氯在烤烟中的分布研究

应用＾３６Ｃｌ研究氯在烤烟器官中的分布，结果表明，各器官含氯量是：叶〉茎〉根，叶含氯量分别比根，茎高 ３２．００％和２８．００％，根、茎、叶吸收总氯量分别占全株总氯量的９．０２％，１９．１２％和７１．８０％，随着施氯量的增加，烤烟叶含氯量增加，施５．０ｇ／株氯，叶含氯量分别比对照（未施氯）和施１．０ｇ／株，３．０ｇ／株氯高２４．３０％，１２．２０％和８．５４％，烤烟氯利用率随施氯量的增加而下降，施

A STUDY OF THE DISTRIBUTION OF CHLORINE IN FLUE CURED TOBACCO PLANTS

In an isotope ( 36 Cl) tracing study of the distribution of Cl in flue cured tobacco plants, the leaf was found to contain 32.00% and 28.00%, respectively, more Cl than the root and the stem, absorbed Cl in the root, the stem and the leaf accounting for 9.02%,19.12% and 71.80% of the total Cl uptake by the plant, respectively. Cl content in the leaf increased with Cl rate. Compared with the rates of 0 (control), 1.0 and 3.0 g Cl/plant, the treatment of 5.0 g Cl/plant had 24.30%,12.20% and 8.54% higher Cl in its plant leaf. Cl utilization rate by the plant decreased with increase in Cl rate. Compared with the treatments of 1.0 and 3.0 g Cl/plant, the Cl utilization rate of the treatment of 5.0 g Cl/plant dropped by 68.31% and 32.10%, respectively. The dry weight of tobacco leaves increased with Cl rate up to 3.0 g/plant, which had a 39.81% and 32.92% higher leaf Cl than the control. However, further increase in Cl rate decreased leaf dry weight, the treatment of 5.0 g Cl/plant had 19.55% less Cl than the treatment of 3.0 g Cl/plant.