Academic Journal
Organic amendment additions to rangelands: A meta‐analysis of multiple ecosystem outcomes
| العنوان: | Organic amendment additions to rangelands: A meta‐analysis of multiple ecosystem outcomes |
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| المؤلفون: | Gravuer, Kelly, Gennet, Sasha, Throop, Heather L. |
| المساهمون: | Division of Environmental Biology, Arizona State University, University of California |
| المصدر: | Global Change Biology ; volume 25, issue 3, page 1152-1170 ; ISSN 1354-1013 1365-2486 |
| بيانات النشر: | Wiley |
| سنة النشر: | 2019 |
| المجموعة: | Wiley Online Library (Open Access Articles via Crossref) |
| الوصف: | Interest in land application of organic amendments—such as biosolids, composts, and manures—is growing due to their potential to increase soil carbon and help mitigate climate change, as well as to support soil health and regenerative agriculture. While organic amendments are predominantly applied to croplands, their application is increasingly proposed on relatively arid rangelands that do not typically receive fertilizers or other inputs, creating unique concerns for outcomes such as native plant diversity and water quality. To maximize environmental benefits and minimize potential harms, we must understand how soil, water, and plant communities respond to particular amendments and site conditions. We conducted a global meta‐analysis of 92 studies in which organic amendments had been added to arid, semiarid, or Mediterranean rangelands. We found that organic amendments, on average, provide some environmental benefits (increased soil carbon, soil water holding capacity, aboveground net primary productivity, and plant tissue nitrogen; decreased runoff quantity), as well as some environmental harms (increased concentrations of soil lead, runoff nitrate, and runoff phosphorus; increased soil CO 2 emissions). Published data were inadequate to fully assess impacts to native plant communities. In our models, adding higher amounts of amendment benefitted four outcomes and harmed two outcomes, whereas adding amendments with higher nitrogen concentrations benefitted two outcomes and harmed four outcomes. This suggests that trade‐offs among outcomes are inevitable; however, applying low‐N amendments was consistent with both maximizing benefits and minimizing harms. Short study time frames (median 1–2 years), limited geographic scope, and, for some outcomes, few published studies limit longer‐term inferences from these models. Nevertheless, they provide a starting point to develop site‐specific amendment application strategies aimed toward realizing the potential of this practice to contribute to climate change ... |
| نوع الوثيقة: | article in journal/newspaper |
| اللغة: | English |
| DOI: | 10.1111/gcb.14535 |
| الاتاحة: | http://dx.doi.org/10.1111/gcb.14535 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fgcb.14535 https://onlinelibrary.wiley.com/doi/pdf/10.1111/gcb.14535 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/gcb.14535 https://onlinelibrary.wiley.com/doi/am-pdf/10.1111%2Fgcb.14535 |
| Rights: | http://creativecommons.org/licenses/by/4.0/ ; http://creativecommons.org/licenses/by/4.0/ |
| رقم الانضمام: | edsbas.980F5479 |
| قاعدة البيانات: | BASE |
| DOI: | 10.1111/gcb.14535 |
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