Abstract
Couch grass (Elytrigia repens) is a problematic weed, native to Europe and commonly found in grassland and agricultural land, causing a decrease in yield in many agricultural crops. Two climate chamber experiments were conducted to investigate how competition from cover crops like red clover (Trifolium pretense var. Titus) and rye-grass (Lolium perenne var. Irene) changes the biomass allocation and morphology of couch grass. In the first experiment, couch grass was grown in different combinations (low, medium and high competition) with rye-grass. In the second experiment it was grown with rye-grass, red clover and with both together. The results showed a decrease of above ground biomass allocation of couch grass, and also distinctive features in morphology in nodes, branching points, leaf area and leaf density from control. In experiments with rye-grass, got significant results in number of shoots per pots and above ground biomass of couch grass, pointing towards decrease in the above ground parts of couch grass due to competition from cover crop and a trend in the case of branching points and number nodes. The results of rhizome weight found to be insignificant in both experiments. It was found that competition from cover crop especially rye-grass affected biomass allocation and morphology of couch grass in a simulated environment after harvest and thereby effective in control couch grass in the following season.
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The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 7
Claim · model-written summary
Cover crop competition decreased aboveground biomass allocation in couch grass.
Verbatim
e0“The results showed a decrease of above ground biomass allocation of couch grass”
e1“how competition from cover crops like red clover”
e2“from control”
Claim · model-written summary
Cover crop competition changed couch grass nodes, branching points, leaf area and leaf density relative to control.
- Taxon
- couch grasst0
- Treatment
- competition from cover cropse1
- Outcome
- morphology in nodes, branching points, leaf area and leaf densitye0
- Comparator
- controle0
Not reportedDirection
Verbatim
e0“distinctive features in morphology in nodes, branching points, leaf area and leaf density from control”
e1“how competition from cover crops like red clover”
t0“couch grass”
Claim · model-written summary
Rye-grass competition significantly reduced couch grass shoot number.
LoliumNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In experiments with rye-grass, got significant results in number of shoots per pots and above ground biomass of couch grass, pointing towards decrease in the above ground parts of couch grass due to competition from cover crop”
t0“couch grass”
Claim · model-written summary
Rye-grass competition significantly reduced couch grass aboveground biomass.
- Taxon
- couch grasst0
- Treatment
- rye-grasse0
- Outcome
- above ground biomass of couch grasse0
- Direction
- decreasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In experiments with rye-grass, got significant results in number of shoots per pots and above ground biomass of couch grass, pointing towards decrease in the above ground parts of couch grass due to competition from cover crop”
t0“couch grass”
Claim · model-written summary
Branching points and node number showed a trend under rye-grass competition.
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a trend in the case of branching points and number nodes”
e1“In experiments with rye-grass”
t0“couch grass”
Claim · model-written summary
Competition treatments did not yield a statistically significant difference in couch grass rhizome weight.
Not reportedComparatorDirection
Verbatim
e0“The results of rhizome weight found to be insignificant in both experiments.”
e1“how competition from cover crops like red clover”
t0“couch grass”
Claim · model-written summary
The authors judged cover crop competition, especially rye-grass, effective for subsequent couch grass control.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“competition from cover crop especially rye-grass affected biomass allocation and morphology of couch grass in a simulated environment after harvest and thereby effective in control couch grass in the following season.”