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首页> 外文期刊>Current Science: A Fortnightly Journal of Research >Nitrous oxide emissions from turfgrass lawns as a result of fertilizer application: a meta-analysis of available literature
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Nitrous oxide emissions from turfgrass lawns as a result of fertilizer application: a meta-analysis of available literature

机译：从肥料应用中，草坪草草坪的氧化二氮排放量：可用文献的荟萃分析

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Urban turfgrass lawns are known to contribute towards global anthropogenic nitrous oxide emissions. However, available literature on lawn N2O emissions is varied and inconclusive. To our knowledge, an effort to compile and understand urban lawn N2O emissions is, as yet, lacking. In the present article, a metaanalysis was conducted to evaluate the effect of lawn fertilizer application on N2O emissions relative to nofertilizer application, along with an examination of the variation of this effect with respect to the type and amount of fertilizer. The results show that lawn N2O emissions from fertilized plots are significant and are 41% (0.29 g N2O-N/m(2)/year) higher than that of control plots. However, studies with low N-input (<150 kg/ha) show higher percentage (40) of N2O emission than those with high N-input (22). Further, N2O emissions are higher for urea application plots (37%) compared to other-than-urea plots (30%), which consisted mostly of enhanced efficiency fertilizer plots. Overall, the results of this meta-analysis underscore current understandings of the effect of fertilizer on soil N2O emissions, although it indicates that fertilizer amount is not the only driver of lawn N2O emissions. Also, the sub-group analysis of fertilizer type reinforces the importance of enhanced efficiency fertilizers in reducing emissions which has clear policy implications. To improve our understanding of lawn N2O emissions, more long-term studies that are well-documented, and geographically widespread, are recommended to build a database that can reduce uncertainties and facilitate long-term evaluations.
机译：已知城市草坪草草坪促进全球人为非氧化二氮氧化物排放。然而，在草坪N2O排放的可用文献是不同的，不确定的。迄今为止，我们的知识，努力编制和理解城市草坪的排放量缺乏。在本文中，进行了多种分析，以评估LAWN肥料应用对NOFERTilizer应用的影响，以及对肥料类型和量的这种效果的变化检查。结果表明，来自受精图的草坪N2O排放显着，均为41％（0.29g N2O-n / m（2）/年）高于对照图。然而，具有低N输入（<150 kg / ha）的研究显示比具有高N输入（22）的N2O发射的百分比（40）。此外，与其他与脲图（30％）相比，N2O排放含量较高，尿素施用图（37％）主要由增强效率肥料图组成。总体而言，该荟萃分析的结果强调了当前对肥料对土壤N2O排放作用的影响，尽管它表明肥料量不是草坪N2O排放的唯一驱动因素。此外，肥料类型的亚组分析增强了增强效率肥料在减少具有明确政策影响的排放中的重要性。为了提高我们对草坪N2O排放的理解，建议更好地记录和地理上广泛的更长期的研究来构建一个可以减少不确定性并促进长期评估的数据库。

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