| Attributes | Values |
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| rdf:type
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| Description
| - V přirozených podmínkách jsme značili rostliny pomocí 13CO2 (2 hod) a sledovali jsme tok 13C asimilovaného rostlinami při fotosyntéze do různých frakcí půdní organické hmoty (POH) s cílem popsat jejich dynamiku a obrat. Transport 13C do kořenů a jeho exudace proběhly velmi rychle (v řádu desítek minut). C-13 v půdě byl nalezen v labilní frakci POH nebo v mikrobní biomase (40-70 % 13C v půdě v závislosti na čase odběru). Po skončení značení množství 13C s půdě exponenciálně klesalo. První rychlá fáze poklesu byla způsobena okamžitou mineralizací 13C (obrat 1,1 dne), druhá pomalejší fáze odpovídala obratu mikrobní biomasy (3,4 dne). Takto rychlý obrat biomasy je srovnatelný růstovými parametry mikroorganismů po přídavku substrátu, což indikuje, že růst mikroorganismů v rhizosféře není limitován dostupností C. Naše výsledky potvrzují rychlý obrat exudátů v půdě, důležitou roli mikroorganismů při jejich transformaci a jejich zanedbatelný příspěvek do stabilní POH. (cs)
- The flow of photosynthetically fixed C from plants to selected soil C pools was studied after 13CO2 pulse labeling of pasture plants under field conditions, dynamics of root-derived C in soil was assessed and turnover times of the soil C pools were estimated. The transport of the fixed C from shoots to the roots and into the soil was very fast. During 27 h, net C belowground allocation reached more than 10% of the fixed C and most of the C was already found in soil. Soil microbial biomass (CMIC) was the major sink of the fixed C within soil C pools (ca 40-70% of soil 13C depending on sampling time). Significant amounts of 13C were also found in other labile soil C pools connected with microbial activity, in soluble organic C and C associated with microbial biomass (hot-water extract from the soil residue after chloroform fumigation-extraction) and the 13C dynamics of all these pools followed that of the shoots. When the labelling (2 h) finished, the fixed 13C was exponentially lost from the plant-soil
- The flow of photosynthetically fixed C from plants to selected soil C pools was studied after 13CO2 pulse labeling of pasture plants under field conditions, dynamics of root-derived C in soil was assessed and turnover times of the soil C pools were estimated. The transport of the fixed C from shoots to the roots and into the soil was very fast. During 27 h, net C belowground allocation reached more than 10% of the fixed C and most of the C was already found in soil. Soil microbial biomass (CMIC) was the major sink of the fixed C within soil C pools (ca 40-70% of soil 13C depending on sampling time). Significant amounts of 13C were also found in other labile soil C pools connected with microbial activity, in soluble organic C and C associated with microbial biomass (hot-water extract from the soil residue after chloroform fumigation-extraction) and the 13C dynamics of all these pools followed that of the shoots. When the labelling (2 h) finished, the fixed 13C was exponentially lost from the plant-soil (en)
|
| Title
| - Fate and dynamics of recently fixed C in pasture plant-soil system under field conditions
- Tok a dynamika asimilovaného C v systému rostlina-půda v přirozených podmínkách (cs)
- Fate and dynamics of recently fixed C in pasture plant-soil system under field conditions (en)
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| skos:prefLabel
| - Fate and dynamics of recently fixed C in pasture plant-soil system under field conditions
- Tok a dynamika asimilovaného C v systému rostlina-půda v přirozených podmínkách (cs)
- Fate and dynamics of recently fixed C in pasture plant-soil system under field conditions (en)
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| skos:notation
| - RIV/60076658:12310/07:00007964!RIV08-AV0-12310___
|
| http://linked.open.../vavai/riv/strany
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| http://linked.open...avai/riv/aktivita
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| http://linked.open...avai/riv/aktivity
| - P(KJB601410610), S, Z(MSM6007665801)
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| http://linked.open...iv/cisloPeriodika
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| http://linked.open...vai/riv/dodaniDat
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| http://linked.open...aciTvurceVysledku
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| http://linked.open.../riv/druhVysledku
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| http://linked.open...iv/duvernostUdaju
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| http://linked.open...titaPredkladatele
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| http://linked.open...dnocenehoVysledku
| |
| http://linked.open...ai/riv/idVysledku
| - RIV/60076658:12310/07:00007964
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| http://linked.open...riv/jazykVysledku
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| http://linked.open.../riv/klicovaSlova
| - carbon cycle; carbon allocation; microbial biomass; pulse labelling (en)
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| http://linked.open.../riv/klicoveSlovo
| |
| http://linked.open...odStatuVydavatele
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| http://linked.open...ontrolniKodProRIV
| |
| http://linked.open...i/riv/nazevZdroje
| |
| http://linked.open...in/vavai/riv/obor
| |
| http://linked.open...ichTvurcuVysledku
| |
| http://linked.open...cetTvurcuVysledku
| |
| http://linked.open...vavai/riv/projekt
| |
| http://linked.open...UplatneniVysledku
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| http://linked.open...v/svazekPeriodika
| |
| http://linked.open...iv/tvurceVysledku
| - Kaštovská, Eva
- Šantrůčková, Hana
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| http://linked.open...n/vavai/riv/zamer
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| issn
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| number of pages
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| http://localhost/t...ganizacniJednotka
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