Abstract
Knowledge of K requirement for cotton growth and development is need since it play a pivotal role on its efficient production and fiber quality.Our present study focused on the effects of potassium nutrition on cotton growth and leaf physiological characteristics at seedling stage.Two cotton varieties,Lu18(L18) and zhong41(ZH41),were used and four rates of K fertilizer were applied (K_2O 0,60,180 and 300 kg/ha) under field condition with randomized block (design).The results showed,K application increased plant height and leaf numbers per plant,but its effects on leaf area were not consistent.It appeared to reach maximum area when K application rate was 180 kg/ha,and then declined with further increasing potassium fertilizer.K application could promote the synthesize of chlorophyll.K application increased the chlorophyll fluorescence dynamics parameters,Fv/Fo,Fv/Fm and qP,and reduced qN.K application also increased actual quantum efficiency(ФPSⅡ) and photosynthetic electron transport rate(ETR), which improved the photosynthesis of cotton leaf consequently.In addition,the effects of K application on endogenous hormones were divergent.It increased the content of IAA,ZR,and GA_3,while the content of ABA were reduced as the result;The lower ratio of IAA/ABA,ZR/ABA,GA_3/ABA ratio indicated that senescence of leaf could be retarded.Rational application of K could promote N metabolism through increasing the activity of NR.
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Claims 12
Claim · model-written summary
Potassium application increased cotton plant height and leaf number.
- Taxon
- cotton
Gossypium hirsutumt0 - Treatment
- K applicatione0
- Outcome
- plant height and leaf numbers per plante0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“K application increased plant height and leaf numbers per plant”
t0“cotton”
Claim · model-written summary
The cotton leaf-area response to potassium was inconsistent.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- potassium nutritiont0
- Outcome
- leaf areae0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“its effects on leaf area were not consistent”
t0“potassium nutrition on growth and leaf physiological characteristics at seedling stage of cotton”
Claim · model-written summary
Cotton leaf area reached a maximum at 180 kg/ha potassium application and then declined at higher rates.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- K application rate was 180 kg/hae0
- Outcome
- maximum areae0
- Direction
- maximume0
- Comparator
- further increasing potassium fertilizere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“It appeared to reach maximum area when K application rate was 180 kg/ha,and then declined with further increasing potassium fertilizer”
t0“cotton”
Claim · model-written summary
Potassium application promoted chlorophyll synthesis.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- K applicatione0
- Outcome
- synthesize of chlorophylle0
- Direction
- promotee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“K application could promote the synthesize of chlorophyll”
t0“cotton”
Claim · model-written summary
Potassium increased Fv/Fo, Fv/Fm and qP fluorescence parameters.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- K applicatione0
- Outcome
- Fv/Fo,Fv/Fm and qPe0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“K application increased the chlorophyll fluorescence dynamics parameters,Fv/Fo,Fv/Fm and qP”
t0“cotton”
Claim · model-written summary
Potassium reduced qN.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- potassium nutritiont0
- Outcome
- qNe0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“and reduced qN”
t0“potassium nutrition on growth and leaf physiological characteristics at seedling stage of cotton”
Claim · model-written summary
Potassium increased actual quantum efficiency and photosynthetic electron transport rate.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- K applicatione0
- Outcome
- actual quantum efficiency(ФPSⅡ) and photosynthetic electron transport rate(ETR)e0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“K application also increased actual quantum efficiency(ФPSⅡ) and photosynthetic electron transport rate(ETR)”
t0“cotton”
Claim · model-written summary
The authors infer that potassium improved cotton-leaf photosynthesis.
- Taxon
- cottonGossypium hirsutume0
- Treatment
- potassium nutritiont0
- Outcome
- photosynthesis of cotton leafe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“which improved the photosynthesis of cotton leaf consequently”
t0“potassium nutrition”
Claim · model-written summary
Potassium raised IAA, ZR and GA_3 content.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- potassium nutritiont0
- Outcome
- content of IAA,ZR,and GA_3e0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“It increased the content of IAA,ZR,and GA_3”
t0“potassium nutrition on growth and leaf physiological characteristics at seedling stage of cotton”
Claim · model-written summary
Potassium reduced ABA content.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- potassium nutritiont0
- Outcome
- content of ABAe0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“while the content of ABA were reduced as the result”
t0“potassium nutrition on growth and leaf physiological characteristics at seedling stage of cotton”
Claim · model-written summary
The authors interpreted hormone ratios as indicating delayed leaf senescence.
- Taxon
- cottonGossypium hirsutumt0
- Compound
- IAA/ABA,ZR/ABA,GA_3/ABAe0
- Outcome
- senescence of leaf could be retardede0
- Direction
- retardede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The lower ratio of IAA/ABA,ZR/ABA,GA_3/ABA ratio indicated that senescence of leaf could be retarded”
t0“cotton”
Claim · model-written summary
Potassium increased NR activity, which the authors associate with nitrogen metabolism.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- Rational application of Ke0
- Gene
- NRe0
- Outcome
- N metabolisme0
- Direction
- promotee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Rational application of K could promote N metabolism through increasing the activity of NR”
t0“cotton”
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See all 39 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.