Abstract
Managing irrigation using soil moisture sensors for automation can allow for a reduction in water use while avoiding drought stress and maintaining optimum yields in high-value crops. Measurements of plant water status such as leaf water potential and relative water content are often utilized to demonstrate the presence or lack of drought stress in plants subjected to varying soil moisture regimes. Poblano peppers (Capsicum annuum L.) were grown under four automated, tensiometer-controlled irrigation regimes with set points of on/off −30/−25, −40/−35, −50/−45, and −60/−55 kPa and a manually operated treatment with set points of −50/−10 kPa. Soil moisture data were collected at depths of 15 and 25 cm and plant midday leaf water potential and relative water content data were collected throughout the growing season. Yield and fruit quality were unaffected by irrigation treatment. Soil water potential was poorly correlated with plant leaf water potential and relative water content. Plant leaf water potential and relative water content were well correlated with the following environmental factors: air temperature, relative humidity, dew point temperature, and solar radiation. These data indicate that in a non-drought-stressed production system leaf water potential and relative water content may be poor indicators of soil water status because they may be affected by environmental variables to a greater extent than by soil moisture.
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Claims 5
Claim · model-written summary
Yield and fruit quality of poblano peppers were unaffected by the tensiometer-controlled irrigation regimes compared with a manually operated treatment.
- Taxon
- Capsicum annuum
Capsicum annuume1 - Treatment
- tensiometer-controlled irrigation regimese1
- Outcome
- Yield and fruit qualitye2
- Direction
- unaffectede2
- Comparator
- manually operated treatmente3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Poblano peppers (Capsicum annuum L.) were grown under four automated, tensiometer-controlled irrigation regimes”
e2“Yield and fruit quality were unaffected by irrigation treatment”
e3“a manually operated treatment”
Claim · model-written summary
Soil water potential was poorly correlated with leaf water potential and relative water content of poblano pepper.
- Taxon
- Capsicum annuumCapsicum annuume1
- Outcome
- leaf water potential and relative water contente4
- Comparator
- Soil water potentiale4
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Poblano peppers (Capsicum annuum L.) were grown under four automated, tensiometer-controlled irrigation regimes”
e4“Soil water potential was poorly correlated with plant leaf water potential and relative water content”
Claim · model-written summary
Leaf water potential and relative water content of poblano pepper were well correlated with air temperature, relative humidity and dew point temperature.
- Taxon
- Capsicum annuumCapsicum annuume1
- Outcome
- leaf water potential and relative water contente5
- Comparator
- air temperature, relative humidity, dew point temperaturee5
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Poblano peppers (Capsicum annuum L.) were grown under four automated, tensiometer-controlled irrigation regimes”
e5“Plant leaf water potential and relative water content were well correlated with the following environmental factors: air temperature, relative humidity, dew point temperature, and solar radiation”
Claim · model-written summary
Leaf water potential and relative water content of poblano pepper were well correlated with solar radiation.
- Taxon
- Capsicum annuumCapsicum annuume1
- Outcome
- leaf water potential and relative water contente5
- Comparator
- solar radiatione5
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Poblano peppers (Capsicum annuum L.) were grown under four automated, tensiometer-controlled irrigation regimes”
e5“Plant leaf water potential and relative water content were well correlated with the following environmental factors: air temperature, relative humidity, dew point temperature, and solar radiation”
Claim · model-written summary
In a non-drought-stressed system, leaf water potential and relative water content may be poor indicators of soil water status because environmental variables affect them more than soil moisture.
- Taxon
- Capsicum annuumCapsicum annuume1
- Outcome
- poor indicators of soil water statuse6
- Qualifier
- because they may be affected by environmental variables to a greater extent than by soil moisturee6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Poblano peppers (Capsicum annuum L.) were grown under four automated, tensiometer-controlled irrigation regimes”
e6“These data indicate that in a non-drought-stressed production system leaf water potential and relative water content may be poor indicators of soil water status because they may be affected by environmental variables to a greater extent than by soil moisture”
The same questions in other papers
irrigation · quality: grain · Capsicum annuum (sweet pepper)Results agree
2 papers in the same direction as this paper
- no effect
- negative
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.