Holland J E, White P J, Thauvin J-N, Jordan-Meille L, Haefele S M, Thomas C L, Goulding K W T, McGrath S P
1 Rhynd Farm Cottages, Leuchars, St Andrews, KY16 0DR UK.
James Hutton Institute, Dundee, DD2 5DA UK.
Nutr Cycl Agroecosyst. 2021;120(2):131-144. doi: 10.1007/s10705-020-10117-2. Epub 2021 Apr 25.
Liming has widespread and significant impacts on soil processes and crop responses. The aim of this study was to describe the relationships between exchangeable cation concentrations in soil and the relative yield of spring barley. The hypothesis was that yield is restricted by the concentration of a single exchangeable cation in the soil. For simplicity, we focused on spring barley which was grown in nine years of a long-term experiment at two sites (Rothamsted and Woburn). Four liming rates were applied and in each year the relative yield (RY) and the concentrations of exchangeable cations were assessed. Liming had highly significant effects on the concentrations of most exchangeable cations, except for Cu and K. There were significant negative relationships (either linear or exponential) between the exchangeable concentrations of Mn, Cd, Cr, Al, Fe, Cu, Co, Zn and Ni in soil and soil pH. The relationships between RY and the concentrations of selected exchangeable cations (Mn, Ca and Al) were described well using log-logistic relationships. For these cations a significant site effect was probably due to fundamental differences in soil properties. At both sites the concentrations of exchangeable soil Al were excessive (> 7.5 mg kg) and were most likely responsible for reduced barley yields (where RY ≤ 0.5) with soil acidification. At Rothamsted barley yield was non-limited (where RY ≥ 1) at soil exchangeable Mn concentrations (up to 417 mg kg) greater than previously considered toxic, which requires further evaluation of critical Mn concentrations.
The online version of this article (10.1007/s10705-020-10117-2) contains supplementary material, which is available to authorized users.
施用石灰对土壤过程和作物反应具有广泛而显著的影响。本研究的目的是描述土壤中交换性阳离子浓度与春大麦相对产量之间的关系。假设产量受土壤中单一交换性阳离子浓度的限制。为简单起见，我们重点研究了在罗斯坦斯特德和沃本两个地点进行的为期九年的长期试验中种植的春大麦。施用了四种石灰施用量，并在每年评估相对产量（RY）和交换性阳离子浓度。除铜和钾外，施用石灰对大多数交换性阳离子的浓度有极显著影响。土壤中锰、镉、铬、铝、铁、铜、钴、锌和镍的交换性浓度与土壤pH值之间存在显著的负相关关系（线性或指数关系）。使用对数逻辑关系能很好地描述RY与选定交换性阳离子（锰、钙和铝）浓度之间的关系。对于这些阳离子，显著的地点效应可能是由于土壤性质的根本差异。在两个地点，土壤交换性铝的浓度都过高（>7.5毫克/千克），很可能是土壤酸化导致大麦产量降低（RY≤0.5）的原因。在罗斯坦斯特德，当土壤交换性锰浓度（高达417毫克/千克）高于先前认为的有毒浓度时，大麦产量不受限制（RY≥1），这需要进一步评估临界锰浓度。
本文的在线版本（10.1007/s10705-020-10117-2）包含补充材料，授权用户可获取。
