论文部分内容阅读
应用８６Ｒｂ研究不同施钾量的烤烟中钾的分布规律，研究结果表明：施入钾量多，烤烟的叶、茎、根、芽中吸收的钾量多；生长前期（团棵期）烤烟各器官中含钾的百分率顺序为芽＞叶＞茎＞根；生长后期（生长旺期）烤烟各器官含钾总量顺序为叶＞茎＞根．＿在一定施钾范围内，施入钾量多，烤烟吸收肥料和土壤中钾量多，但施钾量多，烤烟对钾肥利用率降低．＿烤烟生长前期钾素主要来自肥料中的钾，占烤烟植株吸收总量的６８．３％；烤烟生长后期吸收钾素主要来自土壤，占烟株吸收钾总量的６５．７％．
Application of 86Rb to study the distribution of potassium in flue-cured tobacco with different K application rates showed that the amount of potassium absorbed in the leaves, stems, roots and shoots of flue- The order of the percentage of potassium in organs was bud> leaf> stem> root. The total potassium content in different organs of flue-cured tobacco at the late growing stage was leaf> stem> root. In a certain range of potassium application, the amount of applied potassium, flue-cured tobacco to absorb more fertilizer and soil potassium, but more potassium, flue-cured tobacco on potassium utilization decreased. _The early period of flue-cured tobacco mainly comes from the potassium in fertilizer, accounting for 68.3% of the total amount of tobacco plants. The late period of flue-cured tobacco’s absorption mainly comes from soil, accounting for 65.7% of the total amount of potassium absorbed by tobacco plants.