Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Nitrogen source determined significant for inflorescence development in Phalaenopsis

27.03.2014

Research shows importance of ample nitrogen fertilization at all growth stages

The Phalaenopsis orchid, also known as the moth orchid, is the most important pot flower in terms of market value in the world's major floriculture markets. Because nitrogen significantly affects the growth and flowering of Phalaenopsis, nitrogen needs during flowering are of particular interest to growers.


This is Sogo Yukidian 'V3' photographed at a nursery in Taiwan. The variety was used in a study of nitrogen significance in production of the popular moth orchid.

Credit: Photo by Yao-Chien Alex Chang

Researchers Hadi Susilo, Ying-Chun Peng, and Yao-Chien Alex Chang from the Department of Horticulture and Landscape Architecture at National Taiwan University published a study in the Journal of the American Society for Horticultural Science that determined the importance of providing Phalaenopsis with ample nitrogen fertilization at the its various growth stages.

"To our knowledge, the relative contributions of stored nitrogen (N) and recently absorbed fertilizer N to the developing inflorescence had not been studied in Phalaenopsis," the authors said. "The relative contributions to the stored N pool of N accumulated during the different growth stages during the long vegetative period of Phalaenopsis cultivation were also unknown. The objective of our study was to bring answers to these unknowns."

The team used N-labeling--a powerful research tool for accurately determining the fate of nitrogen in the environment--to compare the contributions of fertilizer N, applied before or after spiking, to the developing inflorescence, and compared the relative contributions of fertilizer N absorbed during various stages of the vegetative period to the stored N pool.

"The nutritional study of Phalaenopsis is difficult with traditional methods because it has a strong buffering capacity against nutrient deficiency, but we used 15N-labeling with the enrichment method to accurately trace the absorption and partitioning of fertilizer N in Phalaenopsis," the scientists said.

The results of multiple experiments showed that inflorescence is a major N sink during the reproductive stage of Phalaenopsis. "Fertilizer applied during the reproductive stage is a significant N source for the inflorescence development of Phalaenopsis, whereby current fertilizer application supplies 57% of the N required for inflorescence development. Therefore, providing sufficient fertilizer N is important during the reproductive stage to ensure the quality of flowering," the authors said.

Further experiments showed that, even when ample fertilization was provided during the reproductive stage, 6-8% of the nitrogen accumulated during growing Stage I (small plant in 4.5-cm pot for 5 months), Stage II (medium plant in 8.5-cm pot for 5 months), and Stage III (large plant in 10.5-cm pot for 5 months) ended up in the inflorescence at the visible bud stage.

At the "two-third flowers open" stage, 12-16% of the N accumulated in the plant during these three stages ended up in the inflorescence. The scientists concluded that these results indicated the importance of providing Phalaenopsis with ample N fertilization at all growth stages.

###

The complete study and abstract are available on the ASHS J. Amer. Soc. Hort. Sci. electronic journal web site: http://journal.ashspublications.org/content/139/1/69.abstract

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!
Further information:
http://www.ashs.org

More articles from Agricultural and Forestry Science:

nachricht Open-access article on Mexican bean beetles offers control tips
03.02.2016 | Entomological Society of America

nachricht Improved harvest for small farms thanks to naturally cloned crops
29.01.2016 | Universität Zürich

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: Automated driving: Steering without limits

OmniSteer project to increase automobiles’ urban maneuverability begins with a € 3.4 million budget

Automobiles increase the mobility of their users. However, their maneuverability is pushed to the limit by cramped inner city conditions. Those who need to...

Im Focus: Microscopy: Nine at one blow

Advance in biomedical imaging: The University of Würzburg's Biocenter has enhanced fluorescence microscopy to label and visualise up to nine different cell structures simultaneously.

Fluorescence microscopy allows researchers to visualise biomolecules in cells. They label the molecules using fluorescent probes, excite them with light and...

Im Focus: NASA's ICESat-2 equipped with unique 3-D manufactured part

NASA's follow-on to the successful ICESat mission will employ a never-before-flown technique for determining the topography of ice sheets and the thickness of sea ice, but that won't be the only first for this mission.

Slated for launch in 2018, NASA's Ice, Cloud and land Elevation Satellite-2 (ICESat-2) also will carry a 3-D printed part made of polyetherketoneketone (PEKK),...

Im Focus: Sinking islands: Does the rise of sea level endanger the Takuu Atoll in the Pacific?

In the last decades, sea level has been rising continuously – about 3.3 mm per year. For reef islands such as the Maldives or the Marshall Islands a sinister picture is being painted evoking the demise of the island states and their cultures. Are the effects of sea-level rise already noticeable on reef islands? Scientists from the ZMT have now answered this question for the Takuu Atoll, a group of Pacific islands, located northeast of Papua New Guinea.

In the last decades, sea level has been rising continuously – about 3.3 mm per year. For reef islands such as the Maldives or the Marshall Islands a sinister...

Im Focus: Energy-saving minicomputers for the ‘Internet of Things’

The ‘Internet of Things’ is growing rapidly. Mobile phones, washing machines and the milk bottle in the fridge: the idea is that minicomputers connected to these will be able to process information, receive and send data. This requires electrical power. Transistors that are capable of switching information with a single electron use far less power than field effect transistors that are commonly used in computers. However, these innovative electronic switches do not yet work at room temperature. Scientists working on the new EU research project ‘Ions4Set’ intend to change this. The program will be launched on February 1. It is coordinated by the Helmholtz-Zentrum Dresden-Rossendorf (HZDR).

“Billions of tiny computers will in future communicate with each other via the Internet or locally. Yet power consumption currently remains a great obstacle”,...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

AKL’16: Experience Laser Technology Live in Europe´s Largest Laser Application Center!

02.02.2016 | Event News

From intelligent knee braces to anti-theft backpacks

26.01.2016 | Event News

DATE 2016 Highlighting Automotive and Secure Systems

26.01.2016 | Event News

 
Latest News

A new potential biomarker for cancer imaging

05.02.2016 | Life Sciences

Graphene is strong, but is it tough?

05.02.2016 | Materials Sciences

Tiniest Particles Shrink Before Exploding When Hit With SLAC's X-ray Laser

05.02.2016 | Physics and Astronomy

VideoLinks
B2B-VideoLinks
More VideoLinks >>>