Abstract
This thesis focused on Leymus chinensis and Phragmites communis litter in Songnen grassland.Infrared heater was used to increase the temperature.The simulation of nitrogen deposition was made by applying fertilizer.The responses of litter decomposition to warming and nitrogen application was examined.The result showed that warming and nitrogen application both significant increased litter decomposition rates in a certain extent.The order of decomposition residual rate of L.chinensis were warming+nitrogen application(69.30%),nitrogen application(75.75%),warming(81.20%),control(83.80%);The order of decomposition residual rate of P.communis were warming+nitrogen(78.85%),nitrogen application(83.25%),control(85.60%),warming(86.50%).Warming and nitrogen application treatments shortened the decomposition periods of L.chinensis and P.communis litter by Olson model.The linear regression showed that the regression coefficient of bacteria was the max among four treatments of two species;can explain that bacterial biomass was the most important factor during litter decomposition.In the course of litter decomposition,the relatedness of litter decomposition quality with organic C content was positively positive correlation.The content of total nitrogen and total phosphorus in litter have existed settling phenomena.
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Claims 13
Claim · model-written summary
Warming and nitrogen application increased litter decomposition rates of both species to a certain extent in Songnen grassland.
- Taxon
- Leymus chinensis and Phragmites communis
Phragmites australisLeymus chinensise1 - Organ / stage
- littere1
- Treatment
- warming and nitrogen applicatione0
- Outcome
- litter decomposition ratese0
- Direction
- increasede0
- Qualifier
- in a certain extente0
- Comparator
- controle2
- Setting
- Songnen grasslande1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“warming and nitrogen application both significant increased litter decomposition rates in a certain extent”
e1“focused on Leymus chinensis and Phragmites communis litter in Songnen grassland”
e2“The order of decomposition residual rate of L.chinensis were warming+nitrogen application(69.30%),nitrogen application(75.75%),warming(81.20%),control(83.80%)”
Claim · model-written summary
Leymus chinensis litter had a decomposition residual rate of 69.30% under warming plus nitrogen application.
- Taxon
- L.chinensisLeymus chinensise2
- Treatment
- warming+nitrogen applicatione2
- Outcome
- decomposition residual ratee2
- Value
- 69.30%e2
Verbatim
e2“The order of decomposition residual rate of L.chinensis were warming+nitrogen application(69.30%),nitrogen application(75.75%),warming(81.20%),control(83.80%)”
Claim · model-written summary
Leymus chinensis litter had a decomposition residual rate of 75.75% under nitrogen application.
- Taxon
- L.chinensisLeymus chinensise2
- Treatment
- nitrogen applicatione2
- Outcome
- decomposition residual ratee2
- Value
- 75.75%e2
Verbatim
e2“The order of decomposition residual rate of L.chinensis were warming+nitrogen application(69.30%),nitrogen application(75.75%),warming(81.20%),control(83.80%)”
Claim · model-written summary
Leymus chinensis litter had a decomposition residual rate of 81.20% under warming.
- Taxon
- L.chinensisLeymus chinensise2
- Treatment
- warminge2
- Outcome
- decomposition residual ratee2
- Value
- 81.20%e2
Verbatim
e2“The order of decomposition residual rate of L.chinensis were warming+nitrogen application(69.30%),nitrogen application(75.75%),warming(81.20%),control(83.80%)”
Claim · model-written summary
Leymus chinensis litter had a decomposition residual rate of 83.80% in control.
- Taxon
- L.chinensisLeymus chinensise2
- Treatment
- controle2
- Outcome
- decomposition residual ratee2
- Value
- 83.80%e2
Verbatim
e2“The order of decomposition residual rate of L.chinensis were warming+nitrogen application(69.30%),nitrogen application(75.75%),warming(81.20%),control(83.80%)”
Claim · model-written summary
Phragmites communis litter had a decomposition residual rate of 78.85% under warming plus nitrogen application.
- Taxon
- P.communisPhragmites australise3
- Treatment
- warming+nitrogene3
- Outcome
- decomposition residual ratee3
- Value
- 78.85%e3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“The order of decomposition residual rate of P.communis were warming+nitrogen(78.85%),nitrogen application(83.25%),control(85.60%),warming(86.50%)”
Claim · model-written summary
Phragmites communis litter had a decomposition residual rate of 83.25% under nitrogen application.
- Taxon
- P.communisPhragmites australise3
- Treatment
- nitrogen applicatione3
- Outcome
- decomposition residual ratee3
- Value
- 83.25%e3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“The order of decomposition residual rate of P.communis were warming+nitrogen(78.85%),nitrogen application(83.25%),control(85.60%),warming(86.50%)”
Claim · model-written summary
Phragmites communis litter had a decomposition residual rate of 85.60% in control.
- Taxon
- P.communisPhragmites australise3
- Treatment
- controle3
- Outcome
- decomposition residual ratee3
- Value
- 85.60%e3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“The order of decomposition residual rate of P.communis were warming+nitrogen(78.85%),nitrogen application(83.25%),control(85.60%),warming(86.50%)”
Claim · model-written summary
Phragmites communis litter had a decomposition residual rate of 86.50% under warming.
- Taxon
- P.communisPhragmites australise3
- Treatment
- warminge3
- Outcome
- decomposition residual ratee3
- Value
- 86.50%e3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“The order of decomposition residual rate of P.communis were warming+nitrogen(78.85%),nitrogen application(83.25%),control(85.60%),warming(86.50%)”
Claim · model-written summary
Warming and nitrogen application shortened the decomposition periods of Leymus chinensis and Phragmites communis litter, by the Olson model.
- Taxon
- L.chinensis and P.communisPhragmites australisLeymus chinensise4
- Treatment
- Warming and nitrogen applicatione4
- Outcome
- decomposition periodse4
- Direction
- shortenede4
- Qualifier
- by Olson modele4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e4“Warming and nitrogen application treatments shortened the decomposition periods of L.chinensis and P.communis litter by Olson model”
Claim · model-written summary
Bacterial biomass is proposed as the most important factor during litter decomposition of the two species.
- Taxon
- Leymus chinensis and Phragmites communisPhragmites australisLeymus chinensise1
- Outcome
- litter decompositione5
- Qualifier
- bacterial biomass was the most important factore5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“focused on Leymus chinensis and Phragmites communis litter in Songnen grassland”
e5“can explain that bacterial biomass was the most important factor during litter decomposition”
Claim · model-written summary
Litter decomposition quality was positively correlated with organic C content of the litter.
- Taxon
- Leymus chinensis and Phragmites communisPhragmites australisLeymus chinensise1
- Compound
- organic Ce6
- Outcome
- litter decomposition qualitye6
- Direction
- positivelye6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“focused on Leymus chinensis and Phragmites communis litter in Songnen grassland”
e6“the relatedness of litter decomposition quality with organic C content was positively positive correlation”
Claim · model-written summary
Total nitrogen and total phosphorus content in litter showed settling phenomena.
- Taxon
- Leymus chinensis and Phragmites communisPhragmites australisLeymus chinensise1
- Organ / stage
- littere7
- Outcome
- content of total nitrogen and total phosphoruse7
- Qualifier
- settling phenomenae7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“focused on Leymus chinensis and Phragmites communis litter in Songnen grassland”
e7“The content of total nitrogen and total phosphorus in litter have existed settling phenomena”