| Autor: |
B. L. Williams, Clare E. Alexander |
| Rok vydání: |
1991 |
| Předmět: |
|
| Zdroj: |
Soil Biology and Biochemistry. 23:71-75 |
| ISSN: |
0038-0717 |
| DOI: |
10.1016/0038-0717(91)90164-f |
| Popis: |
Columns packed with loose needle litters from pure Sitka spruce (SS), Scots pine (SP) and a 1:1 mixture (SS & SP) were leached for 21 weeks with distilled water. At the start the SP litter had smaller microbial biomass C and N contents, but a significantly (P < 0.001) greater content of fluorescein diacetate active hyphae than that of SS. Enchytraeid worms, present on SS, but not SP litter, proliferated during the experiment and numbers were significantly (P < 0.01) greater in SS & SP than SS or SP. Carbon dioxide was evolved at a significantly greater rate from SS than SP. whereas SS & SP had the same respiratory activity as pure SS. Mineral N accounted for 28. 24 and 8% of the total-N in SS. SS & SP and SP. respectively. Approximately 50% of the mincral-N in SS and SS & SP was NO1− but in SP only 4% was present as NO1− The increased C and N mineralizing activities in SS & SP compared with the calculated values for a 1:1 mixture of SS and SP were attributed to an interaction between enchytracid worms in SS and a dominantly fungal biomass in SP litter. This effect was observed on mixing litters from two separate sites and it remains to be shown that pine and spruce litter from the same site interact in the same way. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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