ABSTRACT Lime application to New Zealand pastures is required to correct inherent soil acidity and also remedy soil acidification caused by plant growth and farming practices. Combining the results of many individual trials carried out under mown pasture showed that the optimum soil pH for plant growth in the top 75 mm for mineral soils is 5.8–6.1 and 5.0 for organic soils. A smaller number of grazing trials showed similar results. Liming affects pasture production through several processes that are described in the text. On mineral soils, 0.7 t lime per hectare was calculated as the requirement to increase soil pH in the top 75 mm by 0.1 units. The requirements for lime can also be determined through modelling economic factors and the rate of soil acidification.

中文翻译：

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石灰对新西兰土壤和牧场影响的研究综述

摘要 新西兰牧场需要使用石灰来纠正固有的土壤酸度，并纠正由植物生长和耕作方法引起的土壤酸化。结合在割下的牧场下进行的许多单独试验的结果表明，矿质土壤顶部 75 毫米植物生长的最佳土壤 pH 值为 5.8-6.1，有机土壤为 5.0。少数放牧试验显示了类似的结果。石灰通过文中描述的几个过程影响牧场生产。在矿质土壤上，每公顷 0.7 吨石灰被计算为将顶部 75 毫米土壤 pH 值提高 0.1 个单位的要求。石灰的需求量也可以通过模拟经济因素和土壤酸化率来确定。