Abstract
Low soil pH and calcium (Ca) deficiency in both the root and pod-zone are important problems for groundnut production world-over on account of the light-textured nature of the soils suitable for its production. An experiment was conducted to examine the interaction of pH and calcium (Ca) supply in the pod-zone on reproductive growth of groundnut. Attached gynophores were cultured singly in solutions at three pH levels (3.5, 5.0, and 6.5) in factorial combination with three solution Ca concentration levels (500, 1000, and 2000 μM). Generally, low pH had an adverse effect on the reproductive growth of groundnut. Approximately 58% of the gynophores cultured in treatment combinations with pH 3.5 produced normal pods, compared to 94% in combinations with pH 5.0 and 6.5. In addition, both pod mass and seed mass were severely depressed in treatment combinations with pH 3.5 compared to combinations with pH 5.0 and pH 6.5. Increasing Ca from 500 to 2000 μM Ca at low pH had limited ameliorative effect on pod-set, pod mass and seed mass, whereas positive responses were higher at the intermediate pH of 5.0. A combination of high Ca and pH appeared to be detrimental to pod and seed growth.
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Claims 6
Claim · model-written summary
At pH 3.5, 58% of gynophores made normal pods versus 94% at higher pH.
- Taxon
- groundnut
Arachis hypogaeat0 - Organ / stage
- gynophorese0
- Treatment
- pH 3.5e0
- Outcome
- produced normal podse0
- Value
- 58%e0
- Qualifier
- 94%e0
- Comparator
- pH 5.0 and 6.5e0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Approximately 58% of the gynophores cultured in treatment combinations with pH 3.5 produced normal pods, compared to 94% in combinations with pH 5.0 and 6.5”
t0“GROUNDNUT”
Claim · model-written summary
Low pH depressed pod mass.
- Taxon
- groundnutArachis hypogaeat0
- Treatment
- pH 3.5e0
- Outcome
- pod masse0
- Direction
- depressede0
- Comparator
- pH 5.0 and pH 6.5e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“both pod mass and seed mass were severely depressed in treatment combinations with pH 3.5 compared to combinations with pH 5.0 and pH 6.5”
t0“GROUNDNUT”
Claim · model-written summary
Low pH depressed seed mass.
- Taxon
- groundnutArachis hypogaeat0
- Treatment
- pH 3.5e0
- Outcome
- seed masse0
- Direction
- depressede0
- Comparator
- pH 5.0 and pH 6.5e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“both pod mass and seed mass were severely depressed in treatment combinations with pH 3.5 compared to combinations with pH 5.0 and pH 6.5”
t0“GROUNDNUT”
Claim · model-written summary
Increasing calcium at low pH had limited ameliorative effect on pod set and mass.
- Taxon
- groundnutArachis hypogaeat0
- Treatment
- Increasing Ca from 500 to 2000 μM Ca at low pHe0
- Outcome
- pod-set, pod mass and seed masse0
- Direction
- ameliorativee0
- Qualifier
- limitede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Increasing Ca from 500 to 2000 μM Ca at low pH had limited ameliorative effect on pod-set, pod mass and seed mass”
t0“GROUNDNUT”
Claim · model-written summary
Calcium responses were higher at pH 5.0.
- Taxon
- groundnutArachis hypogaeat0
- Treatment
- pH of 5.0e0
- Outcome
- positive responsese0
- Direction
- highere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“positive responses were higher at the intermediate pH of 5.0”
t0“GROUNDNUT”
Claim · model-written summary
High calcium with high pH appeared detrimental to pod and seed growth.
- Taxon
- groundnutArachis hypogaeat0
- Treatment
- high Ca and pHe0
- Outcome
- pod and seed growthe0
- Direction
- detrimentale0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A combination of high Ca and pH appeared to be detrimental to pod and seed growth”
t0“GROUNDNUT”
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