| 钾肥对烤烟体内钾素分配及微量元素含量的影响 |
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| 引用本文： | 张新,曹志洪.钾肥对烤烟体内钾素分配及微量元素含量的影响[J].土壤学报,1994,31(1):50-60. |
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| 作者姓名： | 张新 曹志洪 |
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| 作者单位： | 中国科学院南京土壤研究所;中国科学院南京土壤研究所 |
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| 摘 要： | 本文用三种典型的植烟土壤研究了不同的钾肥用量对烟株含量及分配的影响，结果表明，烟叶含钾量随钾肥用量的增加而增加，两者符合二次曲线的关系。充分供钾时，钾在烟株体内的含量顺序为芽＞叶＞茎＞根，烟叶不同部位为下部＞中部＞上部；当烟株缺钾时，上部烟叶含钾量高于中下部。无率在哪种土壤上，钾在烟株中的分配比例顺序为烟叶＞茎＞根＞芽，当中部烟叶含钾量达到２．４％时钾在烟株中的分配趋向一稳定值，即在烟叶、茎、根、
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| 关 键 词： | 钾肥 烤烟 钾素分配 微量元素 |
EFFECTS OF POTASSIUM STATUS OF THREE TOBACCO PLANTING SOlLS ON POTASSlUM NUTRITION AND CONTENTS OF OTHER ELEMENTS IN FLUE-CURED TOBACCO |
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| Zhang Xin and Cao Zhihong.EFFECTS OF POTASSIUM STATUS OF THREE TOBACCO PLANTING SOlLS ON POTASSlUM NUTRITION AND CONTENTS OF OTHER ELEMENTS IN FLUE-CURED TOBACCO[J].Acta Pedologica Sinica,1994,31(1):50-60. |
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| Authors: | Zhang Xin and Cao Zhihong |
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| Institution: | Institute of Soil Science, Academia Sinica, Nanjing, 210008;Institute of Soil Science, Academia Sinica, Nanjing, 210008 |
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| Abstract: | This paper deals with the effects of the rates of potassium fertiliser application rates and the potassium status of three typical tobacco planting soils on the K contents of flue-cured tobacco organs,K distribution,and secondary and trace element contents of cured leaves.The results indicated that K content in cured leaves increased with the potassium rate,which could be fitted by equations.When tobacco was supplied with sufficient potassium fertilizer,the order of K content on plant organs was bud>leaf>stem>root,and on different leaf positions was lower>middle> upper; but in K dificient condition the leaf K content in upper position was higher than that in middle and lower.The percentages of K distribution in tobacco organs were in the sequence Leaf>stem>root>bud.When K content in middle leaf was upper to 2.4% or more,the distribution tended to be balanced and the percentage tended to a constant,being 60%,20%,15% and 5% in leaf,stem,root,and bud,respectively.So,2.4% of K content in middle leaf could be taken as the Critical Value for Balanced Distribution of Potassium under the experimental conditions.The Critical Value gives a new idea to improveing the potassium nutrition of tobacco. |
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| Keywords: | K status K application Elue-cured tobacco Plant K distribution Trace elements |
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