Abstract
Soil salinity is well known heterogeneous and various within natural soil environment. In Songnen grassland of Northeast China, grazing aggravates the saline-alkali heterogeneity in soil habitat, which led to dominant clonal plant species forming a variety of adaptive strategies. However, based on the previous studies of morphological plasticity and clonal integration in clonal plants, there was a lack of mechanism research on the spatial expansion strategy of clonal plants population subjected to clipping in saline-alkali heterogeneity soil patches. To address this knowledge gap, we carried out an experiment by applying different clipping intensities (0%, 35%, 70% of the above-ground biomass removed) to explore the spatial expansion strategy and morphological plasticity of Leymus chinensis and their belowground rhizomes in different heterogeneous saline-alkali patches. We found that, clipping significantly decreased the plant average height and above-ground biomass in homogeneous patches, especially heavy clipping had a significant adverse impact on plant belowground (rhizome, fine root) biomass and leaf area. However, there was no significant difference in the biomass, average height, and leaf area among the clipping treatments in low saline-alkali heterogeneous patches. In addition, the number of leaves, daughter plants and rhizome internode buds were significantly affected by saline-alkali heterogeneity alone, and low saline-alkali heterogeneity had a positive effect on these parameters. Biomass accumulation and rhizome expansion were gradually inhibited by the increasing of clipping intensity in a homogeneous environment, but the inhibitory effect of clipping was not significant in saline-alkali patches soil. We concluded that L. chinensis can respond to grazing or mowing disturbance by increasing tiller and daughter-plant numbers in a saline-alkali heterogeneous environment. The saline-alkali patches promoted clonal plant population spatial expansion more than grazing or mowing disturbance did. This study emphasizes saline-alkali heterogeneity distribution patterns in grassland soil environment were the primary and important driving factor promoting the spatial expansion of L. chinensis .
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Claims 17
Claim · model-written summary
Clipping decreased mean plant height in homogeneous patches.
- Taxon
- Leymus chinensisLeymus chinensist0
- Treatment
- clippinge0
- Outcome
- plant average heighte0
- Direction
- decreasede0
Not reportedComparator
Verbatim
e0“clipping significantly decreased the plant average height and above-ground biomass in homogeneous patches”
t0“Leymus chinensis”
Claim · model-written summary
Clipping decreased aboveground biomass in homogeneous patches.
- Taxon
- Leymus chinensisLeymus chinensist0
- Treatment
- clippinge0
- Outcome
- above-ground biomasse0
- Direction
- decreasede0
Not reportedComparator
Verbatim
e0“clipping significantly decreased the plant average height and above-ground biomass in homogeneous patches”
t0“Leymus chinensis”
Claim · model-written summary
Heavy clipping adversely affected rhizome biomass.
- Taxon
- Leymus chinensisLeymus chinensist0
- Treatment
- heavy clippinge0
- Outcome
- rhizomee0
- Direction
- adversee0
Not reportedComparator
Verbatim
e0“especially heavy clipping had a significant adverse impact on plant belowground (rhizome, fine root) biomass and leaf area”
t0“Leymus chinensis”
Claim · model-written summary
Heavy clipping adversely affected fine-root biomass.
- Taxon
- Leymus chinensisLeymus chinensist0
- Treatment
- heavy clippinge0
- Outcome
- fine roote0
- Direction
- adversee0
Not reportedComparator
Verbatim
e0“especially heavy clipping had a significant adverse impact on plant belowground (rhizome, fine root) biomass and leaf area”
t0“Leymus chinensis”
Claim · model-written summary
Heavy clipping adversely affected leaf area.
- Taxon
- Leymus chinensisLeymus chinensist0
- Treatment
- heavy clippinge0
- Outcome
- leaf areae0
- Direction
- adversee0
Not reportedComparator
Verbatim
e0“especially heavy clipping had a significant adverse impact on plant belowground (rhizome, fine root) biomass and leaf area”
t0“Leymus chinensis”
Claim · model-written summary
Clipping treatments did not differ significantly in biomass in low saline–alkali heterogeneous patches.
- Taxon
- Leymus chinensisLeymus chinensist0
- Treatment
- clipping treatmentse0
- Outcome
- biomasse0
- Direction
- no significant differencee0
Not reportedComparator
Verbatim
e0“there was no significant difference in the biomass, average height, and leaf area among the clipping treatments in low saline-alkali heterogeneous patches”
t0“Leymus chinensis”
Claim · model-written summary
Clipping treatments did not differ significantly in mean height in low saline–alkali heterogeneous patches.
- Taxon
- Leymus chinensisLeymus chinensist0
- Treatment
- clipping treatmentse0
- Outcome
- average heighte0
- Direction
- no significant differencee0
Not reportedComparator
Verbatim
e0“there was no significant difference in the biomass, average height, and leaf area among the clipping treatments in low saline-alkali heterogeneous patches”
t0“Leymus chinensis”
Claim · model-written summary
Clipping treatments did not differ significantly in leaf area in low saline–alkali heterogeneous patches.
