Effects of spraying Se fertilizer to leaves on flue-cured tobacco

Effects of selenium(Se) fertilizer on Flue-cured tobacco growth,chlorophyll and Se content were studied by spraying Se fertilizer on tobacco leaves surface in fields.The results indicated that Se fertilizer had a promoting effect on the growth of tobacco plant,and this function was higher with the earlier time of spraying.The chlorophyll a,chlorophyll b,chlorophyll a+b and carotenoid contents of the 5th leaf with spraying Se fertilizer were more than that of CK, significantly..The chlorophyll a content of the treated 10th leaf was more than CK significantly.The chlorophyll a content of the treated 14th leaf was less than CK significantly.The average Se content of leaves was higher with the later time of spraying.The utilization ratio of Se fertilizer was 1.41%-3.27% and the average ratio was 2.37%.