Abstract
Abstract Long days at high latitudes inhibit tillering of cereals and hence seeding rates of 500–700 seeds m −2 are commonly used for spring wheat, barley and oats in Finland. Costs could be reduced by using a lower seeding rate in combination with crop management to produce more head‐bearing tillers m −2 . This study was designed to assess possibilities of breaking the uniculm growth habit of spring cereals by (1) lowering the seeding rate from 600 to 300 seeds m −2 and (2) manipulating tiller growth with early mechanical treatments to the crop (rolling, cutting) or chemical applications (foliar urea, CCC and GA). A low seeding rate and early application of foliar CCC at high latitudes, under good moisture conditions prior to heading, promoted 20% more head‐bearing tillers and 6% higher grain yield than standard management practices. However, cultivars differed in their response to CCC. The advantageous effects of CCC at a low seeding rate were attributed to increase, over the controls, in contribution of head‐bearing tillers to grain yield in wheat (cultivar Heta ), but more grains per head in oats (cultivar Veli ). Varietal recommendations for use of low seeding rate in combination with early CCC spraying should be examined further.
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Claims 6
Claim · model-written summary
Low seeding rate with early CCC application produced 20% more head-bearing tillers than standard management.
- Treatment
- A low seeding rate and early application of foliar CCCe0
- Outcome
- head‐bearing tillerse0
- Direction
- moree0
- Value
- 20%e0
- Qualifier
- under good moisture conditions prior to headinge0
- Comparator
- standard management practicese0
Not reportedTaxon
Verbatim
e0“A low seeding rate and early application of foliar CCC at high latitudes, under good moisture conditions prior to heading, promoted 20% more head‐bearing tillers and 6% higher grain yield than standard management practices.”
Claim · model-written summary
Low seeding rate with early CCC application produced 6% higher grain yield than standard management.
- Treatment
- A low seeding rate and early application of foliar CCCe0
- Outcome
- grain yielde0
- Direction
- highere0
- Value
- 6%e0
- Comparator
- standard management practicese0
Not reportedTaxon
Verbatim
e0“A low seeding rate and early application of foliar CCC at high latitudes, under good moisture conditions prior to heading, promoted 20% more head‐bearing tillers and 6% higher grain yield than standard management practices.”
Claim · model-written summary
Cultivars differed in response to CCC.
Not reportedTaxon
Verbatim
e0“However, cultivars differed in their response to CCC.”
Claim · model-written summary
In wheat cultivar Heta, head-bearing tillers contributed more to grain yield under low seeding rate and CCC.
- Taxon
- wheat
Triticum aestivume0 - Material
- Hetae0
- Treatment
- CCC at a low seeding ratee0
- Outcome
- contribution of head‐bearing tillers to grain yielde0
- Direction
- increasee0
- Comparator
- controlse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The advantageous effects of CCC at a low seeding rate were attributed to increase, over the controls, in contribution of head‐bearing tillers to grain yield in wheat (cultivar Heta )”
Claim · model-written summary
In oats cultivar Veli, CCC with low seeding rate increased grains per head over controls.
- Taxon
- oats
Avena sativae0 - Material
- Velie0
- Outcome
- grains per heade0
- Direction
- moree0
Not reportedTreatmentComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“but more grains per head in oats (cultivar Veli ).”
Claim · model-written summary
The authors recommend further examination of varietal recommendations for low seeding rate with early CCC spraying.
- Outcome
- Varietal recommendations for use of low seeding rate in combination with early CCC sprayinge0
Not reportedTaxon
Verbatim
e0“Varietal recommendations for use of low seeding rate in combination with early CCC spraying should be examined further.”
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