Effect of Different Selenium Fertilizer Application Methods and Application Periods on Selenium Content and Yield of Rice

• Main Authors: CHI Feng-qin, KUANG En-jun, ZHANG Jiu-ming, SU Qing-rui, WEI Dan
• Format: Article
• Language: zho
• Published: Agro-Environmental Protection Institute, Ministry of Agriculture 2014-12-01
• Series: Journal of Agricultural Resources and Environment
• Subjects: selenium; rice; growth period; yield
• Online Access: http://www.aed.org.cn/nyzyyhjxb/html/2014/6/20140613.htm

Under field plot experiment condition, the different application methods and application periods of selenium(Se)fertilizer were explored to make sure the absorption and accumulation of Se in plants and grains of rice. The results showed there were significant differences in the early and exuberant periods of rice for Se absorption and accumulation. Compared with the control, three kinds of application methods could significantly improve Se value of rice. From the effect of Se enrichment, the content of Se was in the range of 0.163～0.207 mg·kg-1 which increased by 5.8～7.6 times, within the safe range. From the way of Se enrichment, the order of better effect was: spraying Se at flowering stage treatment>application Se in soil>spraying Se at breeding period>CK. From the foliar application period of Se, the order of Se enrichment effect was spraying Se at flowering stage>breeding period>grain filling period>full heading period>CK. Exogenous inorganic and organic Se fertilizer could significantly promote the accumulation of Se in rice. Foliar spray in rice seedling and flowering stage could increase the Se containing of rice grain but not reduce the yield of rice.