Journal of Nuclear Agricultural Sciences ›› 2019, Vol. 33 ›› Issue (9): 1865-1872.DOI: 10.11869/j.issn.100-8551.2019.09.1865

• Isotope Tracer Technique·Ecology & Environment·Physiology • Previous Articles     Next Articles

Effects of Different Soil Types on Silicon Isotope Fractionation of Rice

XIAO Han1,2, SUN Yan3, ZHOU Jingjie1, MA Qingxu1, XIE Yinan1, WU Lianghuan1,2,*, HU Zhaoping2,*   

  1. 1 Ministry of Education Key Laboratory of Environmental Remediation and Ecosystem H ealth/College of Environmental and Resource Sciences,Zhejiang University, Hangzhou, Zhejiang 310058;
    2 State Key Laboratory of Nutrition Resources Integrated Utilization/Kingenta Ecological Engineering Group Co.,Ltd., Linyi, Shandong 276000;
    3 State Key Laboratory of Eco-hydraulics in Northwest Arid Region of China/Water Conservancy and Hydropower College, Xi'an University of Technology, Xi'an, Shaanxi 710048
  • Received:2018-09-20 Revised:2018-12-04 Online:2019-09-09 Published:2019-07-23

不同类型土壤对水稻硅同位素分馏的影响

肖晗1,2, 孙燕3, 周静杰1, 马庆旭1, 谢懿楠1, 吴良欢1,2,*, 胡兆平2,*   

  1. 1 浙江大学环境与资源学院/教育部环境修复与生态健康重点实验室,浙江 杭州 310058;
    2 金正大生态工程集团股份有限公司/养分资源高效开发与综合利用国家重点实验室,山东 临沂 276000;
    3 西安理工大学水利水电学院/省部共建西北旱区生态水利国家重点实验室培育基地,陕西 西安 710048
  • 通讯作者: *吴良欢,男,教授,主要从事植物营养与养分资源综合管理。E-mail: finm@zju.edu.cn;胡兆平,男,高级工程师,主要从事养分资源利用与新型肥料研发工作。E-mail: huzhaoping@kingenta.com。同为通讯作者。
  • 作者简介:肖晗,女,主要从事植物营养生理与生态研究。E-mail: xiaohan9494@126.com
  • 基金资助:
    国家自然科学基金(31572194)

Abstract: A plot experiment was carried out to explore the effects of different soil types on Si isotope composition and fractionation of rice. Rice (Oryza sativa L. cv. Jia 58) was grown in red soil, black soil and cinnamon soil, respectively. Soil chemical properties, rice dry weight, rice Si content, rice Si isotope composition were determined. The results indicated that different types of soil had a remarkable impact on the rice Si-isotopic fractionation. The Si isotope fractionation factors (αPre-Dsi) of rice grown in red soil, black soil and cinnamon soil were 0.998 8, 0.997 8 and 0.997 5, respectively, illustrating that the extent of Si isotope fractionation of rice planted in cinnamon soil was the strongest, followed by rice in black soil and rice in red soil. Correlation analysis showed that the δ30Si values of rice (bulk and leaves) were significant correlated with the contents of organic matter, available Si, free Fe oxide, free Al oxide and pH values of soils (P<0.01), indicating that rice Si-isotopic signature might be primarily affected by pH values, organic matter content, available Si content of soils and the extent of soil weathering since the contents of free Fe oxide and free Al oxide increase with weathering. The results provide a theoretical basis for using Si isotope tracing technology to explore the model of Si cycle in nature.

Key words: soil types, rice, silicon isotope, isotope fractionation

摘要: 为探明不同类型土壤对水稻硅同位素组成及分馏的影响,本研究以红壤、黑土和褐土作为供试土壤,以水稻品种嘉58作为供试材料进行盆栽试验,测定土壤理化性质,水稻各器官干重、硅含量、硅同位素组成等指标。结果表明,不同类型土壤对水稻硅同位素分馏效应均影响明显,红壤、黑土、褐土栽培的水稻硅同位素分馏系数(αPre-Dsi)分别为0.998 8、0.997 8、0.997 5,其中褐土栽培的水稻体内硅同位素分馏程度最大,黑土次之,红壤最小;相关性分析表明,水稻δ30Si值(整株和叶片)与土壤pH值、有机质、有效硅、游离氧化铁和游离氧化铝含量之间均存在极显著相关性(P<0.01),其中土壤游离氧化铁、游离氧化铝含量随着土壤风化程度的增加均呈升高趋势。由此推断,水稻硅同位素组成可能主要受土壤pH值、有机质、有效硅含量及土壤风化程度的影响。本研究结果为利用硅稳定同位素示踪技术探索自然界的硅循环模式提供了理论依据。

关键词: 土壤类型, 水稻, 硅同位素, 同位素分馏