Abstract
The response of cowpea to supplemental irrigation at various growth stages was compared with a rainfed and a full irrigation (no stress) treatments during rainy season of 1992 and 1993 at Coimbatore. Withholding irrigation at flowering and pod filling stages of crop enhanced the process of maturity. Among the yield components pod density was most sensitive to irrigation. Crop without water stress in any part of the plant growth recorded four times higher yield (8.69 q/ha) than rainfed treatment (2.19 q/ha). Supplemental irrigation during flowering and vegetative stages alone increased the seed yield by 94% (4.24 q/ha) and 75% (3.84 q/ha), respectively, over the rainfed crop. Two irrigations given either at flowering and pod filing stages or vegetative and flowering stage increased seed yield by 172% and 160% in comparison to rainfed treatmentrespectively. Irrigations at vegetative, flowering and pod filling stages produced comparable yields as that of full irrigation treatment. Supplemental irrigation only at flowering stage recorded maximum water use efficiency (155 kg DMP/ha/mm).
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Claims 9
Claim · model-written summary
Withholding water at flowering and pod filling accelerated maturity.
- Taxon
- cowpea
Vigna unguiculatat0 - Treatment
- Withholding irrigation at flowering and pod filling stagese0
- Outcome
- process of maturitye0
- Direction
- enhancede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Withholding irrigation at flowering and pod filling stages of crop enhanced the process of maturity”
t0“cowpea”
Claim · model-written summary
Pod density was the yield component most sensitive to irrigation.
- Taxon
- cowpeaVigna unguiculatat0
- Outcome
- pod density was most sensitive to irrigatione0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Among the yield components pod density was most sensitive to irrigation”
t0“cowpea”
Claim · model-written summary
Full irrigation yielded four times as much as rainfed crop, 8.69 versus 2.19 q/ha.
- Taxon
- cowpeaVigna unguiculatat0
- Treatment
- without water stress in any part of the plant growthe0
- Outcome
- yielde0
- Direction
- highere0
- Value
- 8.69 q/hae0
- Qualifier
- 2.19 q/hae0
- Comparator
- rainfed treatmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Crop without water stress in any part of the plant growth recorded four times higher yield (8.69 q/ha) than rainfed treatment (2.19 q/ha)”
t0“cowpea”
Claim · model-written summary
Flowering-stage irrigation increased seed yield by 94% over rainfed crop.
- Taxon
- cowpeaVigna unguiculatat0
- Treatment
- Supplemental irrigation during floweringe0
- Outcome
- seed yielde0
- Direction
- increasede0
- Value
- 94%e0
- Qualifier
- 4.24 q/hae0
- Comparator
- rainfed crope0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Supplemental irrigation during flowering and vegetative stages alone increased the seed yield by 94% (4.24 q/ha) and 75% (3.84 q/ha), respectively, over the rainfed crop”
t0“cowpea”
Claim · model-written summary
Vegetative-stage irrigation increased seed yield by 75% over rainfed crop.
- Taxon
- cowpeaVigna unguiculatat0
- Treatment
- vegetative stages alonee0
- Outcome
- seed yielde0
- Direction
- increasede0
- Value
- 75%e0
- Qualifier
- 3.84 q/hae0
- Comparator
- rainfed crope0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Supplemental irrigation during flowering and vegetative stages alone increased the seed yield by 94% (4.24 q/ha) and 75% (3.84 q/ha), respectively, over the rainfed crop”
t0“cowpea”
Claim · model-written summary
Irrigation at flowering and pod filling increased seed yield 172% versus rainfed.
- Taxon
- cowpeaVigna unguiculatat0
- Treatment
- flowering and pod filing stagese0
- Outcome
- seed yielde0
- Direction
- increasede0
- Value
- 172%e0
- Comparator
- rainfed treatmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Two irrigations given either at flowering and pod filing stages or vegetative and flowering stage increased seed yield by 172% and 160% in comparison to rainfed treatmentrespectively”
t0“cowpea”
Claim · model-written summary
Irrigation at vegetative and flowering stages increased seed yield 160% versus rainfed.
- Taxon
- cowpeaVigna unguiculatat0
- Treatment
- vegetative and flowering stagee0
- Outcome
- seed yielde0
- Direction
- increasede0
- Value
- 160%e0
- Comparator
- rainfed treatmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Two irrigations given either at flowering and pod filing stages or vegetative and flowering stage increased seed yield by 172% and 160% in comparison to rainfed treatmentrespectively”
t0“cowpea”
Claim · model-written summary
Three-stage irrigation produced yields comparable to full irrigation.
- Taxon
- cowpeaVigna unguiculatat0
- Treatment
- Irrigations at vegetative, flowering and pod filling stagese0
- Outcome
- yieldse0
- Direction
- comparablee0
- Comparator
- full irrigation treatmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Irrigations at vegetative, flowering and pod filling stages produced comparable yields as that of full irrigation treatment”
t0“cowpea”
Claim · model-written summary
Flowering-only irrigation attained maximum water use efficiency of 155 kg DMP/ha/mm.
- Taxon
- cowpeaVigna unguiculatat0
- Treatment
- Supplemental irrigation only at flowering stagee0
- Outcome
- water use efficiencye0
- Direction
- maximume0
- Value
- 155 kg DMP/ha/mme0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Supplemental irrigation only at flowering stage recorded maximum water use efficiency (155 kg DMP/ha/mm)”
t0“cowpea”
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See all 61 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.