Phosphorus retention and remobilization in vegetated buffer strips: a review.
Phosphorus retention and remobilization in vegetated buffer strips: a review.
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DOI：
10.2134/jeq2010.0543
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发表时间：
2012-03
影响因子：
2.4
通讯作者：
W. M. Roberts;M. Stutter;P. Haygarth
中科院分区：
文献类型：
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作者：
W. M. Roberts;M. Stutter;P. Haygarth
由于农田中磷（P）的转移引起的富营养化，扩散污染仍然是地表沃茨的主要威胁。植被缓冲带（VBSs）越来越多地用于减轻扩散的磷从农田的损失，已被证明可以减少颗粒磷转移。然而，溶解磷（DP）的保留率较低，在某些情况下，VBSs增加了向地表沃茨的输送。本次审查的目的是：（一）制定一个概念模型，以提高对志愿服务在发展伙伴关系方面的运作的理解，（二）确定模型中影响发展伙伴关系保留和交付的关键流程，以及（三）探索对这些流程进行控制的证据。对这些领域的更深入了解将有助于制定增强DP保留的管理策略。我们发现的缓冲带土壤中的表面层的证据是丰富的可溶性磷相比，邻近的农业用地，并可能负责报告增加DP交付。通过提高VBSs中的生物活性，植物和微生物可以从VBSs中保留的颗粒物或原生土壤P中吸收P，并以更可溶的形式再活化该P。这些结论是基于有限的研究，需要更好地了解缓冲带土壤中磷的生物地球化学循环。
Diffuse pollution remains a major threat to surface waters due to eutrophication caused by phosphorus (P) transfer from agricultural land. Vegetated buffer strips (VBSs) are increasingly used to mitigate diffuse P losses from agricultural land, having been shown to reduce particulate P transfer. However, retention of dissolved P (DP) has been lower, and in some cases VBSs have increased delivery to surface waters. The aims of this review were (i) to develop a conceptual model to enhance the understanding of VBS functioning in terms of DP, (ii) to identify key processes within the model that affect DP retention and delivery, and (iii) to explore evidence for the controls on these processes. A greater understanding in these areas will allow the development of management strategies that enhance DP retention. We found evidence of a surface layer in buffer strip soils that is enriched in soluble P compared with adjacent agricultural land and may be responsible for the reported increased DP delivery. Through increased biological activity in VBSs, plants and microorganisms may assimilate P from particulates retained in the VBSs or native soil P and remobilize this P in a more soluble form. These conclusions are based on a limited amount of research, and a better understanding of biogeochemical cycling of P in buffer strip soils is required.