The Occurrence of Legacy P Soils and Potential Mitigation Practices Using Activated Biochar

被引：6

作者：

Cerven, Vasile ^{[1
]}

Novak, Jeff M. ^{[1
]}

Szogi, Ariel A. ^{[1
]}

Pantuck, Kenneth ^{[2
]}

Watts, Don W. ^{[1
]}

Johnson, Mark G. ^{[3
]}

机构：

[1] ARS, Water & Plant Res Ctr, Coastal Plains Soil, USDA, 2611 W Lucas St, Florence, SC 29501 USA

[2] US EPA, State Assistance & Partnerships Branch, Infrastruct & Assistance Sect, Water Div, Philadelphia, PA 19103 USA

[3] US EPA, Ctr Publ Hlth & Environm Assessment, Pacific Ecol Syst Div, Corvallis, OR 97333 USA

来源：

AGRONOMY-BASEL | 2021年 / 11卷 / 07期

关键词：

soils; legacy P soils; activated biochar; COASTAL-PLAIN SOILS; PHOSPHORUS REMOVAL; AGRICULTURAL PHOSPHORUS; DISSOLVED PHOSPHORUS; BY-PRODUCTS; WATER; MANURE; NITROGEN; DRAINAGE; RETENTION;

D O I：

10.3390/agronomy11071289

中图分类号：

S3 [农学（农艺学）];

学科分类号：

0901 ;

摘要：

The long-term application of manures in watersheds with dense animal production has increased soil phosphorus (P) concentration, exceeding plant and soil assimilative capacities. The P accumulated in soils that are heavily manured and contain excess extractable soil P concentrations is known as legacy P. Runoff and leaching can transport legacy P to ground water and surface water bodies, contributing to water quality impairment and environmental pollution, such as eutrophication. This review article analyzes and discusses current and innovative management practices for soil legacy P. Specifically, we address the use of biochar as an emerging novel technology that reduces P movement and bioavailability in legacy P soils. We illustrate that properties of biochar can be affected by pyrolysis temperature and by various activating chemical compounds and by-products. Our approach consists of engineering biochars, using an activation process on poultry litter feedstock before pyrolysis to enhance the binding or precipitation of legacy P. Finally, this review article describes previous examples of biochar activation and offers new approaches to the production of biochars with enhanced P sorption capabilities.

引用

页数：11

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