- Taxon
- Leymus chinensisLeymus chinensist0
- Treatment
- clipping treatmentse0
- Outcome
- leaf areae0
- Direction
- no significant differencee0
Not reportedComparator
Verbatim
e0“there was no significant difference in the biomass, average height, and leaf area among the clipping treatments in low saline-alkali heterogeneous patches”
t0“Leymus chinensis”
Claim · model-written summary
Low saline–alkali heterogeneity positively affected leaf number.
- Taxon
- Leymus chinensisLeymus chinensist0
- Treatment
- low saline-alkali heterogeneitye0
- Outcome
- number of leavese0
- Direction
- positive effecte0
Not reportedComparator
Verbatim
e0“the number of leaves, daughter plants and rhizome internode buds were significantly affected by saline-alkali heterogeneity alone, and low saline-alkali heterogeneity had a positive effect on these parameters”
t0“Leymus chinensis”
Claim · model-written summary
Low saline–alkali heterogeneity positively affected daughter-plant number.
- Taxon
- Leymus chinensisLeymus chinensist0
- Treatment
- low saline-alkali heterogeneitye0
- Outcome
- daughter plantse0
- Direction
- positive effecte0
Not reportedComparator
Verbatim
e0“the number of leaves, daughter plants and rhizome internode buds were significantly affected by saline-alkali heterogeneity alone, and low saline-alkali heterogeneity had a positive effect on these parameters”
t0“Leymus chinensis”
Claim · model-written summary
Low saline–alkali heterogeneity positively affected rhizome internode bud number.
- Taxon
- Leymus chinensisLeymus chinensist0
- Treatment
- low saline-alkali heterogeneitye0
- Outcome
- rhizome internode budse0
- Direction
- positive effecte0
Not reportedComparator
Verbatim
e0“the number of leaves, daughter plants and rhizome internode buds were significantly affected by saline-alkali heterogeneity alone, and low saline-alkali heterogeneity had a positive effect on these parameters”
t0“Leymus chinensis”
Claim · model-written summary
Increasing clipping intensity inhibited biomass accumulation in homogeneous soil.
- Taxon
- Leymus chinensisLeymus chinensist0
- Treatment
- increasing of clipping intensitye0
- Outcome
- Biomass accumulatione0
- Direction
- inhibitede0
Not reportedComparator
Verbatim
e0“Biomass accumulation and rhizome expansion were gradually inhibited by the increasing of clipping intensity in a homogeneous environment”
t0“Leymus chinensis”
Claim · model-written summary
Increasing clipping intensity inhibited rhizome expansion in homogeneous soil.
- Taxon
- Leymus chinensisLeymus chinensist0
- Treatment
- increasing of clipping intensitye0
- Outcome
- rhizome expansione0
- Direction
- inhibitede0
Not reportedComparator
Verbatim
e0“Biomass accumulation and rhizome expansion were gradually inhibited by the increasing of clipping intensity in a homogeneous environment”
t0“Leymus chinensis”
Claim · model-written summary
The inhibitory effect of clipping was nonsignificant in saline–alkali patches.
- Taxon
- Leymus chinensisLeymus chinensist0
- Outcome
- inhibitory effect of clippinge0
Verbatim
e0“the inhibitory effect of clipping was not significant in saline-alkali patches soil”
t0“Leymus chinensis”
Claim · model-written summary
Leymus chinensis responded to disturbance by increasing tiller numbers in heterogeneous soil.
- Taxon
- L. chinensisLeymus chinensise0
- Treatment
- grazing or mowing disturbancee0
- Outcome
- tillere0
- Direction
- increasinge0
Verbatim
e0“L. chinensis can respond to grazing or mowing disturbance by increasing tiller and daughter-plant numbers in a saline-alkali heterogeneous environment”
Claim · model-written summary
Leymus chinensis responded to disturbance by increasing daughter-plant numbers in heterogeneous soil.
- Taxon
- L. chinensisLeymus chinensise0
- Treatment
- grazing or mowing disturbancee0
- Outcome
- daughter-plant numberse0
- Direction
- increasinge0
Verbatim
e0“L. chinensis can respond to grazing or mowing disturbance by increasing tiller and daughter-plant numbers in a saline-alkali heterogeneous environment”
Claim · model-written summary
Saline–alkali patches promoted clonal spatial expansion more than disturbance did.
Verbatim
e0“The saline-alkali patches promoted clonal plant population spatial expansion more than grazing or mowing disturbance did.”
t0“Leymus chinensis”
The same questions in other papers
salinity · growth · Leymus chinensisResults differ
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See all 6 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.