Long-term influence of manure and mineral nitrogen applications on plant and soil 15N and 13C values from the Broadbalk Wheat Experiment
Long-term influence of manure and mineral nitrogen applications on plant and soil 15N and 13C values from the Broadbalk Wheat Experiment
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DOI：
10.1002/rcm.3548
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发表时间：
2008-06-01
影响因子：
2
通讯作者：
Bol, Roland
中科院分区：
文献类型：
--
作者：
Senbayram, Mehmet;Dixon, Liz;Bol, Roland
英国洛桑研究中心的布罗德巴尔克小麦实验提供了一个独特的机会来研究环境变化和农艺实践对植物和土壤的长期影响。我们研究了粪肥和矿物肥料施用对 1968-1979 年和 1996-2005 年收集的小麦以及 1966 年和 2000 年收集的土壤稳定 N (N-15) 和 C (C-13) 同位素时间趋势的影响。1966 年和 2000 年粪肥中的土壤 Delta N-15 值高于提供矿物氮的土壤；后者具有与未施肥土壤相似或更高的 Delta N-15 值。 1968 年至 1979 年期间，所有施氮处理的秸秆 Delta N-15 值均显着下降，但 1996 年至 2005 年则没有。从1968年到1979年，在最高矿物氮供应（192千克氮·公顷（-1），年（-1））下，秸秆三角洲N-15值下降了千分之3。干旱年份，矿物氮供应显着增加至秸秆三角洲C-13值，但在潮湿年份则不然。麦秆三角洲 C-13 值与累计降雨量（3 月至 6 月）之间存在显着相关性。与 Cappelle Desprez (1968-1979) 相比，Hereward 品种（生长于 1996-2005 年）受环境条件变化（即水分胁迫和施肥制度）的影响较小。我们得出的结论是，除了肥料类型和施用量之外，水分胁迫以及重要的是植物品种也会影响植物 Delta C-13 和 Delta N-15 值。因此，在植物研究中应考虑水分胁迫和差异品种反应，利用植物 Delta C-13 和 Delta N-15 趋势来描述过去或最近的环境或农艺变化。版权所有 (C) 2008 约翰·威利父子有限公司
The Broadbalk Wheat Experiment at Rothamsted Research in the UK provides a unique opportunity to investigate the long-term impacts of environmental change and agronomic practices on plants and soils. We examined the influence of manure and mineral fertiliser applications on temporal trends in the stable N (N-15) and C (C-13) isotopes of wheat collected during 1968-1979 and 1996-2005, and of soil collected in 1966 and 2000. The Soil delta N-15 values in 1966 and 2000 were higher in manure than the mineral N supplied soil; the latter had similar or higher delta N-15 values than non-fertilised soil. The straw delta N-15 values significantly decreased in all N treatments during 1968 to 1979, but not for 1996-2005. The straw delta N-15 values decreased under the highest mineral N supply (192 kg N ha(-1), year(-1)) by 3 parts per thousand from 1968 to 1979. Mineral N supply significantly increased to straw delta C-13 values in dry years, but not in wet years. Significant correlations existed between wheat straw delta C-13 values with cumulative rainfall (March to June). The cultivar Hereward (grown 1996-2005) was less affected by changes in environmental conditions (i.e. water stress and fertiliser regime) than Cappelle Desprez (1968-1979). We conclude that, in addition to fertiliser type and application rates, water stress and, importantly, plant variety influenced plant delta C-13 and delta N-15 values. Hence, water stress and differential variety response should be considered in plant studies using plant delta C-13 and delta N-15 trends to delineate past or recent environmental or agronomic changes. Copyright (C) 2008 John Wiley & Sons, Ltd.