Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Nitrogen may increase Bt levels in corn

07.02.2003


Scientists study the affects of nitrogen fertilizer applied to corn hybrids



Scientists at the USDA-ARS, Jamie Whitten, Delta States Research Center in Stoneville, MS, have found that Bt concentrations in young corn plants are directly influenced by the amount of nitrogen fertilizer applied at planting. The research is published in the January-February 2003 issue of Agronomy Journal.

Hybrid corn cultivars genetically modified to have the Bt-producing gene synthesize special proteins that can kill the larva of certain corn insect pests, such as fall armyworm and southwestern cornborer. The Bt corn hybrids provide farmers with an alternative to avoid costly damage from feeding by these pests without the use of pesticides.


Two corn hybrids with different types of Bt toxin were used in the experiment. These hybrids were grown in pots in the greenhouse and two plantings were made. A common fertilizer used to grow corn, ammonium nitrate, was blended into the potting mixture prior to planting. Rates of fertilizer used in the experiment represented zero, low, normal, and high amounts of nitrogen used to grow corn. Pots were carefully watered to avoid leaching of the fertilizer during the experiment. When the plants had five fully extended leaves, sample tissues were taken to determine the Bt and nitrogen concentrations of the plant.

The levels of Bt toxin and total nitrogen in the plant steadily increased as the amount of nitrogen fertilizer increased. Both Bt hybrids responded the same to increasing levels of nitrogen fertilizer.

One of the two scientists who conducted the research, Dr. H. Arnold Bruns said, "The effectiveness of Bt hybrids to avoid insect damage may be dependent on the amount of nitrogen fertilizer applied to the crop early in the growing season. Further research will be necessary to determine if similar effects to Bt concentrations can be found in more mature corn. These findings could affect the way we manage nitrogen fertilizer applications to Bt hybrid corns".


Agronomy Journal, http://agron.scijournals.org is a peer-reviewed, international journal of agriculture and natural resource sciences published six times a year by the American Society of Agronomy (ASA). Agronomy Journal contains research papers on the subjects of soil and plant relationships; crop science; soil science; crop, soil, pasture, and range management; integrated agricultural systems. turfgrass; agroclimatology and agronomic modeling; environmental quality; and integrated pest management.

The American Society of Agronomy (ASA) www.agronomy.org, the Crop Science Society of America (CSSA) www.crops.org and the Soil Science Society of America (SSSA) www.soils.org are educational organizations helping their 10,000+ members advance the disciplines and practices of agronomy, crop and soil sciences by supporting professional growth and science policy initiatives, and by providing quality, research-based publications and a variety of member services.




Sara Uttech | EurekAlert!
Further information:
http://www.asa-cssa-sssa.org/
http://agron.scijournals.org

More articles from Agricultural and Forestry Science:

nachricht Light green plants save nitrogen without sacrificing photosynthetic efficiency
21.11.2017 | Carl R. Woese Institute for Genomic Biology, University of Illinois at Urbana-Champaign

nachricht Filling intercropping info gap
16.11.2017 | American Society of Agronomy

All articles from Agricultural and Forestry Science >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Nanoparticles help with malaria diagnosis – new rapid test in development

The WHO reports an estimated 429,000 malaria deaths each year. The disease mostly affects tropical and subtropical regions and in particular the African continent. The Fraunhofer Institute for Silicate Research ISC teamed up with the Fraunhofer Institute for Molecular Biology and Applied Ecology IME and the Institute of Tropical Medicine at the University of Tübingen for a new test method to detect malaria parasites in blood. The idea of the research project “NanoFRET” is to develop a highly sensitive and reliable rapid diagnostic test so that patient treatment can begin as early as possible.

Malaria is caused by parasites transmitted by mosquito bite. The most dangerous form of malaria is malaria tropica. Left untreated, it is fatal in most cases....

Im Focus: A “cosmic snake” reveals the structure of remote galaxies

The formation of stars in distant galaxies is still largely unexplored. For the first time, astron-omers at the University of Geneva have now been able to closely observe a star system six billion light-years away. In doing so, they are confirming earlier simulations made by the University of Zurich. One special effect is made possible by the multiple reflections of images that run through the cosmos like a snake.

Today, astronomers have a pretty accurate idea of how stars were formed in the recent cosmic past. But do these laws also apply to older galaxies? For around a...

Im Focus: Visual intelligence is not the same as IQ

Just because someone is smart and well-motivated doesn't mean he or she can learn the visual skills needed to excel at tasks like matching fingerprints, interpreting medical X-rays, keeping track of aircraft on radar displays or forensic face matching.

That is the implication of a new study which shows for the first time that there is a broad range of differences in people's visual ability and that these...

Im Focus: Novel Nano-CT device creates high-resolution 3D-X-rays of tiny velvet worm legs

Computer Tomography (CT) is a standard procedure in hospitals, but so far, the technology has not been suitable for imaging extremely small objects. In PNAS, a team from the Technical University of Munich (TUM) describes a Nano-CT device that creates three-dimensional x-ray images at resolutions up to 100 nanometers. The first test application: Together with colleagues from the University of Kassel and Helmholtz-Zentrum Geesthacht the researchers analyzed the locomotory system of a velvet worm.

During a CT analysis, the object under investigation is x-rayed and a detector measures the respective amount of radiation absorbed from various angles....

Im Focus: Researchers Develop Data Bus for Quantum Computer

The quantum world is fragile; error correction codes are needed to protect the information stored in a quantum object from the deteriorating effects of noise. Quantum physicists in Innsbruck have developed a protocol to pass quantum information between differently encoded building blocks of a future quantum computer, such as processors and memories. Scientists may use this protocol in the future to build a data bus for quantum computers. The researchers have published their work in the journal Nature Communications.

Future quantum computers will be able to solve problems where conventional computers fail today. We are still far away from any large-scale implementation,...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Ecology Across Borders: International conference brings together 1,500 ecologists

15.11.2017 | Event News

Road into laboratory: Users discuss biaxial fatigue-testing for car and truck wheel

15.11.2017 | Event News

#Berlin5GWeek: The right network for Industry 4.0

30.10.2017 | Event News

 
Latest News

Previous evidence of water on mars now identified as grainflows

21.11.2017 | Physics and Astronomy

NASA's James Webb Space Telescope completes final cryogenic testing

21.11.2017 | Physics and Astronomy

New catalyst controls activation of a carbon-hydrogen bond

21.11.2017 | Life Sciences

VideoLinks
B2B-VideoLinks
More VideoLinks >>>