Restoring Soil Fertility on Degraded Lands to Meet Food, Fuel, and Climate Security Needs via Perennialization

Frontiers in Sustainable Food Systems

G. Philip Robertson¹  S. Carolina Córdova¹  Samantha Mosier¹ 

[1] Department of Plant, Soil and Microbial Sciences, Michigan State University, East Lansing, MI, United States;Great Lakes Bioenergy Research Center, Michigan State University, East Lansing, MI, United States;W. K. Kellogg Biological Station, Michigan State University, Hickory Corners, MI, United States;

关键词: degraded lands;    marginal lands;    soil fertility;    soil carbon;    soil nitrogen;    soil phosphorus;   

DOI  :  10.3389/fsufs.2021.706142

来源: DOAJ

【 摘 要 】

A continuously growing pressure to increase food, fiber, and fuel production to meet worldwide demand and achieve zero hunger has put severe pressure on soil resources. Abandoned, degraded, and marginal lands with significant agricultural constraints—many still used for agricultural production—result from inappropriately intensive management, insufficient attention to soil conservation, and climate change. Continued use for agricultural production will often require ever more external inputs such as fertilizers and herbicides, further exacerbating soil degradation and impeding nutrient recycling and retention. Growing evidence suggests that degraded lands have a large potential for restoration, perhaps most effectively via perennial cropping systems that can simultaneously provide additional ecosystem services. Here we synthesize the advantages of and potentials for using perennial vegetation to restore soil fertility on degraded croplands, by summarizing the principal mechanisms underpinning soil carbon stabilization and nitrogen and phosphorus availability and retention. We illustrate restoration potentials with example systems that deliver climate mitigation (cellulosic bioenergy), animal production (intensive rotational grazing), and biodiversity conservation (natural ecological succession). Perennialization has substantial promise for restoring fertility to degraded croplands, helping to meet future food security needs.

【 授权许可】

Unknown