不同臭氧浓度对水培烤烟吸收^(32)P的影响

PHOSPHATE ABSORPTION AND DISTRIBUTION IN FLUE-CURED TOBACCO UNDER DIFFERENT OZONE CONSISTENCY BY USING ^(32)P

应用3 2 P研究了不同臭氧浓度对水培烤烟吸收磷素营养的影响。结果表明 :在水培法中低浓度臭氧使根对磷素吸收量所占全植株的百分率随培植时间而减少 ,而茎则随培植时间而增加 ;高浓度臭氧则在整个培植期间根、茎的吸收变化不大。两种培植方法磷素在叶中的分布情况都是 :下叶 >中叶 >上叶。烟株各部分的吸收情况 ,根 >茎 >下叶 >中叶 >上叶 ,且两种培植方法对磷的吸收量都与培植时间呈显著正相关 。

The absorption and distribution of phosphate in flue-cured tobacco under different ozone consistencies was studied by using 32P. The results showed that the percentage of root of whole tobacco plant assimilating 32P reduced as growing, but in stem it increased as growing in the sand culture. Root and stem of flue-cured tobacco assimilating 32P varied little in the whole growing period in the solution culture. Distribution situation in leaf with two consistencies was in the order of lower leaf>cutters leaf>upper leaf, and the ratio of radioactivity showed root>stem>lower leaf>cutters leaf>upper leaf.However, flue-cured tobacco assimilating phosphate in the two consistencies showed significantly positive correlation with length of growth period . Assimilating phosphate in the solution culture was more and faster than in the low ozone consistency culture.