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LinkedInPosts Tagged: food
Feeding grazing cattle seaweed cuts methane emissions by almost 40%
Findings offer solution for more climate-friendly cattle farming
Seaweed is once again showing promise for making cattle farming more sustainable. A new study by researchers at the University of California, Davis, found that feeding grazing beef cattle a seaweed supplement in pellet form reduced their methane emissions by almost 40% without affecting their health or weight. The study was published Dec. 2 in Proceedings of the National Academy of Sciences.
This is the first study to test seaweed on grazing beef cattle in the world. It follows previous studies that showed seaweed cut methane emissions 82% in feedlot cattle and over 50% in dairy cows.
How much methane do cattle produce?
“Beef cattle spend only about three months in feedlots and spend most of their lives grazing on pasture and producing methane,” said senior author Ermias Kebreab, professor in the Department of Animal Science. “We need to make this seaweed additive or any feed additive more accessible to grazing cattle to make cattle farming more sustainable while meeting the global demand for meat.”
Difficulty in reducing methane emissions from cattle
Kebreab said that daily feeding of pasture-based cattle is more difficult than feedlot or dairy cows because they often graze far from ranches for long periods. However, during the winter or when grass is scarce, ranchers often supplement their diet.
For this study, researchers divided 24 beef steers (a mix of Angus and Wagyu breeds) into two groups: one received the seaweed supplement, and the other did not. Researchers conducted the 10-week experiment at a ranch in Dillon, Montana. Since these were grazing cattle, they ate the supplement voluntarily, which still resulted in a nearly 40% cut in emissions.
Most research studies to reduce methane emissions using feed additives have taken place in controlled environments with daily supplements. But Kebreab noted in the study that fewer than half of those methods are effective for grazing cattle.
“This method paves the way to make a seaweed supplement easily available to grazing animals,” said Kebreab. “Ranchers could even introduce the seaweed through a lick block for their cattle.”
Kebreab said pastoral farming, which includes large grazing systems, supports millions of people around the world, often in areas vulnerable to climate change. This study suggests a way to make cattle grazing better for the environment, while playing a role in fighting climate change.
A related article in the same PNAS issue highlights the need to improve the efficiency of livestock production in low- and middle-income countries using better genetics, feeding and health practices. UC Davis Professor and Cooperative Extension Specialist Alison Van Eenennaam, the article's author, said it is the most promising approach to meet the global demand for meat while limiting greenhouse gas emissions.
Other authors of the seaweed study include UC Davis postdoctoral researchers Paulo de Méo Filho and John-Fredy Ramirez-Agudelo.
The research was supported by Matador Ranch in Dillon, Montana.
This article was first published on the UC Davis news site.
Desert Organic Research and Food Safety Workshop set for Dec. 4 in Holtville
The "Advances in Southwest Desert Agriculture Research, Organic Production and Food Safety" workshop is scheduled for Dec. 4 in Holtville. This event will showcase cutting-edge research and practical organic farming strategies tailored to California's unique desert environment.
The symposium will feature presentations from University of California Cooperative Extension advisors and other experts.
The agenda covers a range of critical topics, including insect pest management in low desert agriculture, weed management strategies for guayule seedlings, summer cover crops for soil health and disease management, integrated pest management for onion diseases, predicting sugar beet cyst nematode suppressiveness, and microbial risk assessment of soil amendments in organic romaine lettuce.
“These presentations will provide valuable insights into improving desert vegetable production, irrigation efficiency, and food safety practices specific to our region,” said co-organizer Jimmy Nguyen, University of California Cooperative Extension food safety and organic production area advisor for Imperial and Riverside counties.
“This symposium presents an excellent opportunity to learn about the latest research findings directly applicable to Imperial County agriculture, gain practical knowledge to enhance your agricultural practices, and network with fellow professionals and researchers in the field.”
The UC Cooperative Extension team aims to foster the exchange of ideas and promote the advancement of agricultural practices in the community.
“We encourage everyone involved in growing crops in Imperial County to attend this informative event and contribute to the ongoing dialogue on agricultural innovation in the Southwest desert region,” Nguyen said.
The workshop will be held at Barbara Worth Country Club, 2050 Country Club Dr, Holtville, CA 92250. Register at https://surveys.ucanr.edu/survey.cfm?surveynumber=43924.
For more information, please contact UC Cooperative Extension advisors Jimmy Nguyen, cgnguyen@ucanr.edu; Philip Waisen, pwaisen@ucanr.edu; Ali Montazar, amontazar@ucanr.edu; or Oli Bachie, obachie@ucanr.edu; or call (442) 265-7700.
CFHL, UC and UCCE Alameda team up with UCSF for Food Farmacy
Green peas, orange carrot cubes and squares of white tofu sizzled as they were stirred into brown rice in an electric frying pan. “Smells good,” commented a man walking to the fresh produce display.
Every week UC San Francisco Benioff Children's Hospital in Oakland gives away fresh produce to patients and community members at its Food Farmacy to improve food security in the community. On Nov. 14, nutrition experts from UC Cooperative Extension and CalFresh Healthy Living, UC joined UCSF colleagues to encourage Oakland residents to eat fresh fruits and vegetables for better health.
Tuline Baykal, CalFresh Healthy Living, UC Cooperative Extension program supervisor in Alameda County, and CFHL, UC community educators Mercy Mumba, Yolanda Silva and Mariela Wajler showed visitors how to prepare dishes that could be easily made from fresh produce. Mumba and Wajler cooked tofu fried rice while Silva tossed slices of persimmon, dried cranberries and spinach together before drizzling an orange juice dressing on top. They handed out recipes with samples of the foods.
Alexa Erickson, UCCE nutrition advisor for Alameda and Contra Costa counties, was on site to answer nutrition questions.
Community members could choose from a generous array of free leafy greens, cucumbers, red cabbage, carrots, potatoes, tomatoes, citrus, red onions, bell peppers, chicken and other grocery items.
Through their collaboration, the UCSF health professionals and UC ANR nutrition educators hope to highlight the role of food in healthy living and California farms in producing healthy living options.
“A partnership with UCSF Benioff Children's Hospital Clinics presents opportunities for us to expand our delivery of CalFresh Healthy Living, UC education to parents in places they are going to receive health care for their children – making this vital nutrition education more accessible,” said Andra Nicoli, CalFresh Healthy Living, UC program and project policy analyst based at UC Davis College of Agriculture and Environmental Sciences.
Nicoli worked with Antonio De Wolk, UCSF's assistant director of content strategy, and Rigoberto Del Toro, manager of the Food Farmacies at UCSF Benioff Children's Hospital Oakland, to coordinate UC ANR's participation in the Food Farmacy.
MSU Soil Scientist to Discuss Nematodes as "Bioindicators of Soil Health and Climate Resiliency'
Nematodes, says soil scientist Christine Sprunger of Michigan State University, East...
Soil scientist Christine Sprunger (left) and lab manager of the W. K. Kellogg Biological Station (KBS), Michigan State University, collecting soil samples. (Photo courtesy of KBS)
Invasive Pest Spotlight: Mediterranean Fruit Fly
The invasive pest spotlight focuses on emerging or potential invasive pests in California. In this...
