In poinsettias grown using these deficit irrigation methods, leaf and bract drop were reduced by 50% and 90% respectively, compared to well-watered plants.
Deficit irrigation is a technique that replaces only a percentage of the water that the plant loses. This stimulates the plant to produce hormones that can influence plant ‘robustness’ and improve tolerance to the stresses encountered during distribution and retailing. This technique not only reduces water use, but also reliance on plant growth regulators (PGRs) used in normal commercial production. These are labour intensive to apply and are reported to pose risks to the environment.
The work follows on from experiments conducted last season, in which Regulated Deficit Irrigation (RDI) was used on a commercial scale for the first time using a flood-and-drain system at Staplehurst Nurseries. A six-week RDI regime used during the period of rapid growth successfully reduced stem extension so that plant heights were well within specifications at simulated market date. RDI-treated plants received only 1 PGR spray shortly after ‘pinching’, compared to the 9 or 10 sprays needed to control height in the conventionally-irrigated plants.
Research leader Dr Mark Else says “Our research at Staplehurst Nurseries has shown that growers could use RDI to produce poinsettias with excellent shape and colour, as an alternative to intensive PGR spray programmes. In addition to saving water, other benefits include an improved shelf- and home-life thereby reducing wastage and reduced environmental pollution”.
New technique reveals details of forest fire recovery
17.05.2018 | DOE/Brookhaven National Laboratory
Mixed forests: ecologically and economically superior
09.05.2018 | Technische Universität München
So-called quantum many-body scars allow quantum systems to stay out of equilibrium much longer, explaining experiment | Study published in Nature Physics
Recently, researchers from Harvard and MIT succeeded in trapping a record 53 atoms and individually controlling their quantum state, realizing what is called a...
The historic first detection of gravitational waves from colliding black holes far outside our galaxy opened a new window to understanding the universe. A...
A team led by Austrian experimental physicist Rainer Blatt has succeeded in characterizing the quantum entanglement of two spatially separated atoms by observing their light emission. This fundamental demonstration could lead to the development of highly sensitive optical gradiometers for the precise measurement of the gravitational field or the earth's magnetic field.
The age of quantum technology has long been heralded. Decades of research into the quantum world have led to the development of methods that make it possible...
Cardiovascular tissue engineering aims to treat heart disease with prostheses that grow and regenerate. Now, researchers from the University of Zurich, the Technical University Eindhoven and the Charité Berlin have successfully implanted regenerative heart valves, designed with the aid of computer simulations, into sheep for the first time.
Producing living tissue or organs based on human cells is one of the main research fields in regenerative medicine. Tissue engineering, which involves growing...
A team of scientists of the Max Planck Institute for the Structure and Dynamics of Matter (MPSD) at the Center for Free-Electron Laser Science in Hamburg investigated optically-induced superconductivity in the alkali-doped fulleride K3C60under high external pressures. This study allowed, on one hand, to uniquely assess the nature of the transient state as a superconducting phase. In addition, it unveiled the possibility to induce superconductivity in K3C60 at temperatures far above the -170 degrees Celsius hypothesized previously, and rather all the way to room temperature. The paper by Cantaluppi et al has been published in Nature Physics.
Unlike ordinary metals, superconductors have the unique capability of transporting electrical currents without any loss. Nowadays, their technological...
02.05.2018 | Event News
13.04.2018 | Event News
12.04.2018 | Event News
18.05.2018 | Power and Electrical Engineering
18.05.2018 | Information Technology
18.05.2018 | Information Technology