Abstract
Abstract We previously attributed the injury to bell peppers ( Capsicum frutescens ) by sprinkling them with saline water to flushing into the root zone of salts accumulated at the soil surface rather than to foliar salt absorption. These two possible mechanisms of salt injury have now been studied further by observing the effects of sprinkling frequency and the related degree of surface salt accumulation. Bell peppers in small field plots were sprinkled every 2.3, 3.5, and 4.75 days (average intervals for each treatment) with low‐salt (450 mg/liter) and medium and high‐salt waters (1,000 and 2,000 mg/liter of added NaCl + CaCl 2 , respectively). Three additional plots were drip irrigated daily with the three waters for comparative purposes. Soil salt distributions, foliar salt contents, and bell pepper yields were determined. Sprinkling with the low‐salt water and drip irrigation with all three waters caused no leaf damage. Plants sprinkled every 2.3 days with the two saline waters suffered more leaf burn and produced lower yields than plants sprinkled less often. Sprinkling with the medium‐salt water reduced yields appreciably only at the highest frequency (2.3 days) but sprinkling with the high‐salt water reduced yields more than 50% at all sprinkling frequencies, compared to a yield loss of only 14% by drip irrigation with this water. Since sprinkling with the medium‐salt water caused no observable osmotic shock by salt flushing, injury and yield loss appear to be related primarily to foliar salt absorption. Sprinkling with saline waters appears to induce sensitivity to sodium and chloride in bell pepper plants as it does in other species that do not appear sensitive to these ions when surface irrigated.
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Claims 8
Claim · model-written summary
Sprinkling bell peppers with low-salt water, and drip irrigation with all three waters, caused no leaf damage in small field plots.
- Taxon
- Bell pepperse0
- Treatment
- Sprinkling with the low‐salt water and drip irrigation with all three waterse1
- Outcome
- leaf damagee1
- Setting
- small field plotse0
Not reportedComparatorDirection
Verbatim
e0“Bell peppers in small field plots”
e1“Sprinkling with the low‐salt water and drip irrigation with all three waters caused no leaf damage”
Claim · model-written summary
Bell pepper plants sprinkled every 2.3 days with the two saline waters suffered more leaf burn than plants sprinkled less often.
Verbatim
e0“Bell peppers in small field plots”
e1“Plants sprinkled every 2.3 days with the two saline waters suffered more leaf burn and produced lower yields than plants sprinkled less often”
Claim · model-written summary
Bell pepper plants sprinkled every 2.3 days with the two saline waters produced lower yields than plants sprinkled less often.
Verbatim
e0“Bell peppers in small field plots”
e1“Plants sprinkled every 2.3 days with the two saline waters suffered more leaf burn and produced lower yields than plants sprinkled less often”
Claim · model-written summary
Sprinkling bell peppers with medium-salt water reduced yields appreciably only at the highest sprinkling frequency (every 2.3 days).
- Taxon
- Bell pepperse0
- Treatment
- Sprinkling with the medium‐salt watere1
- Outcome
- yieldse1
- Direction
- reducede1
- Qualifier
- only at the highest frequency (2.3 days)e1
- Setting
- small field plotse0
Not reportedComparator
Verbatim
e0“Bell peppers in small field plots”
e1“Sprinkling with the medium‐salt water reduced yields appreciably only at the highest frequency (2.3 days)”
Claim · model-written summary
Sprinkling bell peppers with high-salt water reduced yields by more than 50% at all sprinkling frequencies.
- Taxon
- Bell pepperse0
- Treatment
- sprinkling with the high‐salt watere1
- Outcome
- yieldse1
- Direction
- reducede1
- Value
- more than 50%e1
- Setting
- small field plotse0
Not reportedComparator
Verbatim
e0“Bell peppers in small field plots”
e1“sprinkling with the high‐salt water reduced yields more than 50% at all sprinkling frequencies”
Claim · model-written summary
Drip irrigation of bell peppers with the high-salt water caused a yield loss of only 14%.
- Taxon
- Bell pepperse0
- Treatment
- drip irrigation with this watere1
- Outcome
- yield losse1
- Direction
- losse1
- Value
- 14%e1
- Setting
- small field plotse0
Not reportedComparator
Verbatim
e0“Bell peppers in small field plots”
e1“a yield loss of only 14% by drip irrigation with this water”
Claim · model-written summary
The authors conclude that injury and yield loss in bell pepper from sprinkling with saline water appear related primarily to foliar salt absorption rather than osmotic shock from salt flushing.
Verbatim
e0“Bell peppers in small field plots”
e1“injury and yield loss appear to be related primarily to foliar salt absorption”
Claim · model-written summary
Sprinkling with saline waters appears to induce sensitivity to sodium and chloride in bell pepper plants.
- Taxon
- bell pepper plantse0
- Treatment
- Sprinkling with saline waterse0
- Outcome
- sensitivity to sodium and chloridee0
- Direction
- inducee0
Not reportedComparator
Verbatim
e0“Sprinkling with saline waters appears to induce sensitivity to sodium and chloride in bell pepper plants”
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