PREDICTING THE LIME REQUIREMENT OF SOILS UNDER PERMANENT GRASSLAND AND ARABLE CROPS
PREDICTING THE LIME REQUIREMENT OF SOILS UNDER PERMANENT GRASSLAND AND ARABLE CROPS
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DOI：
10.1111/j.1475-2743.1989.tb00760.x
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发表时间：
1989-06-01
影响因子：
3.8
通讯作者：
JOHNSTON, AE
中科院分区：
文献类型：
--
作者：
GOULDING, KWT;MCGRATH, SP;JOHNSTON, AE
为 1856 年开始的洛桑实验站的公园草实验和 1962 年开始的洛桑和沃本农场的长期石灰实验绘制了土壤 pH 值与时间的关系图。这些结果表明，施用石灰的影响程度和持续时间随土壤类型、初始 pH 值、肥料氮施用和作物生长而变化。将每种情况的简单方程联系起来，形成一个经验模型，利用土壤类型、作物以及初始和目标 pH 值的适当输入数据，预测达到该 pH 值所需的石灰量。模型预测与 Woodruff 型缓冲方法的估计结果相比较。该模型为覆盖整个英国的更全面的石灰需求模型奠定了坚实的基础。
Graphs of soil pH against time were plotted for the Park Grass Experiment at Rothamsted Experimental Station, begun in 1856, and the Long-term Liming Experiments at Rothamsted and Woburn farms, begun in 1962. These showed that the magnitude and duration of the effect of lime applications varied with soil type, initial pH, fertilizer nitrogen application, and the crop grown. Simple equations for each situation were linked to form an empirical model which, with appropriate input data for soil type, crop, and initial and target pH, predicted the lime needed to reach that pH. Model predictions compared well with estimates from a Woodruff-type buffer method. The model forms a sound basis for a more comprehensive lime requirement model covering the whole of the United Kingdom.