叶面喷施硒肥对烤烟的影响

通过大田叶面喷施硒肥试验,研究了硒肥对烤烟生长、叶绿素含量、烟叶硒含量等的影响。结果表明：硒肥有促进烟株生长的作用,施用硒肥时间越早,促进作用越大。第5叶的叶绿素a、叶绿素b、叶绿素a＋b、类胡萝卜素含量,喷施硒肥的处理极显著大于对照;第10叶的叶绿素a含量喷施硒肥的处理显著大于对照;第14叶的叶绿素a含量喷施硒肥的处理显著小于对照。喷施硒肥时期越迟,叶片平均硒含量越高。叶面喷施硒肥的利用率为1.41%-3.27%,平均为2.37%。

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 5^th leaf with spraying Se fertilizer were more than that of CK, significantly. The chlorophyll a content of the treated 10^th leaf was more than CK significantly. The chlorophyll a content of the treated 14^th 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%.