Abstract
Infestation with Cirsium arvense in organic cropping is an increasing problem in many parts of Europe. A very expansive root system and the ability to form new aerial shoots from root buds facilitate formation of dense patches only a few years after establishment. In the present study, repeated mowing during the first part of the growing season used in combination with a competitive crop is suggested as a control strategy, aiming at diminishing the regenerative capacity of C. arvense. In general, the results from our two experiments showed a linear relationship between the number of mowing passes and the aboveground biomass of C. arvense in the subsequent year. A comparison of the two regression lines within each experiment showed that in both experiments there was no difference between the regression coefficients, whereas the intercepts differed significantly from each other, suggesting that the presence of a competitive crop, here a grass/white clover mixture, is likely to suppress the growth of C. arvense significantly. Hence, our results support the hypothesis that a continuous depletion of carbohydrates from the root system, caused by mowing and/or the use of a competitive crop, will diminish the regrowth capacity of the plant.
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Claims 5
Claim · model-written summary
Number of mowing passes was linearly related to subsequent-year aboveground biomass of Cirsium arvense.
- Taxon
- Cirsium arvense
Cirsium arvenset0 - Treatment
- number of mowing passese0
- Outcome
- aboveground biomass of C. arvensee0
- Qualifier
- in the subsequent yeare0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a linear relationship between the number of mowing passes and the aboveground biomass of C. arvense in the subsequent year”
t0“Cirsium arvense”
Claim · model-written summary
Regression coefficients for mowing and biomass did not differ between the two regression lines in either experiment.
- Taxon
- Cirsium arvenseCirsium arvenset0
- Outcome
- regression coefficientse0
- Direction
- no differencee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in both experiments there was no difference between the regression coefficients”
t0“Cirsium arvense”
Claim · model-written summary
Regression intercepts differed significantly within both experiments.
- Taxon
- Cirsium arvenseCirsium arvenset0
- Outcome
- interceptse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the intercepts differed significantly from each other”
t0“Cirsium arvense”
Claim · model-written summary
A grass/white clover competitive crop likely significantly suppresses Cirsium arvense growth.
- Taxon
- Cirsium arvenseCirsium arvenset0
- Treatment
- grass/white clover mixturee0
- Outcome
- growth of C. arvensee0
- Direction
- suppresse0
- Qualifier
- likelye0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the presence of a competitive crop, here a grass/white clover mixture, is likely to suppress the growth of C. arvense significantly”
t0“Cirsium arvense”
Claim · model-written summary
Mowing or competitive cropping supports depletion of root carbohydrates and diminished regrowth capacity.
- Taxon
- Cirsium arvenseCirsium arvenset0
- Treatment
- mowing and/or the use of a competitive crope0
- Outcome
- regrowth capacitye0
- Direction
- diminishe0
- Qualifier
- continuous depletion of carbohydrates from the root systeme0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a continuous depletion of carbohydrates from the root system, caused by mowing and/or the use of a competitive crop, will diminish the regrowth capacity of the plant”
t0“Cirsium arvense”