Abstract
Annual crop legumes, grown in rotation with cereal crops, contribute to the total pool of nitrogen in the soil and improve the yield of cereals. The present study aimed at the quantification of nitrogen fixation by mungbean and blackgram using 15N isotopic dilution methodology; and the quantification of grain and nitrogen yield differences of succeeding rice and wheat crops compared with a cereal–cereal rotation. There were 2 experiments in separate fields but with the same layout: in experiment 1, rice followed the mungbean and blackgram varieties and in experiment 2, wheat followed the mungbean and blackgram varieties. Nitrogen fixed ranged from 26 to 36 kg/ha in experiment 1 and from 30 to 36 kg/ha in experiment 2. Soil nitrogen spared by legume crops ranged from 2 to 26 kg/ha in experiment 1 and from 4 to 23 kg/ha in experiment 2. Rice paddy yields were 0.6–1.1 t/ha higher in the legume–cereal rotation than in the cereal–cereal sequence. Similarly, wheat grain yields were 0.5–1.1 t/ha higher in the legume–cereal rotation.
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Claims 6
Claim · model-written summary
Legume nitrogen fixation ranged from 26 to 36 kg/ha in experiment 1.
- Taxon
- mungbean
.jpg?width=60)
Vigna radiatat0 - Outcome
- Nitrogen fixede0
- Value
- 26 to 36 kg/hae0
- Qualifier
- experiment 1e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“Nitrogen fixed ranged from 26 to 36 kg/ha in experiment 1”
t0“mungbean ( Vigna radiata ) and blackgram ( Vigna mungo )”
Claim · model-written summary
Legume nitrogen fixation ranged from 30 to 36 kg/ha in experiment 2.
- Taxon
- blackgram
Vigna mungot0 - Outcome
- Nitrogen fixede1
- Value
- 30 to 36 kg/hae0
- Qualifier
- experiment 2e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“from 30 to 36 kg/ha in experiment 2”
e1“Nitrogen fixed ranged from 26 to 36 kg/ha in experiment 1”
t0“mungbean ( Vigna radiata ) and blackgram ( Vigna mungo )”
Claim · model-written summary
Legumes spared 2 to 26 kg/ha soil nitrogen in experiment 1.
- Taxon
- mungbeanVigna radiatat0
- Outcome
- Soil nitrogen sparede0
- Value
- 2 to 26 kg/hae0
- Qualifier
- experiment 1e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Soil nitrogen spared by legume crops ranged from 2 to 26 kg/ha in experiment 1”
t0“mungbean ( Vigna radiata ) and blackgram ( Vigna mungo )”
Claim · model-written summary
Legumes spared 4 to 23 kg/ha soil nitrogen in experiment 2.
- Taxon
- blackgramVigna mungot0
- Outcome
- Soil nitrogen sparede1
- Value
- 4 to 23 kg/hae0
- Qualifier
- experiment 2e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“from 4 to 23 kg/ha in experiment 2”
e1“Soil nitrogen spared by legume crops ranged from 2 to 26 kg/ha in experiment 1”
t0“mungbean ( Vigna radiata ) and blackgram ( Vigna mungo )”
Claim · model-written summary
Rice paddy yield was 0.6–1.1 t/ha higher after legumes.
- Taxon
- Rice
Oryza sativae0 - Treatment
- legume–cereal rotatione0
- Outcome
- paddy yieldse0
- Direction
- highere0
- Value
- 0.6–1.1 t/hae0
- Comparator
- cereal–cereal sequencee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Rice paddy yields were 0.6–1.1 t/ha higher in the legume–cereal rotation than in the cereal–cereal sequence”
Claim · model-written summary
Wheat grain yield was 0.5–1.1 t/ha higher after legumes.
- Taxon
- wheat
Triticum aestivume0 - Treatment
- legume–cereal rotatione0
- Outcome
- grain yieldse0
- Direction
- highere0
- Value
- 0.5–1.1 t/hae0
- Comparator
- cereal–cereal sequencee1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“wheat grain yields were 0.5–1.1 t/ha higher in the legume–cereal rotation”
e1“cereal–cereal sequence”
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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.