摘要
根系泌氧(radial oxygen loss,ROL)是水稻在长期淹水状况下从土壤中有效获得养分的重要机制之一,对水稻的生长发育具有重要意义。近年来,研究人员发现并阐明了水稻根系泌氧对于包括厌氧菌、好氧菌及兼性厌氧菌在内的土壤微生物种群数量和种群多样性的影响;大量研究也报道了根系泌氧能促进水稻根际土壤中有机氮的矿化。土壤有机氮矿化与土壤中的微生物区系密切相关,二者之间的相互作用进一步促进水稻对氮素营养的吸收与代谢。本文就水稻根系泌氧对土壤微生物区系和有机质矿化作用的影响进行综述,系统介绍了水稻根系泌氧可能的机理、对微生物区系的影响以及对有机氮矿化的促进作用,提出了目前水稻根系泌氧研究所面临的问题,并展望了水稻根系泌氧的研究前景。
Radial oxygen loss （ROL） is one of the most important mechanisms for rice to obtain nutrients from soil when living in waterlogging environment, being quite important for rice growth and development. Recently, ROL has been demonstrated to significantly affect the population and diversity of soil microbes, including anaerobic bacteria, aerobic bacteria and facuhative anaero- bic bacteria. Meanwhile, numerous studies have reported that rice ROL plays roles in the miner- alization process of soil organic nitrogen. However, the internal interactions between the minerali- zation of soil organic nitrogen and soil microbial dynamics at rice rlfizosphere regulated by ROL have been largely ignored. In this review, we summarized the ROL traits of rice root, as well as the effects of ROL on soil microbes and organic nitrogen mineralization. We then discussed the synergistic effects of soil organic nitrogen and soil microbial dynamics on rice nitrogen absorption and metabolism. Finally, we outlined the problems and the prospects of rice ROL for further research.
出处
《生态学杂志》
CAS
CSCD
北大核心
2016年第12期3413-3420,共8页
Chinese Journal of Ecology
基金
国家自然科学基金项目(31570491)
土壤与农业可持续发展国家重点实验室开放项目(Y412201435)资助
关键词
水稻
根系泌氧
微生物区系
有机氮
矿化作用
rice
root radial oxygen loss
soil microflora
organic nitrogen
mineralization
