摘要
在生物试验的基础上 ,利用连续流动法 ,模拟植物根系分泌有机酸的种类和数量 ,研究了不同有机酸对矿物钾释放的影响。结果表明 ,有机酸能够明显地促进矿物中钾的释放 ,浓度越高 ,释钾作用越明显 ;此外 ,其释钾能力还与有机酸的种类、矿物类型密切相关。对试验结果进行了随机数学模拟 ,表明所采用的传递函数模型能够较好地仿真矿物钾的释放过程。
Based on the culture experiments,the mechanism of K mobilization from minerals has been studied with flow extraction technique by simulating the types and the concentrations of organic acids that plant roots excretes under P deficiency The results showed that organic acids significantly stimulated K release from minerals,and the release of K increased with the concentration of organic acids Moreover,the mobilizing ability was closely correlated to the type of the organic acids and minerals The release of K from feldspar and muscovite was simulated by a transfer function model The simulated data was correlated with the measured data It indicated that the transfer function model is useful in studying mobilization of structural K in K bearing minerals
出处
《土壤学报》
CAS
CSCD
北大核心
2002年第3期341-350,共10页
Acta Pedologica Sinica
基金
国家重点基础研究发展规划项目 (G1 9990 1 1 70 7)
国家自然科学基金资助项目 ( 395 70 4 1 8)
关键词
有机酸
矿物钾释放
数学模拟
传递函数模型
室内试验
Organic acids,Structural K,K released,Transfer function model,Stochastic simulation
