应用32P研究烤烟对磷素营养的吸收和分布规律,所施用的NaH232PO4放射性活度为1.48108Bq。研究结果表明:在砂培法培养的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,在水培法中:在整个培植期间根茎的吸收变化不大,两种培植方法在叶中的分布情况都是:下叶>中叶>上叶。从比活度看,烟株各部分的吸收情况,根>茎>下叶>中叶>上叶,并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,但水培比砂培吸收量多。 The application of 32P to study the absorption and distribution of phosphorus nutrition in flue-cured tobacco was studied. The radioactivity of NaH232PO4 was 1.48108Bq. The results showed that the percentage of root-to-phosphorus uptake of the whole plant in sand culture decreased with planting time, but the stem increased with planting time. In hydroponics, the rhizome absorption during the whole planting period Little change, the two cultivation methods in the leaf distribution are: lower leaf> middle leaf> upper leaf. From the specific activity, the absorption of various parts of the tobacco plants, roots> stem> lower leaves> middle leaves> upper leaves, and the two methods of phosphorus uptake and cultivation time were significantly positive correlation, but the water than the sand Absorption capacity and more.