| 长期定位施肥对非石灰性潮土K+解吸动力学的影响 |
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| 引用本文： | 崔德杰,刘永辉,隋方功,张玉龙.长期定位施肥对非石灰性潮土K+解吸动力学的影响[J].植物营养与肥料学报,2006,12(2):213-218. |
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| 作者姓名： | 崔德杰 刘永辉 隋方功 张玉龙 |
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| 作者单位： | 1.沈阳农业大学土地与环境学院 辽宁沈阳110061; |
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| 摘 要： | 采用连续液流法研究了长期定位施肥潮土K+解吸的动力学特性。结果表明,1)不同处理的土壤K+解吸的平衡时间和平衡解吸量有很大差异,平衡解吸量的变化与CEC和粘土中高岭石的含量密切相关;2)长期施肥使K+解吸速率产生了差异,解吸速率也与CEC、粘粒含量和高岭石的变化密切相关;3)不同处理在不同的反应阶段其解吸率差异很大,粘粒含量高的处理在反应初期解吸较快;4)平衡前不同时段的解吸速率和解吸率与反应时间lnt有极显著的线性相关,且与土壤粘粒含量密切相关;5)一级动力学方程是描述潮土中K+解吸过程的最优模型,该过程是扩散控制过程。
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| 关 键 词： | 长期施肥 钾解吸 潮土 化学动力学 |
| 文章编号： | 1008-505X(2006)02-0213-06 |
| 修稿时间： | 2004年12月22 |
Effect of long-term fertilization on K + desorption kinetics of noncalcareous fluvo-aquic soil |
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| CUI De-jie,LIU Yong-hui,SUI Fang-gong,ZHANG Yu-long.Effect of long-term fertilization on K + desorption kinetics of noncalcareous fluvo-aquic soil[J].Plant Nutrition and Fertilizer Science,2006,12(2):213-218. |
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| Authors: | CUI De-jie LIU Yong-hui SUI Fang-gong ZHANG Yu-long |
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| Institution: | 1.College of Land and Enviromental Sciences;Shenyang Agricultural University;Shengyang 110061;China; |
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| Abstract: | The characteristics of K~ desorption kinetics on noncalcareous fluvo-aquic soil under long-term fertilization condition were studied using the liquid flow technique.The results indicated that: 1) There were great differentia on K~ equilibrium desorption time and quantity among the different treatment,respectively.K~ equilibrium desorption quantity was closely related with CEC and kaolinite content;2) Long-term fertilization caused a discrepancy on desorbing velocity,which were also related with clay content,CEC and kaolinite content;3) There exist differentia in different reaction phases on K~ desorbing percentage,e.g.whose desorbing percentage rose fast at initial phase,but with high clay content;among different treatments;4) There was a linear relationship between desorption velocity and the reaction time(lnt),and desorption velocity was closely related with soil clay content;5) First-order kinetic equation was the best model for K~ desorption and the K~ desorption was controlled by the diffussion process. |
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| Keywords: | long-term fertilization K~ desorption fluvo-aquic soil kinetics |
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