Study about the effect of different selenium source absorbed by sesame

The sesame variety Yuzhi no.10 was used to apply different sources of selenium, including ore powder riched with selenium, fertilizer contenting selenium, and liquid Na_2Seo_3. The result showed that : (1) Different kinds of selenium source can enhance the content of selenium in sesame plant, with the content of selenium from 0.216mg/kg to 0.614mg/kg, whereas the content of ck was only 0.108mg/kg, indicating an increase of (120.65%)~456.11% with an average of 277.5%. (2) Different parts of sesame plant showed different ability on selenium absorption, with seedslequmenleafroot, indicating the reproductive organs are better on absorbing selenium than vegetative organs. (3) The content of selenium in the old leaves was higher than in the new leaves, suggesting that the selenium content is accumulating during growth. (4) The selenium contents in seeds were (1.185mg/kg,) 0.6545mg/kg and 0.4390mg/kg, using Na_2Seo_3 liquid, selenium fertilizer and ore powder riched with selenium respectively. Compared with the ck, which contained 0.1640mg/kg selenium in seeds, the selenium content increased 167.7%~582.0% (averaged 349.5%). (5) The most effective concentration of liquid Na_2Seo_3 is from 50 to 100mg/kg. When liquid Na_2Seo_3 content concentration is over 350mg/kg, sesame plants will be damaged seriously, and the selenium content in seeds will be decreased.