Abstract
Background: Elevated temperature and water stress are the key limiting factors affecting the kidney bean yield. Climate change is projected to enhance these risks for successful crop production. However quantified information, which is limited, on temperatures stress at various growth phases in combination with water regimes, becomes important for optimizing management decisions for higher productivity of kidney bean. The current study is aimed to fill this gap. Methods: A field experiment was conducted during January-April 2020, to investigate the effect of irrigation and temperature regimes on growth parameters and yield of kidney bean. Temperature treatments imposed were elevated temperature for entire crop period i) ~4.6°C ii) ~3.1°C iii) ~2.8°C above mean ambient (19.6°C), iv) ambient temperature Tmax and Tmin regime of 25.9/13.4°C (mean 19.6°C), v) elevated temperature during pre-flowering phase (~3.7°C above mean ambient during that period, 19.6°C), vi) flowering phase (~5.3°C above mean ambient during that period, 23.1°C) and pod-filling phase (~5.2°C above mean ambient during that period, 28.9°C). These were combined with i) two irrigations (applied at sowing and seedling phase) and ii) three irrigations (additional irrigation at pod-filling phase). Result: Elevated temperature regimes led to shortening of the crop duration. LAI, NDVI, net photosynthesis and seed yield were higher in plants exposed to continuous elevated temperature. Heat shock during pre-flowering and flowering led to reduction in yield. Despite exposure to elevated temperature, supplemental irrigation led to higher yield. Seed yield loss was greater when temperature stress coincided with water stress. The negative effects of high temperature were significantly curtailed by provision of supplemental irrigation.
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Claims 8
Claim · model-written summary
Elevated temperature shortened kidney bean crop duration.
- Taxon
- Common Bean
Phaseolus vulgarist0 - Treatment
- Elevated temperature regimese0
- Outcome
- crop duratione0
- Direction
- shorteninge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Elevated temperature regimes led to shortening of the crop duration.”
t0“Common Bean”
Claim · model-written summary
Continuous elevated temperature increased LAI, NDVI and net photosynthesis.
- Taxon
- Common BeanPhaseolus vulgarist0
- Treatment
- continuous elevated temperaturee0
- Outcome
- LAI, NDVI, net photosynthesise0
- Direction
- highere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“LAI, NDVI, net photosynthesis and seed yield were higher in plants exposed to continuous elevated temperature.”
t0“Common Bean”
Claim · model-written summary
Continuous elevated temperature increased seed yield.
- Taxon
- Common BeanPhaseolus vulgarist0
- Treatment
- continuous elevated temperaturee0
- Outcome
- seed yielde0
- Direction
- highere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“LAI, NDVI, net photosynthesis and seed yield were higher in plants exposed to continuous elevated temperature.”
t0“Common Bean”
Claim · model-written summary
Pre-flowering heat shock reduced yield.
- Taxon
- Common BeanPhaseolus vulgarist0
- Treatment
- Heat shock during pre-floweringe0
- Outcome
- yielde0
- Direction
- reductione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Heat shock during pre-flowering and flowering led to reduction in yield.”
t0“Common Bean”
Claim · model-written summary
Flowering heat shock reduced yield.
- Taxon
- Common BeanPhaseolus vulgarist0
- Treatment
- Heat shock during pre-flowering and floweringe0
- Outcome
- yielde0
- Direction
- reductione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Heat shock during pre-flowering and flowering led to reduction in yield.”
t0“Common Bean”
Claim · model-written summary
Supplemental irrigation increased yield despite elevated temperature.
- Taxon
- Common BeanPhaseolus vulgarist0
- Treatment
- supplemental irrigatione0
- Outcome
- yielde0
- Direction
- highere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Despite exposure to elevated temperature, supplemental irrigation led to higher yield.”
t0“Common Bean”
Claim · model-written summary
Yield loss was greater when heat and water stress coincided.
- Taxon
- Common BeanPhaseolus vulgarist0
- Treatment
- temperature stresse0
- Outcome
- Seed yield losse0
- Direction
- greatere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Seed yield loss was greater when temperature stress coincided with water stress.”
t0“Common Bean”
Claim · model-written summary
Supplemental irrigation significantly curtailed adverse effects of high temperature.
- Taxon
- Common BeanPhaseolus vulgarist0
- Treatment
- supplemental irrigatione0
- Outcome
- negative effects of high temperaturee0
- Direction
- curtailede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The negative effects of high temperature were significantly curtailed by provision of supplemental irrigation.”
t0“Common Bean”
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