Abstract
Taking three succession plant communities in Hulunbeier Stipa krylovii steppe under different grazing intensities as test objects,this paper studied the underground biomass and root morphological characteristics of the communities and their constructive species.With increasing grazing intensity,both the community species composition and the root functional group types tended to be simplified.The underground biomass of the three communities presented a T-shape spatial distribution.The constructive species of the communities under different grazing intensities had an obvious substitution,with S.krylovii,Cleistogenes squarrosa and Allium polyrhizum as the constructive species under light,moderate and heavy grazing,and the root/shoot ratios of the constructive species decreased with increasing grazing intensity,being 0.47,1.0,and 4.1 under light,moderate and heavy grazing,respectively.The root number,root volume,root biomass,specific root length,and root length density also varied with different grazing intensities.Moreover,the root/shoot ratio and the specific root length showed a significant correlation with the content of soil available nitrogen(P0.05).
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Claims 10
Claim · model-written summary
Species composition simplified with increasing grazing intensity.
- Taxon
- Stipa krylovii
Stipa kryloviit0 - Treatment
- increasing grazing intensitye0
- Outcome
- community species compositione0
- Direction
- simplifiede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“With increasing grazing intensity,both the community species composition and the root functional group types tended to be simplified.”
t0“Stipa krylovii”
Claim · model-written summary
Root functional group types simplified with increasing grazing intensity.
- Taxon
- Stipa kryloviiStipa kryloviit0
- Treatment
- increasing grazing intensitye0
- Outcome
- root functional group typese0
- Direction
- simplifiede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“With increasing grazing intensity,both the community species composition and the root functional group types tended to be simplified.”
t0“Stipa krylovii”
Claim · model-written summary
Underground biomass of the three communities had a T-shape spatial distribution.
- Taxon
- Stipa kryloviiStipa kryloviit0
- Organ / stage
- undergrounde0
- Outcome
- T-shape spatial distributione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The underground biomass of the three communities presented a T-shape spatial distribution.”
t0“Stipa krylovii”
Claim · model-written summary
S. krylovii was constructive under light grazing.
- Taxon
- S.kryloviiStipa kryloviie0
- Treatment
- lighte0
- Outcome
- constructive species under lighte0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“S.krylovii,Cleistogenes squarrosa and Allium polyrhizum as the constructive species under light,moderate and heavy grazing”
Claim · model-written summary
Cleistogenes squarrosa was constructive under moderate grazing.
- Taxon
- Cleistogenes squarrosa
Cleistogenes squarrosae0 - Treatment
- moderatee0
- Outcome
- constructive species under light,moderate and heavy grazinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“S.krylovii,Cleistogenes squarrosa and Allium polyrhizum as the constructive species under light,moderate and heavy grazing”
Claim · model-written summary
Allium polyrhizum was constructive under heavy grazing.
- Taxon
- Allium polyrhizumAllium polyrhizume0
- Treatment
- heavye0
- Outcome
- constructive species under light,moderate and heavy grazinge0
Verbatim
e0“S.krylovii,Cleistogenes squarrosa and Allium polyrhizum as the constructive species under light,moderate and heavy grazing”
Claim · model-written summary
Root to shoot ratios of constructive species decreased with increasing grazing intensity.
- Taxon
- Stipa kryloviiStipa kryloviit0
- Treatment
- increasing grazing intensitye0
- Outcome
- root/shoot ratiose0
- Direction
- decreasede0
- Qualifier
- being 0.47,1.0,and 4.1 under light,moderate and heavy grazing,respectivelye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“root/shoot ratios of the constructive species decreased with increasing grazing intensity,being 0.47,1.0,and 4.1 under light,moderate and heavy grazing,respectively”
t0“Stipa krylovii”
Claim · model-written summary
Root number, volume, biomass, specific root length and root length density varied by grazing intensity.
- Taxon
- Stipa kryloviiStipa kryloviit0
- Treatment
- different grazing intensitiese0
- Outcome
- root number,root volume,root biomasse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The root number,root volume,root biomass,specific root length,and root length density also varied with different grazing intensities.”
t0“Stipa krylovii”
Claim · model-written summary
Root to shoot ratio correlated significantly with soil available nitrogen.
- Taxon
- Stipa kryloviiStipa kryloviit0
- Compound
- soil available nitrogene0
- Outcome
- root/shoot ratioe0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the root/shoot ratio and the specific root length showed a significant correlation with the content of soil available nitrogen(P0.05)”
t0“Stipa krylovii”
Claim · model-written summary
Specific root length correlated significantly with soil available nitrogen.
- Taxon
- Stipa kryloviiStipa kryloviit0
- Compound
- soil available nitrogene0
- Outcome
- specific root lengthe0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the root/shoot ratio and the specific root length showed a significant correlation with the content of soil available nitrogen(P0.05)”
t0“Stipa krylovii”