Abstract
The study was conducted to determine the influence of preceding crop, mineral fertilizers, and weather conditions on the formation of spring wheat agrophytocenosis grown according to no-tillage technology. The object of the study was weed component of agrophytocenoses and its influence on spring wheat productivity in the northern forest-steppe zone of the Southern Urals in conditions of no-tillage. The experimental design comprised three crop rotation types and a monoculture with six spring wheat predecessors without fertilizers and with application of nitrogen fertilizers. Under no-tillage technology, the weed component in spring wheat crops in all the experimental types of treatment consisted of annual weeds. Their numbers in different types of crop rotation considerably depended on weather conditions; when the weather was wet, the average difference between the preceding crops reached 27 plants/m 2 , with variation coefficient of 47%. Spring wheat biomass significantly depended on fertilization levels—average differences over years reached 722 g/m 2 . The (pea + oats) precursor showed a higher biomass of annual weeds than other predecessors, average by 43–662 g/m 2 for both fertilization levels. Specific weight of weeds in the total biomass of the agrophytocenosis significantly depended on meteorological conditions, with differences amounting to 7%. In dry years, the influence of annual weed abundance and crop biomass on spring wheat productivity in a fertilized environment reached 80–82%.
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Claims 7
Claim · model-written summary
Under no-tillage the weed component in spring wheat crops in all treatments consisted of annual weeds.
- Taxon
- spring wheat
Triticum aestivume0 - Interactor
- annual weedse0weed
- Outcome
- weed componente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the weed component in spring wheat crops in all the experimental types of treatment consisted of annual weeds”
Claim · model-written summary
Annual weed numbers in different types of crop rotation depended considerably on weather conditions.
- Taxon
- Spring WheatTriticum aestivumt0
- Treatment
- weather conditionse1
- Interactor
- annual weedse0weed
- Outcome
- numberse1
- Qualifier
- different types of crop rotatione1
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Spring Wheat”
e0“the weed component in spring wheat crops in all the experimental types of treatment consisted of annual weeds”
e1“Their numbers in different types of crop rotation considerably depended on weather conditions”
Claim · model-written summary
When the weather was wet, the average difference in weed numbers between preceding crops reached 27 plants/m2, with a variation coefficient of 47%.
- Taxon
- Spring WheatTriticum aestivumt0
- Outcome
- average difference between the preceding cropse0
- Value
- 27 plants/m 2e0
- Qualifier
- variation coefficient of 47%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Spring Wheat”
e0“when the weather was wet, the average difference between the preceding crops reached 27 plants/m 2 , with variation coefficient of 47%”
Claim · model-written summary
Spring wheat biomass depended significantly on fertilization levels, with average differences over years reaching 722 g/m2.
- Taxon
- Spring wheatTriticum aestivume0
- Treatment
- fertilization levelse0
- Outcome
- Spring wheat biomasse0
- Value
- 722 g/m 2e0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Spring wheat biomass significantly depended on fertilization levels—average differences over years reached 722 g/m 2”
Claim · model-written summary
The (pea + oats) precursor gave a higher biomass of annual weeds than other predecessors, on average by 43-662 g/m2 across both fertilization levels.
- Taxon
- Spring WheatTriticum aestivumt0
- Treatment
- (pea + oats) precursore0
- Interactor
- annual weedse0weed
- Outcome
- biomass of annual weedse0
- Direction
- highere0
- Value
- 43–662 g/m 2e0
- Comparator
- other predecessorse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Spring Wheat”
e0“The (pea + oats) precursor showed a higher biomass of annual weeds than other predecessors, average by 43–662 g/m 2 for both fertilization levels”
Claim · model-written summary
The specific weight of weeds in the total agrophytocenosis biomass depended significantly on meteorological conditions, with differences of 7%.
- Taxon
- Spring WheatTriticum aestivumt0
- Treatment
- meteorological conditionse0
- Outcome
- Specific weight of weeds in the total biomasse0
- Value
- 7%e0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Spring Wheat”
e0“Specific weight of weeds in the total biomass of the agrophytocenosis significantly depended on meteorological conditions, with differences amounting to 7%”
Claim · model-written summary
In dry years, annual weed abundance and crop biomass accounted for 80-82% of the influence on spring wheat productivity in a fertilized environment.
- Taxon
- spring wheatTriticum aestivume0
- Treatment
- annual weed abundance and crop biomasse0
- Interactor
- annual weede0weed
- Outcome
- spring wheat productivitye0
- Value
- 80–82%e0
- Setting
- dry yearse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In dry years, the influence of annual weed abundance and crop biomass on spring wheat productivity in a fertilized environment reached 80–82%”
The same questions in other papers
Avena sativa · weed · Triticum aestivum (wheat)Positive and negative results
2 in the opposite direction
- positive
- positive
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.