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:4/13/2017)... India , April 13, 2017 According to ... Proofing, Identity Authentication, Identity Analytics, Identity Administration, and Authorization), Service, Authentication Type, ... MarketsandMarkets™, the IAM Market is expected to grow from USD 14.30 Billion ... Growth Rate (CAGR) of 17.3%. ... MarketsandMarkets ...
(Date:4/6/2017)... LONDON , April 6, 2017 ... Control, RFID, ANPR, Document Readers, by End-Use (Transportation & ... Energy Facility, Oil, Gas & Fossil Generation Facility, Nuclear ... Healthcare, Educational, Other) Are you looking for ... Authentication sector? ...
(Date:4/3/2017)... , April 3, 2017  Data captured ... engineering platform, detected a statistically significant association ... prior to treatment and objective response of ... potential to predict whether cancer patients will ... treatment, as well as to improve both pre-infusion ...
Breaking Biology News(10 mins):
(Date:10/11/2017)...  VMS BioMarketing, a leading provider of patient support solutions, ... Educator (CNE) network, which will launch this week. The VMS ... care professionals to enhance the patient care experience by delivering ... health care professionals to help women who have been diagnosed ... ...
(Date:10/11/2017)... Tampa Bay, Florida (PRWEB) , ... October 11, ... ... Food and Drug Administration (FDA) has granted orphan drug designation to SBT-100, its ... antibody (sdAb) for the treatment of osteosarcoma. SBT-100 is able to cross the ...
(Date:10/10/2017)... California (PRWEB) , ... October 10, 2017 , ... Dr. ... speaking at his local San Diego Rotary Club. The event entitled ... Diego, CA and had 300+ attendees. Dr. Harman, DVM, MPVM was joined by ...
(Date:10/10/2017)... ... October 10, 2017 , ... The Pittcon Program Committee ... honoring scientists who have made outstanding contributions to analytical chemistry and applied ... the world’s leading conference and exposition for laboratory science, which will be held ...
Breaking Biology Technology: