A kinetic parameter for evaluation of the reactivity of agricultural lime
A kinetic parameter for evaluation of the reactivity of agricultural lime
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DOI：
10.1080/00103629309368788
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发表时间：
1993
影响因子：
1.8
通讯作者：
H. V. D. Watt;G. Croft
中科院分区：
文献类型：
--
作者：
H. V. D. Watt;G. Croft
摘要：“反应性”；在恶劣条件下，通过化学分析，包括中和/溶解，不能充分描述ag石灰在土壤中的溶解速率。与环境土壤pH值下的溶解速率有关的方法应提供有关ag石灰“反应性”的重要信息。我们开发了一种恒定pH滴定方法，使用自动滴定装置，以实现这一目标。在pH为4.0、5.0和5.5的情况下，通过滴定比较了15种成分和反应性差异很大的凝胶，并记录了中和率。时间，以分钟为单位，其中50%的ag石灰的中和能力（HCl值）已被中和，被认为是一个有用的动力学参数，并指定为t1 / 2。测试的凝胶有很大不同的T½值，即使凝胶在粒度和化学和物理性质方面是相似的。T½值与酸树脂悬浮法获得的质量参数显著相关（负相关）。
Abstract The “reactivity”; and dissolution rate of an aglime in soil is not adequately described by chemical analysis involving neutralization/dissolution under harsh conditions. A method related to dissolution rate at ambient soil pH values should provide important information on aglime “reactivity”;. We developed a constant pH titration method, using an automated titration assembly, to achieve this aim. Fifteen aglimes, differing widely in composition and reactivity, were compared by titration at pH 4.0, 5.0 and 5.5 and noting the neutralization rate. The time, in minutes, at which 50% of an aglime's neutralizing ability (HCl‐value) had been neutralized, was considered to be a useful kinetic parameter and designated T½. The aglimes tested had widely different T½ values even when the aglimes were comparable with regard to particle size and chemical and physical properties. The T½ values were significantely correlated (negatively) with a quality parameter obtained by an acid resin suspension method.