Abstract
Bueckert, R. A., Wagenhoffer, S., Hnatowich, G. and Warkentin, T. D. 2015. Effect of heat and precipitation on pea yield and reproductive performance in the field. Can. J. Plant Sci. 95: 629–639. Pea (Pisum sativum L.) is important globally as a cool season crop. Pea cultivars are heat-sensitive so our goal was to investigate how weather impacted growth and yield in recent cultivars in the Co-operative pea yield trials (2000 to 2009) for a dryland (Saskatoon) and an irrigated (Outlook) location. We explored relationships between days to maturity, days spent in reproductive growth (flowering to maturity), yield and various weather factors. Yield and the length of reproductive growth increased with seasonal precipitation. Pea was sensitive to heat but heat units did not satisfactorily describe growth and yield in all environments. Strong relationships were observed between crop growth and mean maximum daily temperature experienced during reproductive growth, and between crop growth and mean minimum temperature. The greater the mean maximum temperature (>25.5°C), the fewer the number of days (<35) spent in reproductive growth at the dryland location. At Outlook, 35 to 40 d in reproductive growth occurred in a much wider temperature range from 24.5 to 27°C, and irrigation mitigated some reduction in yield. For dryland pea, more than 20 d in the season above 28°C were associated with less time in reproductive growth and less yield. The threshold maximum temperature for yield reduction in the field was closer to 28°C than 32°C from published studies, and above 17.5°C mean seasonal daily temperature. Western Canadian cultivars currently have short lifecycles, which make them heat sensitive. Heat tolerance could be improved by earlier flowering and a longer duration of flowering via an indeterminate habit. Future research will investigate pea nodal development, flowering and abortion patterns in a range of pea cultivars in field conditions.
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Claims 13
Claim · model-written summary
Pea yield and length of reproductive growth increased with seasonal precipitation.
- Taxon
- pea
Lathyrus oleraceust0 - Treatment
- seasonal precipitatione1
- Outcome
- Yield and the length of reproductive growthe1
- Direction
- increasede1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“pea yield”
e1“Yield and the length of reproductive growth increased with seasonal precipitation”
Claim · model-written summary
At the dryland site, a greater mean maximum temperature (>25.5°C) went with fewer days in reproductive growth.
- Taxon
- peaLathyrus oleraceust0
- Treatment
- mean maximum temperature (>25.5°C)e3
- Outcome
- number of days (<35) spent in reproductive growthe3
- Direction
- fewere3
- Setting
- dryland locatione3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“pea yield”
e3“The greater the mean maximum temperature (>25.5°C), the fewer the number of days (<35) spent in reproductive growth at the dryland location”
Claim · model-written summary
For dryland pea, more than 20 days above 28°C went with less time in reproductive growth and less yield.
- Taxon
- peaLathyrus oleraceust0
- Treatment
- more than 20 d in the season above 28°Ce4
- Outcome
- time in reproductive growthe4
- Direction
- lesse4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“pea yield”
e4“For dryland pea, more than 20 d in the season above 28°C were associated with less time in reproductive growth and less yield”
Claim · model-written summary
At Outlook, 35 to 40 days of reproductive growth occurred over a much wider temperature range, 24.5 to 27°C.
- Taxon
- peaLathyrus oleraceust0
- Outcome
- reproductive growthe5
- Value
- 35 to 40 de5
- Qualifier
- temperature range from 24.5 to 27°Ce5
- Setting
- Outlooke5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“pea yield”
e5“At Outlook, 35 to 40 d in reproductive growth occurred in a much wider temperature range from 24.5 to 27°C”
Claim · model-written summary
Irrigation mitigated some of the yield reduction at Outlook.
- Taxon
- peaLathyrus oleraceust0
- Treatment
- irrigatione6
- Outcome
- reduction in yielde6
- Direction
- mitigatede6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“pea yield”
e6“irrigation mitigated some reduction in yield”
Claim · model-written summary
The threshold maximum temperature for yield reduction in the field was closer to 28°C than 32°C from published studies.
- Taxon
- peaLathyrus oleraceust0
- Outcome
- threshold maximum temperature for yield reductione7
- Value
- 28°Ce7
- Comparator
- 32°C from published studiese7
- Setting
- in the fielde7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“pea yield”
e7“The threshold maximum temperature for yield reduction in the field was closer to 28°C than 32°C from published studies”
Claim · model-written summary
A mean seasonal daily temperature above 17.5°C is reported as a threshold for pea.
- Taxon
- peaLathyrus oleraceust0
- Outcome
- mean seasonal daily temperaturee1
- Value
- 17.5°Ce1
- Qualifier
- above 17.5°Ce1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“pea yield”
e1“above 17.5°C mean seasonal daily temperature”
Claim · model-written summary
Heat units did not satisfactorily describe pea growth and yield in all environments.
- Taxon
- peaLathyrus oleraceust0
- Outcome
- describe growth and yielde1
- Qualifier
- in all environmentse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“pea yield”
e1“heat units did not satisfactorily describe growth and yield in all environments”
Claim · model-written summary
Pea was sensitive to heat.
- Taxon
- PeaLathyrus oleraceuse1
- Outcome
- sensitive to heate1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Pea was sensitive to heat”
Claim · model-written summary
Crop growth was strongly related to mean maximum daily temperature during reproductive growth.
- Taxon
- peaLathyrus oleraceust0
- Treatment
- mean maximum daily temperature experienced during reproductive growthe1
- Outcome
- crop growthe1
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“pea yield”
e1“Strong relationships were observed between crop growth and mean maximum daily temperature experienced during reproductive growth, and between crop growth and mean minimum temperature”
Claim · model-written summary
Crop growth was strongly related to mean minimum temperature.
- Taxon
- peaLathyrus oleraceust0
- Treatment
- mean minimum temperaturee1
- Outcome
- crop growthe1
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“pea yield”
e1“Strong relationships were observed between crop growth and mean maximum daily temperature experienced during reproductive growth, and between crop growth and mean minimum temperature”
Claim · model-written summary
Western Canadian cultivars have short lifecycles, which make pea heat sensitive.
- Taxon
- peaLathyrus oleraceust0
- Outcome
- heat sensitivee1
- Qualifier
- short lifecyclese1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“pea yield”
e1“Western Canadian cultivars currently have short lifecycles, which make them heat sensitive”
Claim · model-written summary
Heat tolerance could be improved by earlier flowering and a longer flowering duration from an indeterminate habit.
- Taxon
- peaLathyrus oleraceust0
- Outcome
- Heat tolerancee1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“pea yield”
e1“Heat tolerance could be improved by earlier flowering and a longer duration of flowering via an indeterminate habit”
The same questions in other papers
irrigation · yield · Lathyrus oleraceus (pea)Results differ
45 papers in the same direction as this paper · 6 in the opposite direction
- no effect
- negative
- negative
48 papers more in this group
See all 52 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.