| Behaviour of Potassium and Trace Elements in Rhizosphere of Flue-Cured Tobacco (Nicotiana Tabacum L.) |
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| 作者姓名： | HU GUO-SONG CAO ZHI-HONG ZHOU XIU-RU LI ZHONG-LIN ZHANG XIN |
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| 作者单位： | [1]InstituteofSoilScience,AcademiaSinica,P.O.Box821,Nanjing210008（China） [2]InstituteofSoilScience,Academia |
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| 基金项目： | Project supported by the National Natural Science Foundation of China;China National Tobacco Corporation. |
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| 摘 要： | The study on the behaviour of potassium,phosphate and trace elements,Fe,Mn,Cu and Zn,in the rhizosphere of different varieties of flue-cured tobacco (Nicotiana tabacum L.)with high and low potassium application rate with rhizobag technique showed that soil available K,soil available P,and slow available K was in depletion status,whereas DTPA extractable Fe,Mn,Zn and Cu accumulated obviously in rhizosphere.The depletion and accumulation rates of mineral nutrients differed in degree with K application rate,soil type,and tobacco variety.The content of available K in both rhizosphere and bulk soil and K concentration in tobacco leaf increased significantly,and the available P in rhizosphere dropped with more K application.The DTPA-Fe content of red soil much lower in pH was higher than that of calcareous soil in bulk soil.But the DTPA-Fe content of calcareous soil was much higher than that of red soil in rhizosphere,which was considered perhaps to be mainly related to releasing of Fe phytosiderophore.Nitrate coule increase depletion of a vailable K in rhizosphere and also soil pH in comparision with ammonium.
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| 关 键 词： | 磷 无机氮 烟草 根际 示踪元素 铁活性 |
Behaviour of Potassium and Trace Elements in Rhizosphere of Flue-Cured Tobacco (Nicotiana Tabacum L.) |
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| HU GUO-SONG,CAO ZHI-HONG,ZHOU XIU-RU,LI ZHONG-LIN,ZHANG XIN.Behaviour of Potassium and Trace Elements in Rhizosphere of Flue-Cured Tobacco (Nicotiana Tabacum L.)[J].Pedosphere,1993,3(3):207-220. |
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| Authors: | HU GUO-SONG CAO ZHI-HONG ZHOU XIU-RU LI ZHONG-LIN and ZHANG XIN |
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| Institution: | Institute of Soil Science, Academia Sinica, P. 0. Box821, Nanjng 210008;Institute of Soil Science, Academia Sinica, P. 0. Box821, Nanjng 210008;Institute of Soil Science, Academia Sinica, P. 0. Box821, Nanjng 210008;Institute of Soil Science, Academia Sinica, P. 0. Box821, Nanjng 210008;Institute of Soil Science, Academia Sinica, P. 0. Box821, Nanjng 210008 |
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| Abstract: | The study on the behaviour of potassium,phosphate and trace elements,Fe,Mn,Cu and Zn,in the rhizosphere of different varieties of flue-cured tobacco (Nicotiana tabacum L.)with high and low potassium application rate with rhizobag technique showed that soil available K,soil available P,and slow available K was in depletion status,whereas DTPA extractable Fe,Mn,Zn and Cu accumulated obviously in rhizosphere.The depletion and accumulation rates of mineral nutrients differed in degree with K application rate,soil type,and tobacco variety.The content of available K in both rhizosphere and bulk soil and K concentration in tobacco leaf increased significantly,and the available P in rhizosphere dropped with more K application.The DTPA-Fe content of red soil much lower in pH was higher than that of calcareous soil in bulk soil.But the DTPA-Fe content of calcareous soil was much higher than that of red soil in rhizosphere,which was considered perhaps to be mainly related to releasing of Fe phytosiderophore.Nitrate coule increase depletion of a vailable K in rhizosphere and also soil pH in comparision with ammonium. |
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