Abstract
Abstract Effects of 0.3, 0.5, and 0.7% chlormequat, 0.15 and 0.35% ethephon, and 0.12 and 0.22% paclobutrazol on lucerne growth and components of seed yield were investigated in Gansu province, China. The paclobutrazol application decreased above‐ and below‐ground biomass by 25–48 and 44% at concentrations of 0.12–0.22%, and increased seed yield by 31–47%. Applications of ethephon and chlormequat did not affect lucerne biomass, but reduced seed yield in the first year. Plant growth regulators also affected yield components very differently, with paclobutrazol having the greatest effect. The 0.22% paclobutrazol application increased the number of racemes per shoot by 38%, the number of pods per raceme by 392% and the number of seeds per pod by 115%. Although ethephon and chlormequat reduced seed yield in the first year and gave no response in the second, these plant growth regulators had some positive affects on some seed yield components. The 0.15% ethephon application increased the number of racemes per shoot by 35% and the number of pods per raceme by 225%. The 0.3% chlormequat application increased the number of fertile shoots per unit area by 24% and number of pods per raceme by 178%. None of the plant growth regulators had ill effects on lucerne seed quality (1000‐seed weight and seed germination). Among yield components, the number of pods per raceme and number of seeds per pod were the most important factors to determine lucerne seed yield and yield potential can be estimated with the use of the two factors as a selection criterion. Results from this study will be used to recommend further evaluation of paclobutrazol at multiple sites and to guide lucerne seed production in the north‐west region of China.
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Claims 17
Claim · model-written summary
Paclobutrazol reduced above-ground biomass by 25–48%.
- Taxon
- lucerne
Medicago sativae1 - Treatment
- paclobutrazol applicatione0
- Outcome
- above‐e0
- Direction
- decreasede0
- Value
- 25–48e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The paclobutrazol application decreased above‐ and below‐ground biomass by 25–48 and 44% at concentrations of 0.12–0.22%”
e1“lucerne growth”
Claim · model-written summary
Paclobutrazol reduced below-ground biomass by 44%.
- Taxon
- lucerneMedicago sativae1
- Treatment
- paclobutrazol applicatione0
- Outcome
- below‐ground biomasse0
- Direction
- decreasede0
- Value
- 44%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The paclobutrazol application decreased above‐ and below‐ground biomass by 25–48 and 44% at concentrations of 0.12–0.22%”
e1“lucerne growth”
Claim · model-written summary
Paclobutrazol increased seed yield by 31–47%.
- Taxon
- lucerneMedicago sativae2
- Treatment
- paclobutrazol applicatione1
- Outcome
- seed yielde0
- Direction
- increasede0
- Value
- 31–47%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“increased seed yield by 31–47%”
e1“The paclobutrazol application”
e2“lucerne growth”
Claim · model-written summary
Ethephon did not affect lucerne biomass.
- Taxon
- lucerneMedicago sativae0
- Treatment
- ethephone0
- Outcome
- lucerne biomasse0
- Direction
- did not affecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Applications of ethephon and chlormequat did not affect lucerne biomass”
Claim · model-written summary
Chlormequat did not affect lucerne biomass.
- Taxon
- lucerneMedicago sativae0
- Treatment
- chlormequate0
- Outcome
- lucerne biomasse0
- Direction
- did not affecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Applications of ethephon and chlormequat did not affect lucerne biomass”
Claim · model-written summary
Ethephon reduced seed yield in the first year.
- Taxon
- lucerneMedicago sativae0
- Treatment
- ethephone0
- Outcome
- seed yielde0
- Direction
- reducede0
- Qualifier
- the first yeare0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Applications of ethephon and chlormequat did not affect lucerne biomass, but reduced seed yield in the first year”
Claim · model-written summary
Chlormequat reduced seed yield in the first year.
- Taxon
- lucerneMedicago sativae0
- Treatment
- chlormequate0
- Outcome
- seed yielde0
- Direction
- reducede0
- Qualifier
- the first yeare0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Applications of ethephon and chlormequat did not affect lucerne biomass, but reduced seed yield in the first year”
Claim · model-written summary
At 0.22%, paclobutrazol increased racemes per shoot by 38%.
