Abstract
The effects of varying P and K supplies on the growth and morphology of white clover were investigated in a pot experiment. Plants were treated with three rates of potassium (K) and four rates of phosphorus (P) in factorial combination, and five harvests were taken between August 1993 and February 1994. During establishment, shoot and leaf development were more adversely affected by P than by K deficiency but, by the final growth period, K deficiency was the more limiting to growth, causing dramatic reductions in leaf area index (LAI), numbers of growing points, and stolon and root masses. The adverse affects of K deficiency on shoot development were attributed to the curtailment of petiole and lamina expansion which have major requirements for K. It was noted that, under K deficiency, proportionately less assimilate was partitioned to leaf production than to stolon and root growth ; this may be an adaptation enabling K-deficient plants to exploit nutrient supplies in adjacent localities. The results suggest that, provided white clover can withstand ' moderate ' P stress during establishment, its persistence in swards will probably be limited more by K deficiency than by low or inadequate P supplies. However, because the experiment was conducted outside the normal growing season and with only a single white clover cultivar, it is inappropriate to make any generalizations regarding the effects of P and K nutrition on white clover in the field.
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Claims 5
Claim · model-written summary
Under K deficiency, by the final growth period, leaf area index, numbers of growing points, and stolon and root masses were dramatically reduced.
- Taxon
- white clover
Trifolium repense0 - Organ / stage
- final growth periode1
- Treatment
- K deficiencye1
- Outcome
- leaf area index (LAI), numbers of growing points, and stolon and root massese1
- Direction
- reductionse1
- Setting
- pot experimente0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The effects of varying P and K supplies on the growth and morphology of white clover were investigated in a pot experiment”
e1“by the final growth period, K deficiency was the more limiting to growth, causing dramatic reductions in leaf area index (LAI), numbers of growing points, and stolon and root masses”
Claim · model-written summary
During establishment, shoot and leaf development were more adversely affected by P than by K deficiency.
- Taxon
- white cloverTrifolium repense0
- Organ / stage
- establishmente2
- Treatment
- Pe2
- Outcome
- shoot and leaf developmente2
- Direction
- more adversely affectede2
- Comparator
- K deficiencye2
- Setting
- pot experimente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The effects of varying P and K supplies on the growth and morphology of white clover were investigated in a pot experiment”
e2“During establishment, shoot and leaf development were more adversely affected by P than by K deficiency”
Claim · model-written summary
Under K deficiency, proportionately less assimilate was partitioned to leaf production than to stolon and root growth.
- Taxon
- white cloverTrifolium repense0
- Treatment
- K deficiencye3
- Outcome
- partitioned to leaf productione3
- Direction
- lesse3
- Comparator
- stolon and root growthe3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The effects of varying P and K supplies on the growth and morphology of white clover were investigated in a pot experiment”
e3“It was noted that, under K deficiency, proportionately less assimilate was partitioned to leaf production than to stolon and root growth”
Claim · model-written summary
The adverse effects of K deficiency on shoot development were attributed to curtailed petiole and lamina expansion, which need large amounts of K.
- Taxon
- white cloverTrifolium repense0
- Treatment
- K deficiencye4
- Outcome
- shoot developmente4
- Qualifier
- curtailment of petiole and lamina expansione4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The effects of varying P and K supplies on the growth and morphology of white clover were investigated in a pot experiment”
e4“The adverse affects of K deficiency on shoot development were attributed to the curtailment of petiole and lamina expansion which have major requirements for K”
Claim · model-written summary
White clover persistence in swards is probably limited more by K deficiency than by low or inadequate P supply, provided the plant withstands moderate P stress during establishment.
- Taxon
- white cloverTrifolium repense5
- Treatment
- K deficiencye5
- Outcome
- persistence in swardse5
- Direction
- limited moree5
- Comparator
- low or inadequate P suppliese5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e5“The results suggest that, provided white clover can withstand ' moderate ' P stress during establishment, its persistence in swards will probably be limited more by K deficiency than by low or inadequate P supplies”
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See all 25 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.