Abstract
Abstract No‐tillage systems help reduce soil erosion, yet crop growth is often adversely affected by the presence of surface residue. The specific effects of no‐tillage systems on phenological events of spring wheat ( Triticum aestivum L.) have been poorly characterized. A field study was conducted on a Palouse silt loam (fine‐silty, mixed, mesic Pachic Ultic Haploxeroll) during 1983 and 1984 to examine the growth and development of four spring wheat cultivars grown under conventional (fall plow and spring disk) and no‐tillage (direct drilling) tillage systems. Throughout the two growing seasons, leaf and tiller production, tiller abortion, and soil moisture were monitored while leaf area, leaf weight, and stem weight were determined at weekly intervals in 1983. The length of the second leaf on the main stem, rate of leaf production, and rate of tiller production were reduced in plants grown in no‐tillage compared with conventional tillage. Except for the cultivar ‘Waverly’, tiller production was reduced by no‐tillage but tiller abortion was not. More soil water was available throughout the season in the no‐tillage plots, yet the plants grown in no‐tillage tended to be smaller than conventionally grown plants. Total nonstructural carbohydrates in the lower stem‐crown area at 12 days after anthesis were not affected by tillage treatment, and all cultivars had used most of this stored carbohydrate by physiological maturity. Overall, these results indicated that stresses that occur early in seedling development under no‐tillage reduced early growth and the plants were unable to overcome these effects prior to maturity. However, cultivars differed in tolerance to these early stresses. Thus, it should be possible to develop spring wheat cultivars for growth under no‐tillage.
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Claims 9
Claim · model-written summary
No-tillage reduced second-leaf length, leaf production rate and tiller production rate compared with conventional tillage.
- Taxon
- spring wheat
Triticum aestivumt0 - Treatment
- no‐tillagee0
- Outcome
- length of the second leaf on the main stem, rate of leaf production, and rate of tiller productione0
- Direction
- reducede0
- Comparator
- conventional tillagee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The length of the second leaf on the main stem, rate of leaf production, and rate of tiller production were reduced in plants grown in no‐tillage compared with conventional tillage”
t0“Spring Wheat”
Claim · model-written summary
Except in Waverly, no-tillage reduced tiller production.
- Taxon
- spring wheatTriticum aestivumt0
- Material
- ‘Waverly’e0
- Treatment
- no‐tillagee0
- Outcome
- tiller productione0
- Direction
- reducede0
- Qualifier
- Except for the cultivar ‘Waverly’e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Except for the cultivar ‘Waverly’, tiller production was reduced by no‐tillage but tiller abortion was not”
t0“Spring Wheat”
Claim · model-written summary
No-tillage did not affect tiller abortion.
- Taxon
- spring wheatTriticum aestivumt0
- Treatment
- no‐tillagee0
- Outcome
- tiller abortione0
- Direction
- was note0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“tiller production was reduced by no‐tillage but tiller abortion was not”
t0“Spring Wheat”
Claim · model-written summary
No-tillage plots had more soil water available throughout the season.
- Taxon
- spring wheatTriticum aestivumt0
- Treatment
- no‐tillagee0
- Outcome
- soil watere0
- Direction
- Moree0
- Qualifier
- throughout the seasone0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“More soil water was available throughout the season in the no‐tillage plots”
t0“Spring Wheat”
Claim · model-written summary
Plants under no-tillage tended to be smaller than conventionally grown plants.
- Taxon
- spring wheatTriticum aestivumt0
- Treatment
- no‐tillagee0
- Outcome
- smallere0
- Direction
- smallere0
- Comparator
- conventionally grown plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the plants grown in no‐tillage tended to be smaller than conventionally grown plants”
t0“Spring Wheat”
Claim · model-written summary
Tillage did not affect total nonstructural carbohydrates in the lower stem-crown area at 12 days after anthesis.
- Taxon
- spring wheatTriticum aestivumt0
- Organ / stage
- lower stem‐crown areae0
- Treatment
- tillage treatmente0
- Outcome
- Total nonstructural carbohydratese0
- Direction
- not affectede0
- Qualifier
- at 12 days after anthesise0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Total nonstructural carbohydrates in the lower stem‐crown area at 12 days after anthesis were not affected by tillage treatment”
t0“Spring Wheat”
Claim · model-written summary
All cultivars used most stored carbohydrate by physiological maturity.
- Taxon
- spring wheatTriticum aestivumt0
- Outcome
- stored carbohydratee0
- Direction
- used moste0
- Qualifier
- by physiological maturitye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“all cultivars had used most of this stored carbohydrate by physiological maturity”
t0“Spring Wheat”
Claim · model-written summary
Cultivars differed in tolerance to early stresses under no-tillage.
- Taxon
- spring wheatTriticum aestivumt0
- Outcome
- tolerance to these early stressese0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“cultivars differed in tolerance to these early stresses”
t0“Spring Wheat”
Claim · model-written summary
The authors conclude that spring wheat cultivars can be developed for no-tillage.
- Taxon
- spring wheatTriticum aestivume0
- Outcome
- develop spring wheat cultivars for growth under no‐tillagee0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“it should be possible to develop spring wheat cultivars for growth under no‐tillage”
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See all 1,414 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.