广西鹿寨水稻及其种植土壤中硒含量分布特征分析

文章编号：2095-1191（2016）11-1856-05

Abstract：【Objective】The present study was conducted to study distribution characteristics of rice and rhizosphere soil in Luzhai，Guangxi，in order to provide a theoretical basis for industrialized，large-scale and scientific production of selenium-eiched rice in Guangxi. 【Method】Twenty-eight sets of representative rice plants and corresponding rhizosphere soil samples were collected from Luzhai，Guangxi，and the selenium content in different parts of rice plants was determined by hydride atomic fluorescence spectrometry，compared with selenium content of corresponding rhizosphere soil，so as to investigate ability of rice to eich selenium during growth process. 【Result】Results showed that，enough-selenium rate，selenium-eiched rate and selenium poisoning rate of 28 rice rhizosphere soil samples accounted for 3.57%，92.86% and 3.57% of total samples. Twenty-six of twenty-eight seed samples were up to standard of selenium eichment，selenium-eiched rate was 92.86%，but two of which were lower than standard，accounting for 7.14%. Distributions of selenium contents in different parts of rice plant and rhizosphere soil were ranked as follows：rhizosphere soil>root hair>cauline leaf>seed. Selenium content of corresponding rhizosphere soil was extremely significantly positively correlated with selenium content of seeds，cauline leaf and root hair，respectively（P<0.01），however，this correlation was attenuated with the increase of distance between rhizosphere soil and each of root，cauline leaf and seed. 【Conclusion】Paddy soil of Luzhai，Guangxi is rich in selenium，with an average selenium content of 1.002 mg/kg，which is much higher than national average（0.29 mg/kg），92.9% of total rice reach up to national standard of selenium-eiched rice，therefore，Luzhai of Guangxi has natural condition for production of selenium-eiched rice.

Key words： selenium； rice； rhizosphere soil； content； distribution characteristics； Luzhai， Guangxi

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