Abstract
Impacts of aboveground herbivores on belowground soil ecosystem have attracted considerable attention by terrestrial ecologists.A factorial experiment,in which rice variety and brown planthopper(Nilaparvata lugens Stl) were selected as factors,was conducted to clarify whether the aboveground herbivores and rice varieties interactively affected rice seedling growth and soil labile carbon(C) and nitrogen(N).Soil microbial biomass C and N,dissolved organic C and nitrogen,and mineral N,were measured to assess soil labile C and N.The results indicated that brown planthopper generally decreased aboveground(shoot) and belowground(root) biomass,as well as the root to shoot ratio,depending on rice varieties' capabilities of resisting to brown planthopper.Soil labile C and N fractions were also affected significantly by brown planthopper as well as its interaction with rice variety(P 0.05).In the presence of herbivory,the soil microbial biomass C and dissolved organic C decreased under susceptible rice variety Guangsi,but increased under resistant rice variety IR36.In addition,the brown planthopper generally promoted microbial biomass N,dissolved organic N and nitrate content under resistant rice variety IR36.With herbivory present,distinctly effects on soil labile C and N fractions also existed between the intermediate susceptible rice varieties Shanyou63 and Shanyou559.We found Shanyou63 was close to susceptible variety Guangsi,while Shanyou559 was close to resistant variety IR36.In conclusion,the responsive trends of soil labile C and N fractions to aboveground herbivory rely on rice variety characteristics,with resistant varieties showing more beneficial effects on maintenance of labile C and N,which may consequently promote soil biological activity and cascade up to soil ecological functioning.
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Claims 6
Claim · model-written summary
Brown planthopper reduced rice shoot and root biomass and root to shoot ratio, conditional on varietal resistance.
- Taxon
- rice
Oryza sativae0 - Treatment
- brown planthoppere0
- Interactor
- brown planthopper
Nilaparvata lugense0herbivore - Outcome
- aboveground(shoot) and belowground(root) biomass,as well as the root to shoot ratioe0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“brown planthopper generally decreased aboveground(shoot) and belowground(root) biomass,as well as the root to shoot ratio,depending on rice varieties' capabilities of resisting to brown planthopper”
Claim · model-written summary
Herbivory decreased soil microbial biomass carbon and dissolved organic carbon under susceptible Guangsi.
- Taxon
- riceOryza sativae0
- Material
- Guangsie0
- Treatment
- herbivorye0
- Outcome
- soil microbial biomass C and dissolved organic Ce0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In the presence of herbivory,the soil microbial biomass C and dissolved organic C decreased under susceptible rice variety Guangsi”
Claim · model-written summary
Herbivory increased soil microbial biomass carbon and dissolved organic carbon under resistant IR36.
- Taxon
- riceOryza sativae0
- Material
- IR36e0
- Treatment
- herbivorye0
- Outcome
- soil microbial biomass C and dissolved organic Ce0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In the presence of herbivory,the soil microbial biomass C and dissolved organic C decreased under susceptible rice variety Guangsi,but increased under resistant rice variety IR36”
t0“Herbivory by the brown planthopper ( Nilaparvata lugens Stl) affects rice seedling growth and belowground soil labile organic carbon and nitrogen fractions”
Claim · model-written summary
Brown planthopper promoted microbial biomass nitrogen, dissolved organic nitrogen and nitrate under IR36.
- Taxon
- riceOryza sativae0
- Material
- IR36e0
- Treatment
- brown planthoppere0
- Interactor
- brown planthopperNilaparvata lugense0herbivore
- Outcome
- microbial biomass N,dissolved organic N and nitrate contente0
- Direction
- promotede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the brown planthopper generally promoted microbial biomass N,dissolved organic N and nitrate content under resistant rice variety IR36”
Claim · model-written summary
Shanyou63 soil labile carbon and nitrogen responses resembled Guangsi.
- Taxon
- riceOryza sativat0
- Material
- Shanyou63e0
- Outcome
- close to susceptible variety Guangsie0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“We found Shanyou63 was close to susceptible variety Guangsi”
t0“rice seedling growth”
Claim · model-written summary
Shanyou559 soil labile carbon and nitrogen responses resembled IR36.
- Taxon
- riceOryza sativat0
- Material
- Shanyou559e0
- Outcome
- close to resistant variety IR36e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“while Shanyou559 was close to resistant variety IR36”
t0“rice seedling growth”
The same questions in other papers
Nilaparvata lugens · growth · Oryza sativa (rice)Results agree
3 papers in the same direction as this paper
- negative
- negative
- negative
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.