Opposing effects of nitrogen and water addition on soil bacterial and fungal communities in the Inner Mongolia steppe: A field experiment
| Autor: | Guang ying Bai, Yang Sun, Weibin Ruan, Shan Lin, Olga Kostenko, T. Martijn Bezemer, Hai-Kun Ma, Xiang Zhu, Nian xi Zhao |
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| Přispěvatelé: | Terrestrial Ecology (TE) |
| Jazyk: | angličtina |
| Rok vydání: | 2016 |
| Předmět: |
0106 biological sciences
Irrigation Steppe Soil biology Soil Science 010603 evolutionary biology 01 natural sciences complex mixtures Grassland Soil pH Ecosystem Precipitation Laboratorium voor Nematologie geography geography.geographical_feature_category Ecology 04 agricultural and veterinary sciences PE&RC Agricultural and Biological Sciences (miscellaneous) Agronomy international Fertilization 040103 agronomy & agriculture PLFA Soil microbial community 0401 agriculture forestry and fisheries Environmental science Terrestrial ecosystem Laboratory of Nematology |
| Zdroj: | Applied Soil Ecology, 108, 128-135 Applied Soil Ecology, 108, 128-135. Elsevier B.V. Applied Soil Ecology 108 (2016) |
| ISSN: | 0929-1393 |
| Popis: | Grasslands are important ecosystems and make up 40% of the terrestrial ecosystems worldwide. The Inner Mongolia steppe is the main grassland region of China, and nitrogen (N) and water availability are two important factors that limit the productivity of these grasslands. We tested how N and water addition influence the composition of the microbial community in the soil using PLFA, and soil physical and chemical properties in two semiarid grassland sites in Inner Mongolia during two consecutive years. In both sites, a split-plot design was employed with two water treatments (natural precipitation, stimulated wet year precipitation) and three N treatments (0 kg N ha⁻¹, 25 kg N ha⁻¹, 50 kg N ha⁻¹). Water addition greatly increased soil fungi and decreased bacteria while N had opposite effects. Water addition resulted in a significant increase in soil pH and electric conductivity. N addition did not lead to consistent changes in soil characteristics. Multivariate analysis showed that PLFA composition varied between all treatments but was mainly influenced by water addition. This study provides insight into how climatic changes such as alternations in rainfall and N deposition shape the soil microbial communities in Inner Mongolia steppes. |
| Databáze: | OpenAIRE |
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