Navigation Links
Plant growth rate, stem length unaffected by rice hull, peat substrate
Date:6/22/2011

WEST LAFAYETTE, INPlant growth retardants, or PGRs, are used in greenhouse operations to produce uniform, compact, and marketable plants. Although PGRs can be applied using a variety of methods, most common applications are foliar sprays or substrate "drenches". Research has shown that drenches provide more uniform results and increase the duration of effectiveness compared with sprays, but the efficacy of drenches can be affected by factors such as the amount of solution applied and the substrate components used.

Organic components such as parboiled rice hulls are becoming more common in soilless growing substrates. While some organic substrate components, such as bark, have been shown to reduce the efficacy of PGR drenches, the influence of rice hulls had not been determined until recently. Purdue University scientists Christopher Currey, Diane Camberato, Ariana Torres, and Roberto Lopez published a research report in HortTechnology that identified the impact of a substrate containing rice hulls on PGR applications for controlling plant height or stem length of containerized greenhouse crops.

For the experiments, 'Callie Deep Yellow' calibrachoa and 'Delta Orange Blotch' pansy were planted in containers filled with a substrate containing 80% peat and 20% perlite or 80% peat and 20% parboiled rice hulls. After planting, 2.5-fl oz drenches containing deionized water or ancymidol, paclobutrazol, or uniconazole were applied to plants grown in each substrate.

Results showed that plant growth retardants, but not substrate, affected growth rate and final stem length of calibrachoa. Similar to calibrachoa, the rate of growth and plant height of pansy 6 weeks after applications was affected by PGR, but not substrate.

"There was no significant difference in final plant height or stem length of pansy or calibrachoa, respectively, between plants grown in standard or rice hull substrate when given identical PGR applications. Based on these results, rice hulls did not reduce PGR drench efficacy when included as a substrate component comprising 20% of a substrate", noted corresponding author Lopez.

"Our research shows that producers may employ PGR drench strategies that have previously been used for plants grown in substrate comprised of peat and perlite for plants grown in substrate containing peat and rice hulls at the proportions used in this study", concluded Lopez.


'/>"/>

Contact: Michael W. Neff
mwneff@ashs.org
703-836-4606
American Society for Horticultural Science
Source:Eurekalert

Related biology news :

1. Plant pathologist finding Kansas wheat fields a molecular battleground this season
2. 2 UC Davis plant biologists named as HHMI-GBMF investigators
3. Not just another brick in the (plant cell) wall
4. Plants teach humans a thing or two about fighting diseases
5. The sweet growth of plant cells
6. MSU plant scientist named one of the nations most innovative researchers
7. Caltech scientist awarded $5 million grant for plant research
8. What makes a plant a plant?
9. Study reveals important aspects of signaling across cell membranes in plants
10. Healing times for dental implants could be cut
11. Global strategy for plant conservation conference to take place at the Missouri Botanical Garden
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:3/23/2016)... WAKEFIELD, Massachusetts , March 23, 2016 ... kombiniert im Interesse erhöhter Sicherheit Gesichts- und ... Xura, Inc. (NASDAQ: MESG ... heute bekannt, dass das Unternehmen mit SpeechPro ... insbesondere aus der Finanzdienstleistungsbranche, wird die Möglichkeit ...
(Date:3/18/2016)... -- --> --> Competitive ... Unmanned Vehicles, Physical infrastructure and Perimeter Surveillance & Detection Systems ... security market and the continuing migration crisis in the ... has led visiongain to publish this unique report, which ... defence & security companies in the border security market ...
(Date:3/14/2016)... NXTD ) ("NXT-ID" or the "Company"), ... the airing of a new series of commercials on Time ... 21 st .  The commercials will air on Bloomberg TV, ... the Street show. --> NXTD ) ("NXT-ID" or ... market, announces the airing of a new series of commercials ...
Breaking Biology News(10 mins):
(Date:4/28/2016)... ... 28, 2016 , ... As part of an ongoing global ... expanding its LATAM network and logistics capabilities. Enhancements have been made to ... trial projects. , The expansion will provide unmatched clinical trial logistics services for ...
(Date:4/27/2016)... (PRWEB) , ... April 27, 2016 , ... Cambridge ... by semantic web technology, today announced that it has been named to The Silicon ... sciences, financial services and other markets, Cambridge Semantics serves the needs of end users ...
(Date:4/27/2016)... ... April 27, 2016 , ... The Pittcon Organizing Committee is pleased ... has been a volunteer member of Committee since 1987. Since then, he has served ... and treasurer and was chairman for both the program and exposition committees. In his ...
(Date:4/27/2016)... , April 27, 2016 ... NSK) (OTCPink: NSKQB) ( Frankfurt : ... ihre Pressemitteilung vom 13. August 2015 die Genehmigung ... Finanzen um zusätzliche 200.000.000 Einheiten auf 400.000.000 Einheiten ... zu bringen. Davon wurden 157.900.000 Einheiten mit dem ...
Breaking Biology Technology: