Abstract
Abstract Soil extractable Al, F and Zn concentrations decreased whereas extractable Ca, Cu, K, Mg, Na and P concentrations increased when the soil pH was raised from 3 to 6. These trends led to a decrease in growth of tea seedlings as determined by measurements of relative dry weight gain (RDW), relative leaf number gain (RLN) and relative leaf area gain (RLA). Tea seedlings of both ‘large‐leafed’ and ‘small‐leafed’ varieties grown in soils at pH 3 and 3.5 were the tallest and healthiest, while those at pH 6 died after 3 months. The large‐leafed variety showed higher growth rates than the small‐leafed variety. The highest ( p < 0.05) amounts of Al and F, 4225 and 430 mg kg −1 respectively, were found in seedlings under pH 3.5 treatment. When Al and F concentrations in seedlings increased, elements such as Ca, Mg, Na and Zn gently decreased ( p < 0.05) whereas P increased. K and Cu were not affected. The results indicated that soil pH values higher than 4 reduced Al and F concentrations in tea plants. © 2001 Society of Chemical Industry
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 12
Claim · model-written summary
Raising soil pH from 3 to 6 decreased extractable Al, F and Zn.
Verbatim
e0“Soil extractable Al, F and Zn concentrations decreased whereas extractable Ca, Cu, K, Mg, Na and P concentrations increased when the soil pH was raised from 3 to 6”
t0“tea plants”
Claim · model-written summary
Raising soil pH from 3 to 6 increased extractable Ca, Cu, K, Mg, Na and P.
Verbatim
e0“extractable Ca, Cu, K, Mg, Na and P concentrations increased when the soil pH was raised from 3 to 6”
t0“tea plants”
Claim · model-written summary
The soil pH trends decreased tea seedling growth by dry weight, leaf number and leaf area gains.
- Taxon
- tea seedlingse0
- Outcome
- relative dry weight gain (RDW), relative leaf number gain (RLN) and relative leaf area gain (RLA)e0
- Direction
- decreasee0
- Qualifier
- These trendse0
Not reportedSetting
Verbatim
e0“These trends led to a decrease in growth of tea seedlings as determined by measurements of relative dry weight gain (RDW), relative leaf number gain (RLN) and relative leaf area gain (RLA)”
Claim · model-written summary
Both tea varieties were tallest and healthiest at soil pH 3 and 3.5.
- Taxon
- Tea seedlingse0
- Material
- ‘large‐leafed’ and ‘small‐leafed’ varietiese0
- Treatment
- soils at pH 3 and 3.5e0
- Outcome
- tallest and healthieste0
- Direction
- talleste0
Not reportedComparator
Verbatim
e0“Tea seedlings of both ‘large‐leafed’ and ‘small‐leafed’ varieties grown in soils at pH 3 and 3.5 were the tallest and healthiest”
Claim · model-written summary
Tea seedlings at pH 6 died after three months.
Not reportedDirection
Verbatim
e0“those at pH 6 died after 3 months”
e1“Tea seedlings of both ‘large‐leafed’ and ‘small‐leafed’ varieties”
Claim · model-written summary
The large-leafed tea variety grew faster than the small-leafed variety.
Verbatim
e0“The large‐leafed variety showed higher growth rates than the small‐leafed variety”
t0“tea plants”
Claim · model-written summary
Seedling Al amount was highest at pH 3.5, at 4225 mg kg −1.
Not reportedComparator
Verbatim
e0“The highest ( p < 0.05) amounts of Al and F, 4225 and 430 mg kg −1 respectively, were found in seedlings under pH 3.5 treatment”
t0“tea plants”
Claim · model-written summary
Seedling F amount was highest at pH 3.5, at 430 mg kg −1.
- Taxon
- tea plantst0
- Treatment
- pH 3.5 treatmente0
- Outcome
- amounts of Al and Fe0
- Direction
- higheste0
- Value
- 430 mg kg −1e0
Not reportedComparator
Verbatim
e0“The highest ( p < 0.05) amounts of Al and F, 4225 and 430 mg kg −1 respectively, were found in seedlings under pH 3.5 treatment”
t0“tea plants”
Claim · model-written summary
As seedling Al and F increased, Ca, Mg, Na and Zn decreased.
Verbatim
e0“When Al and F concentrations in seedlings increased, elements such as Ca, Mg, Na and Zn gently decreased ( p < 0.05)”
t0“tea plants”
Claim · model-written summary
As seedling Al and F increased, P increased.
Verbatim
e0“When Al and F concentrations in seedlings increased, elements such as Ca, Mg, Na and Zn gently decreased ( p < 0.05) whereas P increased”
t0“tea plants”
Claim · model-written summary
K and Cu were unaffected as seedling Al and F changed.
Verbatim
e0“K and Cu were not affected”
e1“When Al and F concentrations in seedlings increased”
t0“tea plants”
Claim · model-written summary
Soil pH above 4 reduced tea plant Al and F concentrations.
- Taxon
- tea plantse0
- Treatment
- soil pH values higher than 4e0
- Outcome
- Al and F concentrationse0
- Direction
- reducede0
Not reportedComparator
Verbatim
e0“soil pH values higher than 4 reduced Al and F concentrations in tea plants”