Abstract
A thorough knowledge of tiller development is essential in the analysis of grain production in most cultivated cereals, since the final number of ears produced by these plants is dependent on tillering. The object of this study was to investigate, under field conditions, the pattern of tillering, ear production, and survival of the component tillers in six barley cultivars: four six‐rowed ( Hordeum vulgare L.) and two two‐rowed ( H. distichon L.). The cultivars were grown in Granada, Spain, during 1980 and 1981 on a fine‐loamy, carbonatic, thermic, Calcixerollic Xerocrept soil, and each was subjected to two levels of N fertilizer(25 and 40 kg ha ‐1 ), both at seeding and as a top‐dressing. From the data collected on tiller development during this study, the existence of a critical survival height for tillers is postulated: tillers less than one‐third the height of the main stem at the end of shooting would fail to produce ears. The end of shooting corresponds to stages 8 and 9 of Feekes' scale when the last leaf or the ligule of the last leaf, respectively, is just visible. Nitrogen treatments at seeding, when added at maximum dosage, increased significantly both the number of tillers at the end of shooting (maximum increase = 21%) and the final number of tillers with ears (maximum increase = 31%), while the N treatments at topdressing (midway during shooting) did not affect the number of tillers at the end of shooting or at harvest.
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Claims 4
Claim · model-written summary
Tillers below one-third of main stem height at the end of shooting were postulated to fail to produce ears.
- Taxon
- barley
.jpg?width=60)
Hordeum vulgaree1 - Organ / stage
- tillerse0
- Outcome
- fail to produce earse0
- Qualifier
- less than one‐third the height of the main stem at the end of shootinge0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“tillers less than one‐third the height of the main stem at the end of shooting would fail to produce ears”
e1“six barley cultivars”
Claim · model-written summary
Maximum nitrogen dosage at seeding significantly raised tiller number at the end of shooting by up to 21%.
- Taxon
- barleyHordeum vulgaree1
- Treatment
- Nitrogen treatments at seedinge0
- Outcome
- number of tillers at the end of shootinge0
- Direction
- increasede0
- Value
- 21%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nitrogen treatments at seeding, when added at maximum dosage, increased significantly both the number of tillers at the end of shooting (maximum increase = 21%)”
e1“six barley cultivars”
Claim · model-written summary
Maximum nitrogen dosage at seeding significantly raised final tillers with ears by up to 31%.
- Taxon
- barleyHordeum vulgaree1
- Treatment
- Nitrogen treatments at seedinge0
- Outcome
- final number of tillers with earse0
- Direction
- increasede0
- Value
- 31%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nitrogen treatments at seeding, when added at maximum dosage, increased significantly both the number of tillers at the end of shooting (maximum increase = 21%) and the final number of tillers with ears (maximum increase = 31%)”
e1“six barley cultivars”
Claim · model-written summary
Nitrogen topdressing did not affect tiller number at the end of shooting or harvest.
- Taxon
- barleyHordeum vulgaree1
- Treatment
- N treatments at topdressinge0
- Outcome
- number of tillers at the end of shooting or at harveste0
- Direction
- did not affecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“N treatments at topdressing (midway during shooting) did not affect the number of tillers at the end of shooting or at harvest”
e1“six barley cultivars”
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nitrogen · yield · Hordeum vulgare (barley)Positive and negative results
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See all 550 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.