Abstract
Using 12 cultivars of barley, density response was investigated at five levels of spacing, i. e. 2x2cm2, 4x4cm2, 8x8cm2, 16x16cm2 and 32x32cm2 per plant. The characters examined were culm number, ear number, seed yield and plant weight. Decrease in plant density caused proportional increase in vegetative growth, that is culm number and ear number, but seed yield tended to reach a plateau when the spacing surpassed a certain spacing level though the critical density was different among genotypes. Density response in vegetative growth and that in reproductive capacity were not correlated. Competitive ability of the same 12 cultivars was tested by a common test-variety. Comparison between competitive ability and density response showed that they were not found to be highly correlated, suggesting that they are different rather than the same traits. Nine factors which are supposed to influence the growth of individual plants in a population are listed together with some considerations.
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Claims 4
Claim · model-written summary
Lower plant density proportionally increased barley culm number and ear number.
- Taxon
- barley
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Hordeum vulgaree0 - Treatment
- Decrease in plant densitye1
- Outcome
- culm number and ear numbere1
- Direction
- increasee1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“Using 12 cultivars of barley, density response was investigated at five levels of spacing”
e1“Decrease in plant density caused proportional increase in vegetative growth, that is culm number and ear number”
Claim · model-written summary
Barley seed yield tended to plateau beyond a spacing threshold that varied among genotypes.
- Taxon
- barleyHordeum vulgaree0
- Treatment
- spacinge1
- Outcome
- seed yielde1
- Direction
- plateaue1
- Qualifier
- critical density was different among genotypese1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Using 12 cultivars of barley”
e1“seed yield tended to reach a plateau when the spacing surpassed a certain spacing level though the critical density was different among genotypes”
Claim · model-written summary
Vegetative growth and reproductive capacity density responses were not correlated.
- Taxon
- barleyHordeum vulgaree0
- Outcome
- Density response in vegetative growthe1
- Direction
- not correlatede1
- Comparator
- reproductive capacitye1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Using 12 cultivars of barley”
e1“Density response in vegetative growth and that in reproductive capacity were not correlated.”
Claim · model-written summary
Competitive ability and density response across the barley cultivars were not highly correlated.
- Taxon
- barleyHordeum vulgaree0
- Outcome
- competitive abilitye1
- Direction
- not found to be highly correlatede1
- Comparator
- density responsee1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Using 12 cultivars of barley”
e1“Comparison between competitive ability and density response showed that they were not found to be highly correlated”