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DOI | 10.1080/00380768.2018.1534217 |
Immediate and subsequent effects of drying and rewetting on microbial biomass in a paddy soil | |
Sawada, Kozue1; Funakawa, Shinya2; Kosaki, Takashi3 | |
发表日期 | 2019 |
ISSN | 0038-0768 |
EISSN | 1747-0765 |
卷号 | 65期号:1页码:28-35 |
英文摘要 | Many surface soils in Japan may experience more frequent and intense drying-rewetting (DRW) events due to future climate changes. Such DRW events negatively and positively affect microbial biomass carbon (MBC) through microbial stress and substrate supply mechanisms, respectively. To assess the MBC immediately after DRW and during the incubation with repeated DRW cycles, two laboratory experiments were conducted for a paddy soil. In the first experiment, we exposed the soil to different drying treatments and examined the MBC and hourly respiration rates immediately after the rewetting to evaluate the microbial stress. In the second experiment, we compared microbial growth rates during the incubation of the partially sterilized soil with a continuously moist condition and repeated DRW cycles to evaluate the contribution of the substrate supply from non-biomass soil organic C on MBC. First, all drying treatments caused a reduction in MBC immediately after the rewetting, and higher drying intensities induced higher reduction rates in MBC. A reduction of more than 20% in MBC induced the C-saturated conditions for surviving microbes because sufficient concentrations of labile substrate C were released from the dead MBC. Second, repeated DRW cycles caused increases in the microbial growth rates because substrate C was supplied from non-biomass organic C. In conclusion, MBC decreased immediately after DRW due to microbial stress, whereas MBC increased during repeated DRW cycles due to substrate C supplied from non-biomass organic C. |
WOS研究方向 | Plant Sciences ; Environmental Sciences & Ecology ; Agriculture |
来源期刊 | SOIL SCIENCE AND PLANT NUTRITION
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文献类型 | 期刊论文 |
条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/91900 |
作者单位 | 1.Tokyo Univ Agr & Technol, Inst Symbiot Sci & Technol, 2-24-16 Nakacho, Koganei, Tokyo 1848588, Japan; 2.Kyoto Univ, Grad Sch Agr, Kyoto, Japan; 3.Aichi Univ, Fac Int Commun, Nagoya, Aichi, Japan |
推荐引用方式 GB/T 7714 | Sawada, Kozue,Funakawa, Shinya,Kosaki, Takashi. Immediate and subsequent effects of drying and rewetting on microbial biomass in a paddy soil[J],2019,65(1):28-35. |
APA | Sawada, Kozue,Funakawa, Shinya,&Kosaki, Takashi.(2019).Immediate and subsequent effects of drying and rewetting on microbial biomass in a paddy soil.SOIL SCIENCE AND PLANT NUTRITION,65(1),28-35. |
MLA | Sawada, Kozue,et al."Immediate and subsequent effects of drying and rewetting on microbial biomass in a paddy soil".SOIL SCIENCE AND PLANT NUTRITION 65.1(2019):28-35. |
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