欢迎访问《中国农学通报》，
中国农学通报

中国农学通报 ›› 2015, Vol. 31 ›› Issue (10): 221-225.doi: 10.11924/j.issn.1000-6850.2014-2382

• 资源 环境 生态 土壤 气象 • 上一篇    下一篇

冬枣果园土壤非交换态钾的释放动力学

王清华1,杜振宇1,2,马丙尧1,刘方春1,马海林1   

  1. (1山东省林业科学研究院,济南 250014；2土壤与农业可持续发展国家重点实验室/中国科学院南京土壤研究所,南京 210008）
  • 收稿日期:2014-08-31 修回日期:2015-03-06 接受日期:2014-12-03 出版日期:2015-05-05 发布日期:2015-05-05
  • 通讯作者: 杜振宇
  • 基金资助:
    土壤与农业可持续发展国家重点实验室开放基金(0812201214)；山东省自然科学基金(ZR2012CM026)。

Release Kinetics of Nonexchangeable Potassium in an Orchard Soil of Winter Jujube

Wang Qinghua1, Du Zhenyu1,2, Ma Bingyao1, Liu Fangchun1, Ma Hailin1   

  1. (1Shandong Academy of Forestry Science, Jinan 250014;2State Key Laboratory of Soil and Sustainable Agriculture/Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008)
  • Received:2014-08-31 Revised:2015-03-06 Accepted:2014-12-03 Online:2015-05-05 Published:2015-05-05

摘要： 为了研究长期施肥条件下冬枣果园土壤非交换态钾的释放特征，以CaCl2和柠檬酸溶液为浸提剂，采用连续提取的方法对枣园土壤的非交换态钾释放动力学进行研究。结果表明，枣园土壤非交换态钾在释放过程中表现出快速释放和缓慢释放2个连续的阶段。快速释放阶段(<188 h)的累积释放量占到总释放量的53.6%~59.2%，而在缓慢释放阶段(188~1244 h)的释放量不及总量的一半。在相同时间内，使用柠檬酸溶液浸提时，非交换态钾的释放量明显高于使用CaCl2溶液时的释放量。相比之下，冬枣果园土壤非交换态钾的释放量明显高于对照土壤。在5种动力学方程中，幂函数方程是描述冬枣果园土壤非交换态钾释放的最优模型。

关键词: 动态变化., 动态变化.

Abstract: In order to explore release characteristics of nonexchangeable potassium (K) in winter jujube orchard (WJO) soil, the release kinetics of nonexchangeable potassium by CaCl2 and citric solution were studied by using a successive extraction method. The results showed that the soil nonexchangeable K release was comprised of two processes: rapid and slow ones. In the rapid release process (<188 h), accumulative K release amount occupied 53.6%-59.2% of the total amount, but only less than 50% in slow release process (188-1244 h). The K release amount in citric solution was higher than that in CaCl2 solution at the same time. By comparison, the K release amount of WJO was higher compared with the control. The power function equation was the best model for describing nonexchangeable K release in WJO soil.