Effects of Exogenous Selenium on Paddy Rice Growth, Selenium Uptake and Accumulation

• Main Authors: HUANG Tai-qing, JIANG Ze-pu, XING Ying, LIAO Qing, LIANG Pan-xia, LIU Yong-xian
• Format: Article
• Language: zho
• Published: Agro-Environmental Protection Institute, Ministry of Agriculture 2017-08-01
• Series: Journal of Agricultural Resources and Environment
• Subjects: sodium selenite; paddy rice; accumulation; utilization rate
• Online Access: http://www.aed.org.cn/nyzyyhjxb/html/2017/5/20170507.htm
• ISSN: 2095-6819; 2095-6819

Selenium(Se) is an essential micronutrient for humans which mainly comes from food, Se amendment to soil is one of important ways to produce selenium-enriched foods. In this paper, pot experiment had been taken at four exogenous selenite levels(0, 0.2, 0.4 mg Se·kg^-1 soil and 0.6 mg Se·kg^-1 soil) to investigate the effects of Se amendment to soil on paddy rice growth, Se uptake and accumulation. With Se adding levels to soil ranged from 0.2 to 0.6 mg Se·kg^-1 soil, there were no significant effect on rice growth, but the total Se concentrations in paddy rice fractions increased significantly. The total Se concentrations in paddy rice fractions were in the following order:root > straw > unpolished rice > polished rice > husk, but the total Se accumulations in paddy rice fractions were in the following order:straw > unpolished rice > polished rice > root > husk. When paddy rice grew on the natural soil, Se relatively more enriched in roots, while the treatment amended with selenite, rice absorption of Se transported to the aboveground parts more efficiently, even more easily accumulated in unpolished and polished rice. The utilization of paddy rice, aboveground biomass and grain accumulated added-selenium were 2.87%~3.75%, 2.60%~3.45% and 0.94%~1.32% respectively.