Effects of repeated fertilization and liming on soil microbial biomass in Betula maximowicziana Regel and Abies sachalinensis Fr. Schmidt stands in Japan
| Autor: | Eriko Ito, Shuhei Aizawa, Hitomi Furusawa, Junko Nagakura |
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| Rok vydání: | 2018 |
| Předmět: |
0106 biological sciences
Abies sachalinensis Ecology biology 010604 marine biology & hydrobiology Amendment food and beverages Biomass Management Monitoring Policy and Law engineering.material biology.organism_classification complex mixtures 010603 evolutionary biology 01 natural sciences Plant ecology Human fertilization Agronomy Soil pH Soil water engineering Environmental science Nature and Landscape Conservation Lime |
| Zdroj: | Landscape and Ecological Engineering. 15:101-111 |
| ISSN: | 1860-188X 1860-1871 |
| Popis: | Few long-term fertilization experiments have been performed in forests, even though the effects of nitrogen (N) addition on soil microbial biomass are a cause for concern. Our objective was to examine the effects of repeated fertilization for 36 years on soil microbial biomass in two forest stands. We measured soil chemical properties and microbial biomass carbon (C) and N in soils in fertilized and non-fertilized plots in a birch stand (Betula maximowicziana Regel) and a fir stand (Abies sachalinensis Fr. Schmidt). We also performed lime amendments and a 21-day laboratory incubation, and measured microbial biomass to clarify the effects of acidification due to fertilization. Soil pH was significantly lower in fertilized plots in both stands, and soil microbial biomass C and N were lower (significantly so in the fir stand) in the fertilized plots after 36 years of repeated fertilization. In the laboratory incubation, lime amendment did not significantly affect the microbial biomass C, N, or C:N ratio, despite an increase of about 1 unit in soil pH. Our results therefore indicate that factors other than soil pH also have important effects on soil microbial biomass in repeatedly fertilized forest stands. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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