Abstract
This paper contains an analysis of taxonomic weed biodiversity in the cultivation of spring barley in the period of 1990-2004, grown in crop rotation after potato with a 25% share of this cereal (potato - spring barley - field pea - winter triticale) as well as in crop rotation with its 75% share (potato - spring barley - spring barley - spring barley) in which barley was grown once and twice after the same barley crop. No weed control was used in the present experiment. Every year in the spring (at full emergence of the cereal crop) and before harvest, the species composition and the numbers of individual weed species were determined, as well as weed biomass before harvest. On this basis, the taxonomic diversity and distinctness indices were calculated. Potato/barley crop rotation with a 25% share of this cereal and growing spring barley once and twice after the same barley crop did not differentiate taxonomic weed biodiversity. However, it was positively correlated with rainfall abundance during the growing season and negatively correlated with mean temperature. The taxonomic diversity indices were positively correlated with species richness and species diversity, whereas the taxonomic distinctness indices did not generally show any relationship with these measures. Spring barley grain yield did not depend on taxonomic biodiversity of weed communities.
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Claims 6
Claim · model-written summary
Crop rotations and repeated barley cultivation did not differentiate weed taxonomic biodiversity.
- Taxon
- spring barley
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Hordeum vulgaree1 - Treatment
- Potato/barley crop rotation with a 25% share of this cereale0
- Outcome
- taxonomic weed biodiversitye0
- Direction
- did not differentiatee0
- Comparator
- growing spring barley once and twice after the same barley crope0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“Potato/barley crop rotation with a 25% share of this cereal and growing spring barley once and twice after the same barley crop did not differentiate taxonomic weed biodiversity”
e1“cultivation of spring barley”
Claim · model-written summary
Weed taxonomic biodiversity correlated positively with growing-season rainfall.
- Taxon
- spring barleyHordeum vulgaree2
- Outcome
- taxonomic weed biodiversitye1
- Direction
- positively correlatede0
- Setting
- rainfall abundance during the growing seasone0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“it was positively correlated with rainfall abundance during the growing season”
e1“did not differentiate taxonomic weed biodiversity”
e2“cultivation of spring barley in the period of 1990-2004”
Claim · model-written summary
Weed taxonomic biodiversity correlated negatively with mean temperature.
- Taxon
- spring barleyHordeum vulgaree2
- Outcome
- taxonomic weed biodiversitye1
- Direction
- negatively correlatede0
- Setting
- mean temperaturee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“negatively correlated with mean temperature”
e1“did not differentiate taxonomic weed biodiversity”
e2“cultivation of spring barley in the period of 1990-2004”
Claim · model-written summary
Taxonomic diversity indices correlated positively with species richness and diversity.
- Taxon
- spring barleyHordeum vulgaree1
- Outcome
- taxonomic diversity indicese0
- Direction
- positively correlatede0
- Comparator
- species richness and species diversitye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The taxonomic diversity indices were positively correlated with species richness and species diversity”
e1“cultivation of spring barley in the period of 1990-2004”
Claim · model-written summary
Taxonomic distinctness indices generally showed no relationship with species richness or diversity.
- Taxon
- spring barleyHordeum vulgaree2
- Outcome
- taxonomic distinctness indicese0
- Direction
- did not generally show any relationshipe0
- Comparator
- species richness and species diversitye1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the taxonomic distinctness indices did not generally show any relationship with these measures”
e1“species richness and species diversity”
e2“cultivation of spring barley in the period of 1990-2004”
Claim · model-written summary
Spring barley grain yield did not depend on weed-community taxonomic biodiversity.
- Taxon
- Spring barleyHordeum vulgaree0
- Interactor
- weed communitiese0weed
- Outcome
- grain yielde0
- Direction
- did not depende0
- Comparator
- taxonomic biodiversity of weed communitiese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Spring barley grain yield did not depend on taxonomic biodiversity of weed communities”
The same questions in other papers
rotation · weed · Hordeum vulgare (barley)Positive and negative results
2 papers in the same direction as this paper · 2 reporting no difference from an alternative
- positive
- positive
- negative
1 paper more in this group
See all 5 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.