim
e0“Correlations were stronger with the N200 level”
Claim · model-written summary
Genotype-by-test-condition interactions were moderate for all traits.
- Outcome
- interactions between genotypes and test-conditions for all traitse0
Not reportedTaxon
Verbatim
e0“Moderate interactions between genotypes and test-conditions for all traits were verified”
Claim · model-written summary
Conventional faba bean cultivars had higher yields and less residual Nmin than morphologically different cultivars.
- Taxon
- faba bean
Vicia fabae0 - Material
- Conventional type faba bean cultivarse0
- Outcome
- higher yields and left less Nmin after harveste0
- Direction
- highere0
- Comparator
- cultivars with deviating morphological propertiese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Conventional type faba bean cultivars expressed higher yields and left less Nmin after harvest than cultivars with deviating morphological properties”
Claim · model-written summary
Semi-leafless pea cultivars had higher and more stable yields and less residual Nmin than normal-leaf cultivars.
- Taxon
- peaLathyrus oleraceuse0
- Material
- Semi-leafless pea cultivarse0
- Outcome
- yields with superior stability and smaller amounts of Nmin after harveste0
- Direction
- highere0
- Comparator
- normal-leaf pea cultivarse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Semi-leafless pea cultivars showed higher yields with superior stability and smaller amounts of Nmin after harvest than normal-leaf pea cultivars”
Claim · model-written summary
AMMI analysis enabled visual inspection of nitrogen-level effects on genotype-by-condition Nmin interactions.
- Outcome
- visual inspection of the impact of the N fertilisation level on the Nmin interaction pattern genotypes × test-conditionse0
Not reportedTaxonComparatorValue
Verbatim
e0“The AMMI (Additive Main effects and Multiplicative Interaction) analysis allowed for a visual inspection of the impact of the N fertilisation level on the Nmin interaction pattern genotypes × test-conditions”
The same questions in other papers
fertilization · quality: protein · Lathyrus oleraceus (pea)Results differ
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See all 27 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.