Abstract
soil during plant growth in monoculture or with L. chinensis being planted in mixing with other two species, respectively. There were significant effects on biomass of L. chinensis and A. adsurgens, but not on that of S. krylovii with increase of N and BR addition. The effects of N addition on the growth of L. chinensis varied with accompanying plant species. Nitrogen addition increased aboveground biomass production of L. chinensis when growing in monoculture and mixed with A. adsurgens, but decreased its belowground biomass when growing mixed with S. krylovii. With increasing soil N availability, plant biomass allocation of L. chinensis showed significant decrease in root-shoot ratio when it was in monoculture or mixed with S. krylovii, but similar changes were not found when it was planted in mixing with A. adsurgens. The significant effects of BR addition on plant growth appeared occasionally. BR addition significantly reduced belowground biomass of A. adsurgens in its monoculture and significantly increased aboveground biomass of L. chinensis when it was planted in mixing with A. adsurgens. The results indicated that the appropria-tely combined addition of N and BR could effectively enhance biomass production of specific species combinations in grasslands, which has application prospects in the restoration of degraded grassland.
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Claims 12
Claim · model-written summary
Increased N and BR addition significantly affected L. chinensis biomass.
- Taxon
- L. chinensisLeymus chinensise0
- Treatment
- increase of N and BR additione0
- Outcome
- biomass of L. chinensise0
Not reportedComparatorDirection
Verbatim
e0“There were significant effects on biomass of L. chinensis and A. adsurgens, but not on that of S. krylovii with increase of N and BR addition.”
Claim · model-written summary
Increased N and BR addition significantly affected A. adsurgens biomass.
- Taxon
- A. adsurgense0
- Treatment
- increase of N and BR additione0
- Outcome
- biomass of L. chinensis and A. adsurgense0
Not reportedComparatorDirection
Verbatim
e0“There were significant effects on biomass of L. chinensis and A. adsurgens, but not on that of S. krylovii with increase of N and BR addition.”
Claim · model-written summary
Increased N and BR addition had no significant effect on S. krylovii biomass.
- Taxon
- S. kryloviie0
- Treatment
- increase of N and BR additione0
- Outcome
- that of S. kryloviie0
- Direction
- note0
Not reportedComparator
Verbatim
e0“There were significant effects on biomass of L. chinensis and A. adsurgens, but not on that of S. krylovii with increase of N and BR addition.”
Claim · model-written summary
Nitrogen addition increased aboveground L. chinensis biomass in monoculture.
- Taxon
- L. chinensisLeymus chinensise0
- Treatment
- Nitrogen additione0
- Outcome
- aboveground biomass production of L. chinensise0
- Direction
- increasede0
- Qualifier
- in monoculturee0
Not reportedComparator
Verbatim
e0“Nitrogen addition increased aboveground biomass production of L. chinensis when growing in monoculture and mixed with A. adsurgens”
Claim · model-written summary
Nitrogen addition increased aboveground L. chinensis biomass when mixed with A. adsurgens.
- Taxon
- L. chinensisLeymus chinensise0
- Treatment
- Nitrogen additione0
- Interactor
- A. adsurgense0other
- Outcome
- aboveground biomass production of L. chinensise0
- Direction
- increasede0
Not reportedComparator
Verbatim
e0“Nitrogen addition increased aboveground biomass production of L. chinensis when growing in monoculture and mixed with A. adsurgens”
Claim · model-written summary
Nitrogen addition decreased belowground L. chinensis biomass in mixture with S. krylovii.
- Taxon
- Leymus chinensisLeymus chinensist0
- Treatment
- Nitrogen additione1
- Interactor
- S. kryloviie0other
- Outcome
- belowground biomasse0
- Direction
- decreasede0
Not reportedComparator
Verbatim
e0“but decreased its belowground biomass when growing mixed with S. krylovii.”
e1“Nitrogen addition”
t0“Leymus chinensis”
Claim · model-written summary
Increasing soil N availability significantly decreased the L. chinensis root shoot ratio in monoculture.
Verbatim
e0“With increasing soil N availability, plant biomass allocation of L. chinensis showed significant decrease in root-shoot ratio when it was in monoculture or mixed with S. krylovii”
Claim · model-written summary
Increasing soil N availability significantly decreased the L. chinensis root shoot ratio in mixture with S. krylovii.
Verbatim
e0“With increasing soil N availability, plant biomass allocation of L. chinensis showed significant decrease in root-shoot ratio when it was in monoculture or mixed with S. krylovii”
Claim · model-written summary
Comparable root shoot ratio changes were not found in L. chinensis mixed with A. adsurgens.
Verbatim
e0“but similar changes were not found when it was planted in mixing with A. adsurgens.”
e1“increasing soil N availability”
t0“Leymus chinensis”
Claim · model-written summary
BR addition significantly reduced belowground A. adsurgens biomass in monoculture.
- Taxon
- A. adsurgense0
- Treatment
- BR additione0
- Outcome
- belowground biomass of A. adsurgense0
- Direction
- reducede0
Not reportedComparator
Verbatim
e0“BR addition significantly reduced belowground biomass of A. adsurgens in its monoculture”
Claim · model-written summary
BR addition significantly increased aboveground L. chinensis biomass in mixture with A. adsurgens.
- Taxon
- L. chinensisLeymus chinensise0
- Treatment
- BR additione0
- Interactor
- A. adsurgense0other
- Outcome
- aboveground biomass of L. chinensise0
- Direction
- increasede0
Not reportedComparator
Verbatim
e0“BR addition significantly reduced belowground biomass of A. adsurgens in its monoculture and significantly increased aboveground biomass of L. chinensis when it was planted in mixing with A. adsurgens.”
Claim · model-written summary
The authors conclude that combined N and BR addition could enhance biomass in specific grassland species combinations.
- Taxon
- Leymus chinensisLeymus chinensist0
- Outcome
- enhance biomass production of specific species combinations in grasslandse0
Verbatim
e0“the appropria-tely combined addition of N and BR could effectively enhance biomass production of specific species combinations in grasslands”
t0“Leymus chinensis”
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