- Taxon
- lucerneMedicago sativae1
- Treatment
- 0.22% paclobutrazol applicatione0
- Outcome
- number of racemes per shoote0
- Direction
- increasede0
- Value
- 38%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The 0.22% paclobutrazol application increased the number of racemes per shoot by 38%”
e1“lucerne growth”
Claim · model-written summary
At 0.22%, paclobutrazol increased pods per raceme by 392%.
- Taxon
- lucerneMedicago sativae1
- Treatment
- 0.22% paclobutrazol applicatione0
- Outcome
- number of pods per racemee0
- Direction
- increasede0
- Value
- 392%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The 0.22% paclobutrazol application increased the number of racemes per shoot by 38%, the number of pods per raceme by 392%”
e1“lucerne growth”
Claim · model-written summary
At 0.22%, paclobutrazol increased seeds per pod by 115%.
- Taxon
- lucerneMedicago sativae1
- Treatment
- 0.22% paclobutrazol applicatione0
- Outcome
- number of seeds per pode0
- Direction
- increasede0
- Value
- 115%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The 0.22% paclobutrazol application increased the number of racemes per shoot by 38%, the number of pods per raceme by 392% and the number of seeds per pod by 115%”
e1“lucerne growth”
Claim · model-written summary
At 0.15%, ethephon increased racemes per shoot by 35%.
- Taxon
- lucerneMedicago sativae1
- Treatment
- 0.15% ethephon applicatione0
- Outcome
- number of racemes per shoote0
- Direction
- increasede0
- Value
- 35%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The 0.15% ethephon application increased the number of racemes per shoot by 35%”
e1“lucerne growth”
Claim · model-written summary
At 0.15%, ethephon increased pods per raceme by 225%.
- Taxon
- lucerneMedicago sativae1
- Treatment
- 0.15% ethephon applicatione0
- Outcome
- number of pods per racemee0
- Direction
- increasede0
- Value
- 225%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The 0.15% ethephon application increased the number of racemes per shoot by 35% and the number of pods per raceme by 225%”
e1“lucerne growth”
Claim · model-written summary
At 0.3%, chlormequat increased fertile shoots per unit area by 24%.
- Taxon
- lucerneMedicago sativae1
- Treatment
- 0.3% chlormequat applicatione0
- Outcome
- number of fertile shoots per unit areae0
- Direction
- increasede0
- Value
- 24%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The 0.3% chlormequat application increased the number of fertile shoots per unit area by 24%”
e1“lucerne growth”
Claim · model-written summary
At 0.3%, chlormequat increased pods per raceme by 178%.
- Taxon
- lucerneMedicago sativae1
- Treatment
- 0.3% chlormequat applicatione0
- Outcome
- number of pods per racemee0
- Direction
- increasede0
- Value
- 178%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The 0.3% chlormequat application increased the number of fertile shoots per unit area by 24% and number of pods per raceme by 178%”
e1“lucerne growth”
Claim · model-written summary
The growth regulators had no ill effects on 1000-seed weight or seed germination.
- Taxon
- lucerneMedicago sativae0
- Treatment
- plant growth regulatorse0
- Outcome
- 1000‐seed weight and seed germinatione0
- Direction
- Nonee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“None of the plant growth regulators had ill effects on lucerne seed quality (1000‐seed weight and seed germination)”
Claim · model-written summary
Pods per raceme and seeds per pod were the most important predictors of seed yield.
- Taxon
- lucerneMedicago sativae0
- Organ / stage
- podse0
- Outcome
- lucerne seed yielde0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the number of pods per raceme and number of seeds per pod were the most important factors to determine lucerne seed yield”
Claim · model-written summary
The authors recommend further multi-site evaluation of paclobutrazol.
- Taxon
- lucerneMedicago sativae1
- Outcome
- further evaluation of paclobutrazol at multiple sitese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“recommend further evaluation of paclobutrazol at multiple sites”
e1“lucerne seed production”
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See all 11 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.