Navigation Links
Rice hulls a sustainable drainage option for greenhouse growers
Date:10/25/2010

WEST LAFAYETTE, Ind. - Greenhouse plant growers can substitute rice hulls for perlite in their media without the need for an increase in growth regulators, according to a Purdue University study.

Growing media for ornamental plants often consists of a soilless mix of peat and perlite, a processed mineral used to increase drainage. Growers also regularly use plant-growth regulators to ensure consistent and desired plant characteristics such as height to meet market demands. Organic substitutes for perlite like tree bark have proven difficult because they absorb the plant-growth regulators and keep them from getting to the plants. Using bark requires a 25 percent increase in the volume of growth regulators applied.

"We were not sure whether rice hulls, as an organic component, would hold up the growth regulator," said Roberto Lopez, a Purdue assistant professor of horticulture and co-author of a HortTechnology paper that outlined the findings. "Testing showed that there were no differences in plants grown with rice hulls or perlite."

Pansies and calibrachoa were planted in an 80-20 mix of both peat and perlite and peat and rice hulls and then treated with several different growth regulators. The plants treated with and without growth regulators and grown in peat and perlite and peat and rice hulls had similar heights and stem lengths.

Finding a waste product to replace perlite could reduce the price of growing media since perlite must be mined and heat processed.

"It's a really energy-intensive process and, because it's a mineral, it's non-renewable," said Chris Currey, a horticulture graduate student and co-author of the HortTechnology paper.

Rice hulls are an attractive option, Lopez said, because they can be easily transported on barges and rice growers in the South could increase profits by selling a traditional waste product.

"Often these rice hulls were being burnt because there's not a lot of other use for them," Lopez said.


'/>"/>

Contact: Brian Wallheimer
bwallhei@purdue.edu
765-496-2050
Purdue University
Source:Eurekalert  

Related biology news :

1. Gene that causes barnacles to avoid ship hulls identified
2. Resource-savvy communities generate healthy, sustainable changes
3. A plan to promote sustainable US scientific discovery and innovation in the 21st century is proposed in OMICS
4. Scientists develop sustainable, environmentally friendly potting medium
5. Stanford engineers use rocket science to make wastewater treatment sustainable
6. International panel recommends redirecting the world community toward sustainable growth
7. Massive resources now directed at sustainable animal waste technology
8. Sari cloth a simple sustainable protector from cholera
9. Sustainable fishing is possible and necessary
10. Sustainable use of our seas needs an integrated view of humans and nature
11. European Alliance targets separation technologies for sustainable energy systems
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Rice hulls a sustainable drainage option for greenhouse growers
(Date:4/28/2016)... First quarter 2016:   , ... the first quarter of 2015 The gross margin was ... 18.8) and the operating margin was 40% (-13) Earnings ... flow from operations was SEK 249.9 M (21.2) , ... SEK 7,000-8,500 M. The operating margin for 2016 is ...
(Date:4/15/2016)... 2016 Research and Markets has ... Market 2016-2020,"  report to their offering.  , ... ,The global gait biometrics market is expected to ... period 2016-2020. Gait analysis generates multiple ... used to compute factors that are not or ...
(Date:3/29/2016)... Florida , March 29, 2016 ... the "Company") LegacyXChange "LEGX" and SelectaDNA/CSI Protect are pleased ... in ink used in a variety of writing instruments, ... Buyers of originally created collectibles from athletes on LegacyXChange ... forensic analysis of the DNA. Bill ...
Breaking Biology News(10 mins):
(Date:5/25/2016)... (PRWEB) , ... May 25, 2016 , ... ... of a Thai delegation at BIO 2016 in San Francisco. Located at booth ... will be available to answer questions and discuss the Thai biotechnology and life ...
(Date:5/25/2016)... ... May 25, 2016 , ... Founder of the Fitzmaurice ... surgery and surgery of the hand by the National Board of Physicians and ... above and beyond in his pursuit of providing the most comprehensive, effective treatment ...
(Date:5/25/2016)... , ... May 25, 2016 , ... Scientists at the ... options being tried for mesothelioma may be hampering the research that could lead to ... Click here to read it now. , The team evaluated 98 ...
(Date:5/25/2016)... ... May 25, 2016 , ... Lady had been battling arthritis since ... ligament in her left knee. Lady’s owner Hannah sought the help of Dr Jeff ... surgeon, to repair her cruciate ligament and help with the pain of Lady’s arthritis. ...
Breaking Biology Technology: