Abstract
Effects of soil saline type on the root spatial distribution pattern and growth characteristics of switchgrass(Panicum virgatum L.) were studied using soil column method to define the response mechanism of switchgrass on different salt stress(NaCl 0.40%,Na2SO4 0.80% and NaHCO3 0.80%) and to provide a theoretical basis of cultivation management.Results showed that the size of tope third leaf,leaf chlorophyll-a content,above-and underground root biomass,total biomass,seed yield,and the ratio of root to shoot were significantly decreased under soil salinity treatments,whereas leaf chlorophyll-b and total chlorophyll content increased.Total root length,root surface area,and root volumes were inhibited.Under NaCl treatment,the plant height was not significantly different from that of CK.Roots concentrated growth in 0～40 cm of soil layer with biomass gravity changing to 23 cm from 50 cm(CK) soil layer.Under Na2SO4 treatment,root distributed in 0～120 cm of soil layer and gradually decreased along with the increasing of soil depth.Under NaHCO3 treatment,root concentrated growth in 0～80 cm of soil layer with biomass gravity in 18 cm of soil layer.There were significant influences on root extending of switchgrass in NaCl and NaHCO3 treatment,but small influences in Na2SO4 treatment.
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Claims 9
Claim · model-written summary
Soil salinity significantly reduced switchgrass top third leaf size, leaf chlorophyll-a content and aboveground and underground root biomass.
- Taxon
- Switchgrass
Panicum virgatumt0 - Treatment
- soil salinity treatmentse0
- Outcome
- size of tope third leaf,leaf chlorophyll-a content,above-and underground root biomasse0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“size of tope third leaf,leaf chlorophyll-a content,above-and underground root biomass,total biomass,seed yield,and the ratio of root to shoot were significantly decreased under soil salinity treatments”
t0“Switchgrass”
Claim · model-written summary
Soil salinity significantly reduced switchgrass total biomass, seed yield and root to shoot ratio.
- Taxon
- SwitchgrassPanicum virgatumt0
- Treatment
- soil salinity treatmentse0
- Outcome
- total biomass,seed yield,and the ratio of root to shoote0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“total biomass,seed yield,and the ratio of root to shoot were significantly decreased under soil salinity treatments”
t0“Switchgrass”
Claim · model-written summary
Soil salinity increased switchgrass leaf chlorophyll-b and total chlorophyll content.
- Taxon
- SwitchgrassPanicum virgatumt0
- Treatment
- soil salinity treatmentse1
- Outcome
- leaf chlorophyll-b and total chlorophyll contente0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“whereas leaf chlorophyll-b and total chlorophyll content increased”
e1“under soil salinity treatments”
t0“Switchgrass”
Claim · model-written summary
Salinity inhibited switchgrass total root length, surface area and volume.
- Taxon
- SwitchgrassPanicum virgatumt0
- Treatment
- soil salinity treatmentse1
- Outcome
- Total root length,root surface area,and root volumese0
- Direction
- inhibitede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Total root length,root surface area,and root volumes were inhibited.”
e1“under soil salinity treatments”
t0“Switchgrass”
Claim · model-written summary
NaCl did not significantly change switchgrass plant height relative to CK.
- Taxon
- SwitchgrassPanicum virgatumt0
- Treatment
- NaCl treatmente0
- Outcome
- plant heighte0
- Direction
- not significantly differente0
- Comparator
- CKe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Under NaCl treatment,the plant height was not significantly different from that of CK.”
t0“Switchgrass”
Claim · model-written summary
Under NaCl, switchgrass roots were concentrated at 0～40 cm, with biomass gravity at 23 cm versus 50 cm in CK.
- Taxon
- SwitchgrassPanicum virgatumt0
- Organ / stage
- Rootse0
- Treatment
- NaCl treatmente0
- Outcome
- Roots concentrated growthe0
- Direction
- changing toe0
- Value
- 23 cme0
- Qualifier
- 0～40 cm of soil layere0
- Comparator
- CKe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Under NaCl treatment,the plant height was not significantly different from that of CK.Roots concentrated growth in 0～40 cm of soil layer with biomass gravity changing to 23 cm from 50 cm(CK) soil layer.”
t0“Switchgrass”
Claim · model-written summary
Under Na2SO4, switchgrass roots extended through 0～120 cm and decreased with depth.
- Taxon
- SwitchgrassPanicum virgatumt0
- Treatment
- Na2SO4 treatmente0
- Outcome
- root distributede0
- Direction
- gradually decreasede0
- Value
- 0～120 cme0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Under Na2SO4 treatment,root distributed in 0～120 cm of soil layer and gradually decreased along with the increasing of soil depth.”
t0“Switchgrass”
Claim · model-written summary
Under NaHCO3, switchgrass roots concentrated in the upper 0～80 cm, with biomass gravity at 18 cm.
- Taxon
- SwitchgrassPanicum virgatumt0
- Treatment
- NaHCO3 treatmente0
- Outcome
- root concentrated growthe0
- Value
- 18 cme0
- Qualifier
- 0～80 cm of soil layere0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Under NaHCO3 treatment,root concentrated growth in 0～80 cm of soil layer with biomass gravity in 18 cm of soil layer.”
t0“Switchgrass”
Claim · model-written summary
NaCl and NaHCO3 significantly influenced switchgrass root extension, whereas Na2SO4 had little influence.
- Taxon
- switchgrassPanicum virgatume0
- Treatment
- NaCl and NaHCO3 treatmente0
- Outcome
- root extendinge0
- Qualifier
- small influences in Na2SO4 treatmente0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“There were significant influences on root extending of switchgrass in NaCl and NaHCO3 treatment,but small influences in Na2SO4 treatment.”
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3 papers more in this group
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1 paper in the same direction as this paper
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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.