| 摘要: |
| 用以土培技术，研究了钾营养效率不同的４个小麦品种根际速效钾、缓效钾的动态变化与钾效率的关系。结果表明，在不施钾条件下，低效低响型品种京核１号根限速效钾和缓效钾的耗竭程度较大。相反，高效低响型品种太核５０２５、低效高响型品种６１５４的根限速效钾和缓效钾的耗竭程度都较小。而中间类型品种京选偃６的根际钾耗竭程度更小。小麦根际钾的变化与根系分泌Ｈ＾＋能力有一定的关系。 |
| 关键词: 根际 钾动态 钾营养效率 小麦 |
| DOI： |
| 修订日期：1998-04-02 |
| 基金项目:国家自然科学基金重大项目 !(39790 10 0 )，博士后基金资助项目 |
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| Study on Depletion of Potassium in the Rhizosphere Soil of Different Wheat Varieties of K Efficiency |
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| Abstract: |
| The depletion of potassium in the rhizosphere soil of four wheat varieties with different potassium nutrition efficiency was studied in soil culture with 3 compartment pot. The results demonstrated that both of available and non exchangeable K were highly depleted in the rhizosphere soil of Jinghe 1 which has low K efficiency and low responsiveness to K; and low depletion of available and non exchangeable occurred for Taihe 5025, a cultivar with high K efficiency and low responsiveness to K; 6154, a cultivar with low K efficiency and high responsiveness to K, and Jing xuan yan 6, a cultivar with moderate K efficiency and responsiveness to K. The relationship of K depletion in rhizosphere soil of wheat and H excretion from the roots was also discussed. |
| Key words: rhizoshpere,K dynamic change,K nutrition efficiency,wheat |
