Meta-analysis of the effect of urease and nitrification inhibitors on crop productivity and nitrogen use efficiency
Meta-analysis of the effect of urease and nitrification inhibitors on crop productivity and nitrogen use efficiency
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DOI：
10.1016/j.agee.2014.03.036
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发表时间：
2014-05-01
影响因子：
6.6
通讯作者：
Vallejo, Antonio
中科院分区：
文献类型：
--
作者：
Abalos, Diego;Jeffery, Simon;Vallejo, Antonio
硝化作用和脲酶抑制剂被提出作为减少氮素损失的手段，从而提高作物氮素利用效率（NUE）。然而，它们对作物产量的影响是可变的。进行了荟萃分析，以评估它们在提高NUE和作物生产力方面的有效性。选择常用的硝化抑制剂（双氰胺（DCD）和3，4-二甲基吡唑磷酸盐（DMPP））和脲酶抑制剂N-（正丁基）硫代磷酰三胺（NBPT）进行分析，因为它们通常被认为是最佳的可用选项。我们的研究结果表明，它们的使用可以推荐，以提高作物产量和NUE（总平均增加7.5%和12.9%，分别）。然而，其有效性取决于所评价研究的环境和管理因素。较大的反应被发现在粗质地的土壤，灌溉系统和/或作物接受高氮肥率。在碱性土壤（pH >= 8）中，尿素酶抑制剂NBPT的作用量最大。鉴于其使用对农民来说意味着额外的成本，了解最佳管理做法以最大限度地提高其有效性至关重要，以便与其他提高作物产量和NUB的做法进行有效比较。(C)2014爱思唯尔有限公司版权所有。
Nitrification and urease inhibitors are proposed as means to reduce nitrogen losses, thereby increasing crop nitrogen use efficiency (NUE). However, their effect on crop yield is variable. A meta-analysis was conducted to evaluate their effectiveness at increasing NUE and crop productivity. Commonly used nitrification inhibitors (dicyandiamide (DCD) and 3,4-dimethylepyrazole phosphate (DMPP)) and the urease inhibitor N-(n-butyl) thiophosphoric triamide (NBPT) were selected for analysis as they are generally considered the best available options. Our results show that their use can be recommended in order to increase both crop yields and NUE (grand mean increase of 7.5% and 12.9%, respectively). However, their effectiveness was dependent on the environmental and management factors of the studies evaluated. Larger responses were found in coarse-textured soils, irrigated systems and/or crops receiving high nitrogen fertilizer rates. In alkaline soils (pH >= 8), the urease inhibitor NBPT produced the largest effect size. Given that their use represents an additional cost for farmers, understanding the best management practices to maximize their effectiveness is paramount to allow effective comparison with other practices that increase crop productivity and NUB. (C) 2014 Elsevier B.V. All rights reserved.