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首页> 外文期刊>Carbon balance and management >Building houses and managing lawns could limit yard soil carbon for centuries
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Building houses and managing lawns could limit yard soil carbon for centuries

机译：建筑房屋和管理草坪可能会限制几个世纪的土壤碳

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Comparisons of soil carbon (C) pools across land uses can be confounded by site-specific history. To better quantify the response of soil C pools to residential development and use, we compared yard soils (n?=?20) to adjacent mown fields and second-growth forests within land-use clusters (LUC; n?=?12). Land uses within clusters shared site-specific legacies (land use and other soil forming history) prior to residential development (15-227 years ago). We analyzed soil cores to 60-cm depth for carbon, nitrogen, and bulk density. Within one LUC, we monitored soil dissolved organic carbon, moisture, and thermal regimes to explain soil C dynamics. We accounted for pre-development legacies to test how present uses affect soil properties. We found that yard soil C pools to 60-cm depth (9.07?±?0.32?kg C m-2; mean?±?SE) were smaller than fields (10.26?±?0.44?kg C m-2) and forests (10.62?±?0.87?kg C m-2). Fields contained more nitrogen to 60-cm depth (0.78?±?0.043?kg?N m-2) than yards (0.68?±?0.030?kg?N m-2) and forests (0.69?±?0.057?kg?N m-2?150 years), where residents in recent times mowed monthly to bimonthly and left clippings on the lawn, there was evidence of soil C and N gains relative to old commercially managed yards mown weekly with clippings exported. Our study suggests land conversion to yard can limit soil C pools for centuries, with contemporary management key to that trajectory. Our research points to the importance of accounting for pre-development legacies to reveal the response of soil properties to land conversion and present use. This work can inform policies and land use intended to enhance the soil C sink and minimize development-related soil C losses.
机译：土地使用的土壤碳（C）池的比较可以被特定地点的历史混淆。为了更好地量化土壤C池对住宅开发和使用的响应，我们将院子里的土壤（N？= 20）与陆地使用簇（Luc; N？= 12）进行了比较到邻近的割草片和二生长林。在住宅开发之前（15-227年前），土地在群集群中共享了特定于现场特定的遗产（土地使用和其他土壤成型历史）。我们分析了碳，氮和散装密度的60厘米深度的土壤芯。在一个LUC内，我们监测土壤溶解的有机碳，水分和热性制度，以解释土壤C动力学。我们考虑了预开发的遗产，以测试当前如何影响土壤属性。我们发现院子里的土壤C池深度为60厘米的深度（9.07？±0.32？kg C m-2;平均值？±αSe）小于田地（10.26？±0.44 kg c m-2）和森林（10.62？±0.87？kg C m-2）。字段含有更多的氮气至60厘米深度（0.78？±0.043？kg？n m-2）（0.68？±0.030？kg？n m-2）和森林（0.69？±0.057？kg？ N M-2？150年），近期居民每月割草到草坪上的起伏并留下剪切，有证据表明，相对于每周播种的旧商业管理的院子有相对于旧商业管理码。我们的研究表明土地转换为院子可以限制几个世纪的土壤C游泳池，当代管理钥匙到该轨迹。我们的研究表明，核算前发展遗产的重要性，揭示土壤性质对陆地转换和目前使用的响应。这项工作可以通知政策和土地利用，旨在增强土壤C水槽，并尽量减少与发展有关的土壤C损失。

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