Abstract: By field experiment，chemical analysis and biological statistics， study on the effect of Se fertilization and absorption and distribution of Se on the basis of spraying and in seminal fertilization for 2 years in potato． The results are as follows: The change of Se-content was 0． 037-0． 084 mg /kg in growth period of potato，and its peak emerged at 65 days after emergence. The order of average concentration in leaves， stems and tubers at different orgens in growth period was 0． 137，0 ． 063，0 ． 031 mg /kg， respectively. Tuber ranged 0． 026-0． 038 mg /kg. Se-content and accumulation in whole plant and tuber were culculated by a cubic curve and logistic curve， respectively. The fastest absorption velocity with whole plant and tuber appeared at 40 days and 71days after emergence， respectively． Along with the center of growth move from stem and leaves to tuber，Se-content of stem and leaves is 82 percent， tuber is 18 percent at the tuber initiation stage. In harvest stage，Se-content of stem and leave is 40 percent， the translocation rate of Se is 60 percent． Spraying to leaves with 15 g /ha or applying to soil with 68 g /ha in whole plant at all stages can be improved 5． 3 and 2． 5 times of Se-content，and tuber can be improved 0． 104 mg /kg and 0． 093 mg /kg， respectively in harvest stage，which was up to or near Se-enrich． In harvest stage， spraying Se equal to 8． 7 times than Se in seminal fertilization．

Key words: Potato, Selenium, Absorption and Distribution, Se fertilization, Absorption rate

CLC Number: 

• S532.01