Perennial ryegrass reestablished in 6 weeks after diesel, hydraulic fluid spills
Petroleum-based spills on turfgrass can occur during lawn care and maintenance, primarily as a result of equipment failure or improper refueling. When these spills happen, hazardous hydrocarbons can contaminate soil and compromise the chemical balance of the grass and soil.
The authors of a study in the June 2016 issue of HortTechnology found that application of mulching materials after soil remediation and reseeding was effective in reestablishing perennial ryegrass in 6 weeks after diesel and hydraulic fluid spills.
"Damage caused by hydrocarbons to turfgrass can be long lasting and difficult to correct due to slow degradation of most hydrocarbons by microbes in soils," explained Longyi Yuan, Yang Gao, and Deying Li, authors of the research report.
They said that the most effective methods currently used to reclaim soils after petroleum-based spills involve leaching contaminants with detergent water and applying absorbents such as a humic substance and activated charcoal. The scientists investigated how mulching and reseeding could be effective in speeding the reestablishment of turfgrass after petroleum-based spills.
In a 2-year study in field plots established with 'Kenblue' Kentucky bluegrass, the researchers applied diesel and hydraulic fluids at a rate of 15 L·m-2. They then applied two liquid humic amendments and an activated flowable charcoal, with tap water/dishwashing detergent used as a control.
Nitrate nitrogen was added to each remediation treatment to facilitate remediation. Next, the spilled areas were seeded with perennial ryegrass and then three mulching treatments (biochar, peat pellets, and paper pellets) were applied at a thickness of 0.375 inch.
Analyses showed that all remediation methods resulted in better green density of newly seeded perennial ryegrass than the untreated control. "The combination of peat pellets, mulching, and remediation with humic amendment 1 resulted in the best turfgrass green density in the reestablished perennial ryegrass," the authors said.
While previous remediation experiments using organic amendments alone found that turfgrass reestablishment took more than 4 months, the combination of remediation and mulching treatments in this study allowed for reestablishment of perennial ryegrass in just 6 weeks.
"This study tested perennial ryegrass only," the authors noted. "However, in a region where cool-season grasses predominate, overseeding with perennial ryegrass immediately after petroleum-based spills to create a grass cover is a practical option. Reseeding with a cool-season grass species conforming to the original lawn in a later stage can then be done if needed."
The complete study and abstract are available on the ASHS HortTechnology electronic journal web site: http://horttech.
Founded in 1903, the American Society for Horticultural Science (ASHS) is the largest organization dedicated to advancing all facets of horticultural research, education, and application. More information at ashs.org
Michael W. Neff | EurekAlert!
Cereals use chemical defenses in a multifunctional manner against different herbivores
06.12.2018 | Max-Planck-Institut für chemische Ökologie
Can rice filter water from ag fields?
05.12.2018 | American Society of Agronomy
A widely used diabetes medication combined with an antihypertensive drug specifically inhibits tumor growth – this was discovered by researchers from the University of Basel’s Biozentrum two years ago. In a follow-up study, recently published in “Cell Reports”, the scientists report that this drug cocktail induces cancer cell death by switching off their energy supply.
The widely used anti-diabetes drug metformin not only reduces blood sugar but also has an anti-cancer effect. However, the metformin dose commonly used in the...
A research team from the University of Zurich has developed a new drone that can retract its propeller arms in flight and make itself small to fit through narrow gaps and holes. This is particularly useful when searching for victims of natural disasters.
Inspecting a damaged building after an earthquake or during a fire is exactly the kind of job that human rescuers would like drones to do for them. A flying...
Over the last decade, there has been much excitement about the discovery, recognised by the Nobel Prize in Physics only two years ago, that there are two types...
What if a sensor sensing a thing could be part of the thing itself? Rice University engineers believe they have a two-dimensional solution to do just that.
Rice engineers led by materials scientists Pulickel Ajayan and Jun Lou have developed a method to make atom-flat sensors that seamlessly integrate with devices...
Scientists at the University of Stuttgart and the Karlsruhe Institute of Technology (KIT) succeed in important further development on the way to quantum Computers.
Quantum computers one day should be able to solve certain computing problems much faster than a classical computer. One of the most promising approaches is...
12.12.2018 | Event News
10.12.2018 | Event News
06.12.2018 | Event News
12.12.2018 | Health and Medicine
12.12.2018 | Physics and Astronomy
12.12.2018 | Health and Medicine