Almonds, vilified during the current drought for being one of California鈥檚 thirstier crops, have a surprisingly small carbon footprint compared to other nutrient-rich crops, reports a team of researchers at the University of California, Davis, and 新澳门六合彩内幕信息 Agriculture and Natural Resources.
The findings are important for evaluating the environmental impact of California-grown almonds, which make up 80 percent of the world's commercial almonds. The term 鈥渃arbon footprint鈥 refers to the total amount of carbon dioxide and other greenhouse gasses produced annually by an activity or entity and is of concern because of the impact greenhouse gases have on global warming.
"Our research shows that 1 kilogram of California almonds typically produces less than 1 kilogram of CO2-equivqlent emissions," said Alissa Kendall, an associate professor in the 新澳门六合彩内幕信息 Davis Department of Civil and Environmental Engineering and corresponding author on two related open-access papers published this week in the Journal of Industrial Ecology.
Kendall noted that the study results include the use of almond co-products 鈥 orchard biomass, hulls and shells 鈥 for renewable power generation and dairy feed. Orchard biomass refers to prunings as well as trees removed from an orchard.
鈥淯nder ideal circumstances, which are feasible but not in place today, California almonds could become carbon-neutral or even carbon-negative, largely through the improved utilization of orchard biomass,鈥 Kendall said.
An activity or process is considered carbon-negative if, overall, it leads to a net reduction of greenhouse gases, either by directly removing and sequestering CO2 from the atmosphere or by avoiding greenhouse gas emissions that would otherwise occur.
鈥淥nly a full, life cycle-based model like the one we developed for this research will allow us to accurately assess whether incorporating the biomass into the soil or using it for power generation instead results in a lower net carbon footprint,鈥 said co-author , academic coordinator in the 新澳门六合彩内幕信息 ANR Sustainable Agriculture Research and Education Program at 新澳门六合彩内幕信息 Davis, noting that there will be some trade-offs.
Almond demand spurs plantings
Popularity of almonds and almond-based products has spurred California almond acreage to expand from 510,000 acres in 2000 to roughly 890,000 acres in 2015, according to the .
The new 新澳门六合彩内幕信息 study reported in these articles was prompted by growing interest among consumers and food companies in the carbon footprint of various food products and by California鈥檚 Global Warming Solutions Act of 2006, which requires statewide reductions in greenhouse gas emissions.
Study collaborators and funding
The first article, "," is authored by Kendall; , a graduate student in the 新澳门六合彩内幕信息 Davis Department of Plant Sciences; Brodt; and , a 新澳门六合彩内幕信息 Davis graduate student in horticulture and agronomy.
Marvinney is lead author of the second article, "," in collaboration with Kendall and Brodt.
Funding for the study was provided by the Almond Board of California and the California Department of Agriculture Specialty Crop Block Grant Program.
新澳门六合彩内幕信息 Davis is growing California
At 新澳门六合彩内幕信息 Davis, we and our partners are nourishing our state with food, economic activity and better health, as the top national agricultural producer for more than 50 years. 新澳门六合彩内幕信息 Davis is participating in launched by 新澳门六合彩内幕信息 President Janet Napolitano, harnessing the collective power of 新澳门六合彩内幕信息 to help feed the world and steer it on the path to sustainability.
Media Resources
Pat Bailey, Research news (emphasis: agricultural and nutritional sciences, and veterinary medicine), 530-219-9640, pjbailey@ucdavis.edu
Alissa Kendall, Civil and Environmental Engineering, (530) 752-5722, amkendall@ucdavis.edu
Sonja Brodt, Sustainable Agriculture Research and Education Program, (530) 754 8547, sbbrodt@ucdavis.edu
Aubrey White, Agricultural Sustainability Institute at 新澳门六合彩内幕信息 Davis, (530) 752-5299, abwhite@ucdavis.edu