Abstract
Abstract A two‐year field study was undertaken with clusterbean ( Cyamopsis tetragonoloba L. Taub. cv. RGC‐936) under rainfed conditions. The experiments were set up in a split‐split‐plot design with three levels of phosphorus (0, 20, and 40 kg ha –1 ) and two levels of nitrogen (0 and 20 kg ha –1 ) with and without thiourea application (seed treatment with 500 mg kg –1 followed by two foliar sprays of 1000 mg kg –1 each at 25 and 40 d after sowing). The years varied in their pattern of precipitation and, consequently, in the available soil moisture at different growth stages. Phosphorous (P) and nitrogen (N) application either alone or in combination with thiourea resulted in significantly higher net photosynthetic rates and concentrations of chlorophyll, starch, soluble protein, and total free amino acids as well as nitrate reductase activity compared to control plants at both vegetative and flowering stages. However, the magnitude of favorable changes varied with soil moisture due to varying rainfall, and the effects of N, P, and thiourea were generally more pronounced in the vegetative stage. Seed yield, dry‐matter production, harvest index, and water‐use efficiency were significantly enhanced by the above mentioned treatments. The favorable effects of the treatments were realized through significant improvements of metabolic efficiency and maintenance of higher photosynthesis and nitrate reductase activity for more efficient N utilization. It is concluded that the improvement of P and N status of arid‐zone soils coupled with thiourea application can significantly improve the yield of clusterbean under rainfed conditions, though the potential gains may vary with soil‐moisture availability.
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Claims 8
Claim · model-written summary
P, N and thiourea treatments increased net photosynthetic rate, chlorophyll and starch versus control.
- Taxon
- clusterbean
Cyamopsis tetragonolobat0 - Organ / stage
- vegetative and flowering stagese0
- Treatment
- Phosphorous (P) and nitrogen (N) application either alone or in combination with thioureae0
- Outcome
- net photosynthetic rates and concentrations of chlorophyll, starche0
- Direction
- highere0
- Comparator
- control plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Phosphorous (P) and nitrogen (N) application either alone or in combination with thiourea resulted in significantly higher net photosynthetic rates and concentrations of chlorophyll, starch, soluble protein, and total free amino acids as well as nitrate reductase activity compared to control plants at both vegetative and flowering stages.”
t0“clusterbean”
Claim · model-written summary
P, N and thiourea treatments increased soluble protein, amino acids and nitrate reductase activity versus control.
- Taxon
- clusterbeanCyamopsis tetragonolobat0
- Organ / stage
- vegetative and flowering stagese0
- Treatment
- Phosphorous (P) and nitrogen (N) application either alone or in combination with thioureae0
- Outcome
- soluble protein, and total free amino acids as well as nitrate reductase activitye0
- Direction
- highere0
- Comparator
- control plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Phosphorous (P) and nitrogen (N) application either alone or in combination with thiourea resulted in significantly higher net photosynthetic rates and concentrations of chlorophyll, starch, soluble protein, and total free amino acids as well as nitrate reductase activity compared to control plants at both vegetative and flowering stages.”
t0“clusterbean”
Claim · model-written summary
Treatment effects varied with soil moisture from rainfall.
- Taxon
- clusterbeanCyamopsis tetragonolobat0
- Outcome
- magnitude of favorable changese0
- Setting
- soil moisturee0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the magnitude of favorable changes varied with soil moisture due to varying rainfall”
t0“clusterbean”
Claim · model-written summary
N, P and thiourea effects were more pronounced at the vegetative stage.
- Taxon
- clusterbeanCyamopsis tetragonolobat0
- Organ / stage
- vegetative stagee0
- Outcome
- effects of N, P, and thioureae0
- Direction
- more pronouncede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the effects of N, P, and thiourea were generally more pronounced in the vegetative stage.”
t0“clusterbean”
Claim · model-written summary
Treatments significantly enhanced seed yield and dry matter production.
- Taxon
- clusterbeanCyamopsis tetragonolobat0
- Treatment
- above mentioned treatmentse0
- Outcome
- Seed yield, dry‐matter productione0
- Direction
- enhancede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Seed yield, dry‐matter production, harvest index, and water‐use efficiency were significantly enhanced by the above mentioned treatments.”
t0“clusterbean”
Claim · model-written summary
Treatments significantly enhanced harvest index and water use efficiency.
- Taxon
- clusterbeanCyamopsis tetragonolobat0
- Treatment
- above mentioned treatmentse0
- Outcome
- harvest index, and water‐use efficiencye0
- Direction
- enhancede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Seed yield, dry‐matter production, harvest index, and water‐use efficiency were significantly enhanced by the above mentioned treatments.”
t0“clusterbean”
Claim · model-written summary
Authors attribute favorable effects to improved metabolic efficiency, photosynthesis and nitrate reductase activity.
- Taxon
- clusterbeanCyamopsis tetragonolobat0
- Outcome
- favorable effectse0
- Qualifier
- significant improvements of metabolic efficiency and maintenance of higher photosynthesis and nitrate reductase activitye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The favorable effects of the treatments were realized through significant improvements of metabolic efficiency and maintenance of higher photosynthesis and nitrate reductase activity for more efficient N utilization.”
t0“clusterbean”
Claim · model-written summary
Authors conclude improved P and N soil status with thiourea can improve rainfed clusterbean yield, depending on soil moisture.
- Taxon
- clusterbeanCyamopsis tetragonolobat0
- Outcome
- yield of clusterbeane0
- Qualifier
- potential gains may vary with soil‐moisture availabilitye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“improvement of P and N status of arid‐zone soils coupled with thiourea application can significantly improve the yield of clusterbean under rainfed conditions, though the potential gains may vary with soil‐moisture availability.”
t0“clusterbean”
The same questions in other papers
thiourea · physiology: photosynthesis · Cyamopsis tetragonoloba (cluster bean)Results agree
2 papers in the same direction as this paper
- positive
- positive
nitrogen · physiology: photosynthesis · Cyamopsis tetragonoloba (cluster bean)Results agree
1 paper in the same direction as this paper
- positive
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.