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稻田土壤氧化还原电位的交替变化和土壤组分的特殊性决定了硒在稻田环境中的循环转化机制明显有别于旱地土壤,并且影响到土壤硒的有效性及水稻对硒的吸收与积累.深入研究稻田土壤硒的循环转化及水稻硒营养吸收对实现土壤无机硒向有机硒的转化具有重要意义.本文对稻田土壤硒的循环机制及形态转化、水稻体内硒的代谢机制及吸收积累特性进行综述,分析硒在土壤-水稻系统中转化及向水稻体内迁移的研究现状与发展趋势,为土壤硒有效性研究及培育富硒营养稻米提供参考.
The alternation of soil redox potential and the particularity of soil components in paddy soil determine that the cycling mechanism of selenium in paddy field is obviously different from that in dry land and affects the availability of selenium and the absorption and accumulation of selenium in rice. It is of great significance to study the cycling and transformation of selenium and the absorption of selenium in rice so as to realize the conversion of inorganic selenium into organic selenium.In this paper, the mechanism of selenium cycling and its transformation in paddy soils, the mechanism of selenium metabolism and its accumulation in rice This review summarizes the research status and development trend of selenium transformation in soil-rice system and its migration into rice so as to provide references for the study on the selenium effectiveness of soil and the cultivation of selenium-enriched nutrition rice.