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Model-Based Analysis of the Long-Term Effects of Fertilization Management on Cropland Soil Acidification

机译:施肥管理对农田土壤酸化的长期影响的基于模型的分析

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摘要

Agricultural soil acidification in China is known to be caused by the over-application of nitrogen (N) fertilizers, but the long-term impacts of different fertilization practices on intensive cropland soil acidification are largely unknown. Here, we further developed the soil acidification model VSD+ for intensive agricultural systems and validated it against observed data from three long-term fertilization experiments in China. The model simulated well the changes in soil pH and base saturation over the last 20 years. The validated model was adopted to quantify the contribution of N and base cation (BC) fluxes to soil acidification. The net NO_3~- leaching and NO_4~+input accounted for 80% of the proton production under N application, whereas one-third of acid was produced by BC uptake when N was not applied. The simulated long-term (1990-2050) effects of different fertilizations on soil acidification showed that balanced N application combined with manure application avoids reduction of both soil pH and base saturation, while application of calcium nitrate and liming increases these two soil properties. Reducing NH_4~+ input and NO_3~- leaching by optimizing N management and increasing BC inputs by manure application thus already seem to be effective approaches to mitigating soil acidification in intensive cropland systems.
机译:众所周知,中国农业土壤酸化是由氮肥的过量使用引起的,但是不同施肥方法对耕地集约化土壤酸化的长期影响尚不清楚。在这里,我们进一步开发了集约型农业系统的土壤酸化模型VSD +,并根据来自中国三个长期施肥实验的观察数据进行了验证。该模型很好地模拟了过去20年中土壤pH和碱饱和度的变化。采用经过验证的模型来量化N和基础阳离子(BC)通量对土壤酸化的贡献。在施氮条件下,净NO_3〜-浸出和NO_4〜+投入占质子产生的80%,而三分之一的酸是在不施氮时通过BC吸收而产生的。不同肥料对土壤酸化的长期(1990-2050年)模拟结果表明,平衡施用氮肥和施肥可避免土壤pH值和碱饱和度降低,而施用硝酸钙和石灰则可提高这两种土壤的特性。通过优化氮肥管理来减少NH_4〜+的输入和NO_3〜-的淋失,以及通过施用肥料来增加BC的输入,因此似乎已经成为减轻集约化耕地系统土壤酸化的有效方法。

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  • 来源
    《Environmental Science & Technology》 |2017年第7期|3843-3851|共9页
  • 作者单位

    College of Resources and Environmental Sciences, Centre for Resources, Environment and Food Security, Key Lab of Plant-Soil Interactions, MOE, China Agricultural University, Beijing 100193, China;

    Environmental Systems Analysis Group, Wageningen University, P.O. Box 47, 6700 AA Wageningen, The Netherlands,Alterra-Wageningen UR, Soil Science Centre, P.O. Box 47, 6700 AA Wageningen, The Netherlands;

    Alterra-Wageningen UR, Soil Science Centre, P.O. Box 47, 6700 AA Wageningen, The Netherlands;

    College of Resources and Environmental Sciences, Centre for Resources, Environment and Food Security, Key Lab of Plant-Soil Interactions, MOE, China Agricultural University, Beijing 100193, China,Environmental Systems Analysis Group, Wageningen University, P.O. Box 47, 6700 AA Wageningen, The Netherlands;

    College of Resources and Environmental Sciences, Centre for Resources, Environment and Food Security, Key Lab of Plant-Soil Interactions, MOE, China Agricultural University, Beijing 100193, China;

    College of Resources and Environmental Sciences, Centre for Resources, Environment and Food Security, Key Lab of Plant-Soil Interactions, MOE, China Agricultural University, Beijing 100193, China;

    Ministry of Agriculture Key Laboratory of Plant Nutrition and Nutrient Cycling, Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, China;

    College of Resources and Environment, Southwest University, Chongqing 400716, China;

    College of Resources and Environmental Sciences, Centre for Resources, Environment and Food Security, Key Lab of Plant-Soil Interactions, MOE, China Agricultural University, Beijing 100193, China;

    College of Resources and Environmental Sciences, Centre for Resources, Environment and Food Security, Key Lab of Plant-Soil Interactions, MOE, China Agricultural University, Beijing 100193, China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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  • 正文语种 eng
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